Department of Genetics

Welcoming our new MSc and PhD cohort: Research shaping the future of genetics

As a department, we are proud to welcome a new cohort of 14 MSc and 3 PhD students who have successfully registered within either the Faculty of Science or the Faculty of AgriSciences at Stellenbosch University.

Their entry into our postgraduate research programmes follows the completion of an important academic milestone: The Proposal Presentation Process.

Each student was required to engage extensively with their field through in-depth reading, critical evaluation of current literature, and consultation with supervisors and subject specialists. This ensures that each project is scientifically grounded, relevant, and appropriately positioned within the broader research landscape.

Each MSc candidate subsequently presented a 15-minute proposal to the department, followed by questions and discussion from academic staff and peers. These sessions are structured to critically assess each project, refine its direction, and strengthen its methodological approach before the research phase begins.

Crop genetics and agricultural systems

A significant portion of this year’s MSc cohort is focused on improving crops and agricultural systems, work that directly links to food security and sustainable farming.

Some students are working on understanding plant diseases and how they affect crops, such as Elmi Bruwer’s research on a bacterial pathogen impacting plants. Others, like Mariska van Niekerk, are using advanced technologies to improve crop yields, while Karla Stumpf is investigating how temperature affects reproduction in wheat.

Research by Mia de Goede looks at how useful traits from wild plant relatives can be introduced into wheat to improve performance. Beyond cereals, Ingela Berger is studying genetic relationships in avocado populations, and Andrea Gordon is exploring how grapevines respond to environmental stress.

There is also a strong focus on plant products and quality. Mishaylin  Naidoo is investigating the properties of marula oil, an important indigenous resource, while Byron Whitehead examines how enzymes influence sugar accumulation in potatoes during cold storage. Complementing this, K’Mari van Niekerk studies how grapevines produce and use chemical signals, which play a role in plant communication and ecological interactions.

Animal and conservation genetics

In conservation genetics, students are working to better understand and protect vulnerable marine species.

Meagan Classen is identifying important population groups and suitable habitats for critically endangered guitarfish species, while Joané van Dyk is helping define conservation units for endangered stingray species in the Southwest Indian Ocean. In addition Warrick Bredenkamp is investigating the relationship between abalone populations and harmful algal blooms (red tides), which has important implications for marine ecosystems and fisheries.

Human and biomedical genetics

The cohort also includes research focused on human health and disease.

Marli Meyer is studying how cells produce and use energy under conditions related to high blood sugar, using zebrafish as a model system. Etresia-Marié Nortjé is investigating how specific genetic changes may contribute to cancer, with the aim of better understanding disease mechanisms at a molecular level.

PhD registration and proposal process

The department has also registered three PhD candidates, Ms Madelein Dippenaars, Mr Daniel Allsopp, Ms Caitlin Jade Ching within the Faculty of Science.

The PhD registration process differs from that of MSc students and involves a more extensive evaluation. Candidates are required to develop a full research proposal, which is first internally assessed by an academic panel within the department. Following this, an executive summary is submitted to the Faculty for further evaluation and approval.

At present, Ms Dippenaars has successfully presented her proposal, titled “Investigation of the molecular interactions and host adaptation of ‘Candidatus Liberibacter africanus’”. This work aligns with ongoing research in plant-pathogen interactions within the department.

Mr Daniel Allsopp has completed his registration process, with his proposal presentation to follow

From proposal to impact

These proposal presentations represent more than a formal requirement, they mark the transition from engaging with existing knowledge to generating new scientific insight. The discussions and feedback received during these sessions play a critical role in shaping the direction, quality, and impact of each project.

We congratulate all our MSc and PhD students on reaching this milestone and look forward to the contributions they will make in advancing genetics research.

Composed by MSL le Roux

Building Scientific Futures: Genetics Celebrates a Defining Graduation Year

The Department of Genetics at Stellenbosch University proudly celebrates one of its largest MSc graduating cohorts in recent years, alongside the successful completion of two PhD candidates. March 2026 graduation ceremonies marked a significant milestone for our department, with candidates graduating across both the Faculty of Science and the Faculty of AgriSciences.

In the lead-up to graduation, each student completed a rigorous research journey, culminating in a formal defence presentation assessed by an academic panel. These sessions evaluated not only scientific depth, but also critical thinking, methodological rigour, and the ability to engage with complex biological questions  a process that defines the standard of postgraduate training in our department.

Plant Genetics and Biotechnology

Within plant genetics and biotechnology, several projects addressed pressing challenges in agriculture, crop improvement, and food systems.

Under the supervision of Prof J Lloyd, Ms Janet Keyter contributed to advancing genome editing technologies through her work on potato and tobacco systems, strengthening translational approaches in plant biotechnology.

Dr C van der Vyver supervised two projects focused on crop and tree biology. Mr Kondwani Banda investigated the manipulation of flower induction in fruit trees, while Mr Harry Frith worked on the functional characterization of water-deficit stress-inducible promoters in transgenic sugarcane. 

Dr S Peters, supervised Ms Leanne Walker, whose work focused on the characterization of minimal abiotic stress-inducible promoters for crop protection, advancing molecular tools for stress resilience.

Further strengthening the biotechnology space, Dr B van Asch supervised Ms Sunthuri Rajaruthnam, whose research explored mycelium-based biomaterials and fungal biobank diversity, bridging biotechnology innovation with sustainable material science.

Animal, Marine, and Conservation Genetics

The department’s strong presence in marine and animal genetics was reflected in several impactful studies addressing biodiversity, conservation, and aquaculture.

Under the supervision of Prof AE Bester-van der Merwe, Mr Nick Clemo investigated the conservation genetics of scalloped hammerhead sharks in the Southwestern Indian Ocean, contributing critical insights toward marine conservation strategies.

Prof C Rhode supervised two students working within aquaculture and fish genetics. Ms Mieke Jansen van Rensburg examined genetic diversity and growth traits in yellowtail fish, whereas Ms Stephanie Linder investigated genetic variation in candidate heat tolerance genes and their association with growth performance in dusky kob (Argyrosomus japonicus). 

Human and Health-Related Genetics

Human and medical genetics also formed component of this cohort, highlighting the department’s role in addressing complex health challenges.

Dr B Pearce supervised multiple projects within this space. Ms Robyn Austin investigated the influence of mitochondrial genomic dysfunction on lipid homeostasis in lipidaemic diseases, while Ms Tiffany Clinton conducted an in silico investigation into mitochondrial DNA mutations in Type 2 Diabetes and Degenerative Disc Disease — bridging computational biology with clinical relevance.

Further expanding into psychiatric genetics, Ms Cassidy Gray, co-supervised by Dr B Pearce and Dr NW McGregor, explored mitochondrial and mitonuclear contributions to schizophrenia symptom severity using a GWAS approach in a South African cohort, contributing to our understanding of complex neurogenetic disorders.

Innovation at the Interface of Nutrition and Biotechnology

At the intersection of plant science, nutrition, and product development, Dr B Loedolff supervised Ms Meghan Oosthuizen, whose work focused on the development of a carrot (Daucus carota) microgreen-based product for use as a supplement in bottled water highlighting the department’s growing footprint in functional foods and translational research.

Doctoral Graduates

The department also proudly celebrates the graduation of two PhD candidates, reflecting the continued strength of advanced research within our academic environment.

Dr Jessica Winn, supervised by Prof AE Bester-van der Merwe and co-supervised by Dr SN Maduna, conducted an evolutionary ecological genomics study on the smoothhound shark (Mustelus mustelus). Her research integrated mitophylogenomics and seascape genomics to uncover adaptive population structure across regional and global scales, providing critical insights into conservation unit delineation and the management of vulnerable marine species.

In plant biotechnology, Dr Casey  Gabriel, supervised by Prof J Lloyd and co-supervised by Prof C Rhode, investigated the genetic basis of flowering traits in Cannabis sativa under differential environmental conditions. This work identified key genetic loci influencing bud density and growth performance, contributing to crop optimisation and the emerging medicinal cannabis industry in South Africa.

Dr Maipato Margaret Mota, co-supervised by Dr C van der Vyver , completed her PhD in Agronomy focusing on induced mutation approaches to improve drought adaptation and productivity in potato. Her research demonstrates the potential of mutation breeding to develop drought-tolerant lines, contributing to improved crop performance and resilience under water-limited conditions in Southern Africa.

Dr Godwin Mafireyi, supervised by Emeritus Prof Johan Burger, completed his PhD in cucurbit genomics. His research contributes to advancing our understanding of genomic architecture and trait development within cucurbit crops, supporting future breeding and crop improvement strategies.

A Cohort Defined by Impact

What distinguishes this Msc cohort is not only its size, but the breadth of its scientific contributions spanning genome editing, drought tolerance, conservation genetics, complex disease, and biotechnology innovation.

Each graduate has emerged from a demanding academic process as a skilled researcher, equipped to contribute meaningfully to academia, industry, and society. As a department, we are proud to have guided this journey and look forward to the continued impact of our graduates.

Composed by The Department Scribe – M. le Roux

Uncovering the genetic story of Cape snoek: New research brings clarity, not controversy

For generations, Cape snoek (Thyrsites atun) has been more than a fish along South Africa’s coastline. It is a cultural staple, a source of livelihood, and an important contributor to food security, particularly in coastal communities of the Western Cape.

While public discussion has sparked some debate (on recent article in Cape Argus) , this research is not about restricting fishing, but about improving our biological understanding of a species that holds deep economic and cultural value.

Now, new research from the Department of Genetics at Stellenbosch University is helping to deepen our understanding of this iconic species. Rather than challenging the fishing industry, the study provides a critical biological perspective on how snoek populations are structured and connected.

Behind this work is Dr Siphesihle Mthethwa, a recent PhD graduate whose journey reflects both scientific dedication and personal resilience. From this PhD, he has produced two peer reviewed international publications, including work on the mitochondrial genome of Cape snoek , strengthening the scientific foundation of his findings and establishing him as a an emerging expert in marine genetics.

A journey of perseverance and purpose

Originally from Umzumbe, near Port Shepstone on the south coast of KwaZulu Natal, Dr Mthethwa began his academic journey at the University of KwaZulu Natal. In 2019, he started his PhD in Genetics at Stellenbosch University within the Molecular Breeding and Biodiversity research group, under the supervision of Prof Rouvay Roodt Wilding and Prof Aletta Bester van der Merwe.

What makes this achievement particularly noteworthy is that he completed his PhD part time, while working as a Technical Officer managing two research laboratories within the department. 

Balancing research, laboratory responsibilities, and personal commitments over several years, he graduated in 2025. This milestone is not only significant for him, but also for his family, whose support played an important role throughout his journey.

Looking beneath the surface: what the genetics reveals

Using advanced molecular tools, Mthethwa analysed both mitochondrial DNA and nuclear markers to investigate snoek populations across the southern hemisphere, including South Africa, New Zealand, Chile, and surrounding ocean systems.

The study revealed that Cape snoek and New Zealand barracouta are the same species. However, populations are not fully mixed and instead show clear genetic structuring. Within South Africa, at least two reproductively distinct groups were identified.

These findings suggest that while snoek is often treated as a single resource, it is biologically more complex, with different populations potentially responding differently to environmental conditions.

What this does and does not mean

Importantly, this research is not a fisheries stock assessment and does not attempt to make economic or policy conclusions. The research does not claim definitive declines or prescribe management actions, but rather identifies biological patterns such as population structure, connectivity, and changes in genetic diversity over time.

As Dr. Mthethwa explains:

Genetic data reflects long term biological patterns such as connectivity, diversity, and historical population changes. It does not replace fisheries data, but adds an important layer of understanding.”

These insights are intended to contribute to a broader, more informed conversation that includes scientists, industry, and coastal communities.

Science in service of people and communities

At its core, this research improves our understanding of a species with both ecological and social importance. For Dr Mthethwa, the work reflects a journey from the KwaZulu-Natal coast to contributing internationally relevant science.

By combining rigorous research with real-world relevance, this study supports more informed discussions about the future of Cape snoek and the communities that depend on it.

 

Your departmental scribe

M. Le Roux

 

Welcoming Our 2026 Honours Students to Genetics and IPBB

The Department of Genetics and the Institute for Plant Breeding and Biotechnology (IPBB) proudly welcome our 2026 Honours cohort into the department’s research environment. This year, a collective group of 30 students begin this important academic chapter, comprising 18 IPBB Honours students and 12 Genetics Honours students.

The majority of students completed their undergraduate studies at Stellenbosch University and now entering the honours programme with a collective undergraduate class average well above national benchmarks (approximately 70–75%). These numbers reflect more than performance; they reflect discipline, consistency, and readiness for the demands ahead.

The Honours year marks a deliberate shift from structured undergraduate learning to independent scientific inquiry. During the first six months, students will complete advanced coursework in genetics and biotechnology, refining their analytical reasoning, experimental design, and scientific writing skills. This theoretical foundation prepares them for the next critical step  the selection of their individual research projects.

In the coming weeks, students will choose from a diverse portfolio of projects spanning biotechnology, molecular genetics, genomics, bioinformatics, and applied breeding research across plant, animal, and human systems. Once projects are allocated, each student will be supported by an academic supervisor who provides strategic scientific direction and intellectual oversight, as well as a laboratory mentor  often a postgraduate student or postdoctoral fellow  who assists with day-to-day experimental training and integration into the research environment.

As your departmental scribe, I would like to remind us all that Honours may not be about immediate breakthroughs, but about formation. It is in the long hours, the troubleshooting, the unexpected experimental results, and the persistence through uncertainty that real growth occurs. Somewhere between data sheets and discussions, students begin to think not only as learners, but as scientists.

To our 2026 Honours cohort – welcome. The journey ahead will challenge you, but it will also shape you.

Our 2026 Honours cohort from the Plant Biotechnology and Breeding (IPBB), captured at the beginning of their research journey, a new generation of scientists ready to translate knowledge into discovery.

 

The 2026 Genetics Honours cohort, stepping confidently into the laboratory phase of their academic journey, where knowledge meets experimentation.

2025 Year-End Overview: A Landmark Centenary for the Department of Genetics and IPBB

The Department of Genetics together with the Institute for Plant Breeding and Biotechnology concludes 2025 with a year defined by celebration, achievement and renewed purpose. Marking 100 years of genetics at Stellenbosch University, the department stands today as a vibrant community of 25 academic staff members, 8 technical officers and 2 administrative staff, all of whom sustain one very active scientific environments in the faculty. This community supports 95 postgraduate students across honours, master’s and doctoral programmes, together with 8 postdoctoral research fellows who continue to push the boundaries of discovery. Their collective efforts have advanced genetic research, illuminated complex biological questions and produced new knowledge that has made this centenary year truly one to remember.

Centenary Celebrations and Academic Community Life

A vibrant calendar of centenary activities helped shape the spirit of the year. A film screening created opportunities for students, academics and alumni to explore the evolution of genome editing as a discipline and to consider how far the field has advanced since the department’s founding. The centenary symposium at STIAS became the intellectual centrepiece of the celebrations. Staff, students and alumni gathered in Stellenbosch to share their research, reflections and honour one hundred years of scientific leadership in genetics.

Teaching and Learning Excellence

Teaching remained a cornerstone of the department’s mission throughout this centenary year. Academics delivered an extensive curriculum comprising 15 undergraduate modules across Genetics, Biotechnology, Plant Breeding, Biology and Biometry, as well as 12 postgraduate Honours modules in Genetics and Plant Biotechnology. These programmes required substantial preparation, laboratory coordination and sustained teaching hours, reflecting a deliberate effort to provide specialist scientific training that equips students for careers in both industry and research. The depth and breadth of these modules continue to strengthen the department’s reputation for offering one of the most comprehensive genetics teaching portfolios in the country.

The outcomes of these efforts are clearly visible in the achievements of our students. Fourteen Biotechnology Honours students and sixteen Genetics Honours students will graduate this year. Their programme consisted of six months of intensive coursework followed by four months of laboratory based research focused on real world scientific problems. After completing their research, each student presented and defended their project before the department, an exercise that strengthened their scientific communication and critical reasoning. Images from these presentations are included below.

The department also saw the graduation of three MSc students this year (M Dippenaar, C Engelsman, S Goodchild). Each candidate completed two years of dedicated research work followed by the writing of a full thesis, with some students publishing their findings in peer reviewed journals. As with the honours programme, the MSc degree concluded with an oral departmental defence that allowed candidates to present, justify and reflect on their research journeys.

At doctoral level, the department celebrated the graduation of two PhD students in 2025 ( now referred to with titled as Dr Jessica Vervalle and Dr SihleMthethwa). The PhD degree represents a minimum of three years of intensive research that must be both novel and publishable, with at least one peer reviewed publication required for completion. PhD candidates undergo rigorous proposal development, data generation, thesis writing and international examination processes before defending their work publicly within the department.

he outlook for 2026 is particularly strong. The Honours programme is expected to welcome approximately 40 new students, while the incoming MSc cohort already includes 20 confirmed candidates, among them three students joining from Wits. The doctoral pipeline is also growing steadily, with four new PhD applicants currently under review for the year ahead.

Several recognitions highlighted academic excellence within the department this year. Elmi Bruwer received the Hofmeyr van Schaik Medal for being the top fourth year student in Genetics, while Ethan Paton received the Academic Excellence Award as the top fourth year student within the IPBB.

A notable staff achievement was the twenty five year long service award presented to Prof Aletta Bester van der Merwe. Her extensive contributions in molecular population genetics, marine genomics and wildlife forensics, together with her longstanding commitment to teaching and postgraduate supervision, have shaped both the department and the broader scientific community. The department also celebrated the awarding of the 2025 Chancellor’s Award to Prof Johan Burger, recognising his exceptional lifetime contribution to research, teaching and scientific leadership.

In addition to these academic recognitions, the department hosted its annual end of year function, a gathering that brought together staff, and postgraduate students to celebrate the achievements of 2025. (See photos below.)

 

Research Productivity and International Impact

The department’s research performance continued to strengthen its reputation as a centre of innovation. Together, the Department of Genetics and the IPBB produced forty four peer reviewed publications in 2025, representing an impressive spread of research across insects, animals, fish, fruit crops, cereals and human genetics. This diversity reflects the breadth of expertise within the department and highlights the interdisciplinary character of our research environment. Throughout the year, academics, students, post-docs presented their findings at various conferences across the world, ensuring that the department’s work remains visible and influential within global scientific networks.

The Phenotyping Facility also experienced an exceptional year. Its two TraitFinder systems supported fifteen research projects, serving both internal and external collaborators. Harvesting, led by Ms Cecil Bester and the Plant Breeding Laboratory team, progressed without major obstacles and remains on schedule for completion in December. The facility continues to be a strategic asset for Stellenbosch University and a catalyst for advanced plant phenotyping research in Africa.

The IPBB also recorded a year of strong innovation driven activity that reflects its mandate to advance applied biotechnology and crop improvement. Several research projects within the institute made notable progress on early-stage technologies and translational approaches with potential for public facing impact. While many of these outputs are still under development, they represent an exciting pipeline for 2026 contributions that will support industry, agriculture and food security.

Service to the Scientific and National Community

Service was a defining thread throughout the year. Staff contributed to national advisory boards, governmental discussion panels, journal editorial committees and postgraduate examination panels. These roles ensure that the department’s expertise continues to inform scientific decision making, policy development and the advancement of genetics education and research in South Africa and beyond.

Farewell to Colleagues

This milestone year also brings heartfelt farewells. Two of our colleagues, Willem Botes and Paul Hills, have moved on to exciting new professional opportunities outside the university. Their contributions to plant breeding and plant biotechnology have shaped generations of students and advanced key areas of research within the department. We celebrate their achievements and wish them great success as they take on new roles in their respective fields.

We also mark the retirement of Johan Burger whose distinguished career has left a deep imprint on the department. His leadership in molecular genetics and plant virology, along with his mentorship of countless postgraduate researchers, has been central to the department’s development. Although his presence will be greatly missed, we extend our warmest wishes as he enters a well deserved new chapter of life.

Looking Ahead

This year we celebrate the graduation of 35 students across the Honours, Masters and Doctoral programmes, each representing a new spark of possibility for the future of genetics and biotechnology. Their achievements remind us of the transformative power of education and the promise carried forward by every new scientist we train. Their success is also a reflection of the remarkable people who sustain this department. Our academic, technical and administrative staff pour countless hours into thoughtful teaching, careful laboratory preparation, rigorous supervision and compassionate mentorship. It is through their dedication that our students discover their potential, and through their guidance that the next century of genetic discovery will be shaped.

As the departmental scribe, it is a privilege to  have witness the closing of this milestone year. In reflecting on all that our community has achieved, I am reminded of a truth that speaks to the heart of who we are:

Excellence is not achieved in comfort. It is built by people who choose to show up, even when it is difficult, and still give their best.

Your departmental scribe

M. Le Roux

From Lecture Halls to Vineyards: Celebrating the Retirement of Prof Johan Burger

Prof. Johan Burger – a plant virologist has been a cornerstone of the Stellenbosch University Department of Genetics for the last 29 years. As a lecturer, he designed and taught foundational molecular genetics courses that shaped the scientific grounding of thousands of undergraduate students. As a former Head of Department, he provided steady leadership during pivotal years of growth and transitioning. As a supervisor, he trained and mentored hundreds of postgraduate students who now contribute to academia, industry and global scientific communities. Beyond his scientific work, Prof. Burger also served on numerous committees and advisory boards across academic, government and private sectors, contributing his expertise to national policy discussions, scientific review panels and industry collaborations. These roles extended his influence far beyond the laboratory, helping shape decision making in plant health, biotechnology and agricultural innovation.

Yet for all his accomplishments, it is his mentorship thoughtfulness, patience and deep humanity that has shaped a generation of scientists whose careers continue to reflect his influence. As he now steps into retirement, the Department reflects on the career of a professor whose teaching, research, and service have left an enduring mark on Stellenbosch University.

When asked what first drew him into plant virology, one might expect a carefully planned academic trajectory.

Instead, as Prof. Burger explained with a smile, his journey into the field happened “by chance.” His father wanted him to study medicine, consequently he applied and was accepted into medical school in Pretoria, as expected he boarded the train heading north but somewhere around De Aar, he realised with sudden clarity that this path was not truly his. So he did something remarkably bold: he got off the train, turned back to Cape Town (Stellenbosch), and abandoned medicine before it ever began.

From there, he enrolled in Food Science at Stellenbosch university (1983), where an unlikely mentor changed everything: a lecturer remembered less for his teaching and more for his love of motorbikes. Their shared enthusiasm for motorcycles grew into a friendship, and this same lecturer became the first person to introduce him to plant viruses. “I was thoroughly hooked on virology after that,” he recalled. That early fascination ultimately led him to shift his academic path from Food Science to a BSc in Plant Pathology.

After completing his a BSc in Plant Pathology he fulfilled the compulsory national service required of young men in South Africa, a period he describes as “formative.” Noting that the leadership responsibilities he took on in a 33-year (part-time) military career, including eventually serving as a commanding officer of 3 Field Engineer regiment, helped shape his maturity and confidence rather than influencing his scientific direction. He later joined the University of Cape Town to study under Prof Barbara von Wechmarand Prof Ed Rybicki plant virology, where he entered a Master’s programme that eventually upgraded into a PhD focusing on “The characterisation of Ornithogalum mosaic virus”. With characteristic humour, he often notes, “You know, I actually only have two degrees to my name, a BSc and a PhD.”

Teaching Across Generations

When asked what it was like teaching generation after generation of students from millennials to Gen Z to early Gen Alpha Prof. Burger simply smiled and shrugged. “The labels never mattered”, he insisted. “Students are students.” they wanted to learn genetics. For him, that curiosity bridged every supposed generational divide.

One of his greatest joys was Genetics 244, an undergrad module he built entirely from scratch during his very first year (1997) in the department as a young academic. At the time, the module did not exist, and its creation marked his first real opportunity to shape how genetics would be taught to future cohorts. When he started, about40 students filled the lecture hall; today, the class sits at around 500. “It still astonishes me,” he said. The growth was never about prestige – it was affirmation that he had made the learning feel possible, accessible and exciting.

Yet the moments that meant the most to him came much later, often quietly, in the form of thank-you emails from former students. During our interview, he picked up one such email (the image below) and read it aloud. As he spoke, his voice softened and trembled ever so slightly. He paused, clearing his throat, clearly moved, though not quite to tears. “There is nothing more rewarding,” he said gently.

And of course, decades of teaching delivered its share of humour. One story he recalls with particular amusement is the day an UberEats courier walked straight into his lecture with a McDonald’s order  “right there, during class!” he laughed. The moment was so unexpected and absurd that a student captured it on TikTok, where the clip quickly gained 8 254 likes, and 447 shares (click here to view the video). It became one of many stories that entered his personal folklore.

Research: From Vineyard Viruses to Old-Vine Mysteries

One of the most defining eras of Prof. Burger’s research took shape at Stellenbosch University through a collaboration with the renowned Kanonkop Wine Estate. Rather than highlighting a problem, the partnership reflected Kanonkop’s forward-thinking commitment to understanding one of the wine industry’s oldest questions: why do old vines produce wines with such exceptional depth and character? It is a question many vineyards in Stellenbosch and across the world continue to explore.

This curiosity set the stage for a pioneering study that became a cornerstone of Prof. Burger’s career. Working alongside his PhD student  at that time (Dr Beatrix Coetzee) and collaborators, he helped generate one of the first comprehensive “viral maps” of a vineyard, a way of identifying the natural community of viruses that live quietly in vines and soils. As described in their publication, it was the first time a South African vineyard’s viral profile had been sequenced in such detail using advanced technology. Prof. Burger still recalls the moment they saw the results: “It was extraordinary,” he said, delighted by how quickly winemakers recognised the value of this new insight into vine health.

But the project didn’t stop at mapping. To understand how age influences flavour, the team compared the older, established vines (53 years old) with newly planted young vines (7 years old) growing right beside them under the same conditions. They collected leaves, stems and berries/grapes, studied how the plants developed over the season, and looked at the subtle biological differences between the two. One of the most striking findings was that the older vines ripened nearly two weeks later than the young vines, a small shift with potentially big implications for the layered, nuanced wines that old vineyards are celebrated for.

Through this collaboration, Kanonkop demonstrated the kind of curiosity and scientific openness that has long shaped its reputation: a willingness to invest in research that reveals, rather than hides, the quiet complexities of winemaking. And for Prof. Burger, it became a project that not only advanced the science of South African viticulture but also showed the power of partnership between industry and academia.

From Mentorship to Collaboration to Legacy of his lab

When Prof. Burger speaks about mentorship, his voice softens in a way that reveals just how deeply he valued it. “There is nothing more rewarding than supervising a student,” he said. Guiding them through uncertainty, watching them grow, and eventually stand confidently in their own scientific abilities was, for him, the true heart of academic life. His hope was always simple: that once they completed their degree in genetics, they would use it to do something meaningful. Many did, leading research teams, shaping national policy, and driving innovation across industry.

The moment that captured his legacy most clearly came on 12 November 2025. As he recounted it during this interview, his eyes filled and he paused, unable to hide the emotion. Without his knowledge, his former MSc and PhD students including post-doctorals and colleagues , some he had not seen in decades, had organised a surprise celebration in his honour. Several travelled long distances just to be there. When he walked into the room and saw all the faces of people he had once guided, he was overcome. “It was truly amazing,” he said quietly, wiping his eyes as he remembered it.

In that moment, it became clear that his greatest contribution was never a single experiment or publication. It was the people he had helped shape, and the scientists who now carry his influence into the world.

For Prof. Burger, collaboration was the lifeblood of his science. “One cannot progress in science without collaboration,” he said. Working with others not only strengthened the rigour of his research,it opened doors to new ideas, new techniques, and entire scientific worlds he might never have reached alone.

His career carried him across continents for workshops, conferences, and collaborations that often grew into lasting friendships. Among those he remembers most fondly are Prof. Assunta Bertaccini in Italy, ValerianDolja in the United States, and Prof. Giovanni Martelli of the University of Bari a towering figure in grapevine virology. He also spoke warmly of Prof. Marc Fuchs from Cornell University, whose expertise and partnership helped elevate the international standing of the Vitis group.

These were not merely professional connections; they were relationships built on trust, respect, and a shared love of discovery. “Science becomes better when done together,” he said a simple truth.

And perhaps nothing captures this better than the sprawling collection of lanyards in his office: badges from dozens of conferences, institutes, and countries. Each one marks a place he travelled, a talk he gave, a collaboration formed, a student met, a question asked.

 

When asked about the future of his research group, Prof. Burger responded with quiet certainty. There was no hesitation, only genuine pride in what the team had become. “I am excited to see where it will go,” he said, speaking with the ease of someone who has spent decades building not just a laboratory, but a scientific home.

What stood out most was his complete trust in the new leadership. He expressed deep confidence that those stepping into his place are capable, forward thinking, and ready to guide the group into its next chapter. “Such is the nature of science,” he reflected. “You work on discovery and impact, and when it is time to let go, you must do so with confidence.”

The Companions Who Shaped the Man Behind the Science

Behind every accomplished scientist stands a circle of support, and for Prof. Burger that support includes his companion Karin. She is central to this chapter of his life, and when he speaks of her his tone softens immediately. He describes her as “an amazing lady,” a phrase offered with unmistakable admiration. However his affection is just as evident when he speaks of his two sons. Having them, he says, was “a blessing,” and the pride he carries for them is unmistakable. His eldest son became a solar engineer working in sustainable energy technology, while his younger son pursued geochemistry and now works internationally for an exploration company in the USA. As he shares small stories about them, the ordinary details only a father remembers, a quiet joy settles into his voice. Their influence was never planned, yet it shaped him deeply, giving him perspective, resilience, and the grounding that only family can provide. As he reflects on them, he adds with heartfelt sincerity, “I am really honoured to have raised such wonderful sons together with my ex wife, who is also a strong academic.

Recognition From the University Community

Prof. Burger’s contributions have also been formally recognised within Stellenbosch University. He received the 2025 Chancellor’s Award for research, acknowledging the depth and quality of his work over many years. The department later hosted a warm farewell celebration (see photos below), offering an opportunity for colleagues and former students to thank him, share memories and enjoy the moment together before he steps into this next phase of his life.

Looking Back, Standing Present, Moving Forward

As your departmental scribe and as a former undergrade student in Prof. Burger’s Gen 244 class and now his colleague,I can say without hesitation that he was and remains an eclectic lecturer with a rare ability to connect across generations. Even now, as a colleague, that same calm and grounded presence endures. Nothing seems to ruffle him; he brings humour, humility and an ease that has long made him one of the department’s most memorable figures.

When asked what comes next, he answered with characteristic steadiness. “I am not disappearing,” he said. “I will still be connected, just in a different way.” Retirement for him is a shift rather than a departure: continued affiliation with the research environment, balanced with long awaited time for family, golf and the freedom academia seldom allows.

As our conversation ended, Prof. Burger shared a few final reflections on teaching, science and the journey ahead. You can watch his message in the video below

Composed by M. Le Roux

Genetics Department Marks 100 Years with Landmark Symposium

The Department of Genetics at Stellenbosch University proudly marked its centenary with a landmark full day symposium held at the Wallenberg Conference Centre at STIAS on 9 September 2025. The event brought together over 170 delegates, including academics, alumni, industry partners, and students, for a day of reflection, scientific exchange, and celebration.

The day began with the warm Stellenbosch sun falling across the venue as excited delegates arrived. The buzz of conversation was matched by the vibrant exhibitions of our three sponsors (Separation scientific sa (pty) ltd; Inqaba biotec; and Anatech). Guests collected their name tags and commemorative booklets; a beautifully designed keepsake capturing the department’s 100-year journey, before gathering in the auditorium for the opening session.

Session 1: Welcome and Legacy

The symposium opened with reflections on the department’s journey, from its earliest foundations to the era of precision genetics.   Dean Prof Danie Brink gave a memorable welcome and presented the new Head of Department, Prof Clint Rhode, with a symbolic token; a 118-year-old textbook, Principles of Breeding (1907). This book was originally held by Prof J.H. Neethling in 1925. The programme then continued with Professors L Warnich and JT Burger who traced the evolution of genetics research and applications across the last century, while Dr MS le Roux presented a visual retrospective of the department’s history.

During the first tea break, delegates enjoyed networking while engaging with student posters and catching a preview of the department’s new promotional video series, due for release later this year. With coffee in hand and the backdrop of the Stellenbosch mountains, conversations flowed easily and set the tone for the next session.

Session 2: Plant Genetics and Biotechnology

Talks in this session highlighted the department’s deep impact on plant science and agriculture. Dr Renée Prins honoured alumni contributions, while Mr WC Botes offered a unique perspective by showing how the department’s influence reaches back into the late 1800s. Prof H Maree explored plant virology, Dr M Campa presented on grapevine genetics in the Vitis Lab, and Prof AM Botha-Oberholster examined the evolutionary puzzle of the Russian wheat aphid. The session closed with Prof J Lloyd, who reflected on how plant biotechnology at Stellenbosch and within the Institute for Plant Breeding and Biotechnology (IPBB) has been rooted in genetics for decades.

Lunch was a highlight in itself, with carefully curated gourmet meals and exquisite desserts. Delegates,  from vegans to vegetarians and beyond were treated to dishes that matched the sophistication of the day, and enjoyed both indoors and outdoors in the vibrant setting.

Session 3: Genetics in Human Health and Disease

The afternoon turned towards health. Dr C Scott reflected on alumni contributions to genetic counselling, while Dr NW McGregor discussed genetics in understanding non-communicable diseases. Dr B Loedolff presented on biotechnology and entrepreneurship, and Ms M Engelbrecht reflected on the department’s teaching and learning journey. Industry partners from Separations showcased how genomics is being leveraged for future breakthroughs.

Session 4: Animal Genetics and Biodiversity

The final session celebrated a century of contributions in animal genetics. Prof C Rhode revisited the department’s pioneering role in the field, Dr B Van Asch explored beetle diversity, and Dr J Klein presented genome-based approaches to fisheries management and conservation.

Cocktail event

Despite the long day, the energy never waned. Delegates gathered for group photos before moving into the cocktail reception, where Stellenbosch wines, artisanal canapés, and lively conversation carried the celebration into the evening. Students, staff, alumni, and industry partners mingled freely, reflecting on the day’s talks while honouring the shared history of the department. A special highlight of the evening was the presentation of a commemorative plaque to the Department by Mr Nicolas Queisser, Managing Director: Sales and Marketing at Separations. This plaque, soon to be displayed at the department’s entrance, will serve as a lasting reminder of the symposium and of our 100-year milestone.

So what happens next:

The centenary journey doesn’t end here. In the coming weeks:

  1. The Department of Genetics will release two short highlight videos (about two minutes each) capturing the energy and spirit of the symposium.
  2. This will be followed by the launch of our academic video series, which will showing each academic in their teaching and research environments. In these short films, staff will share what they do, why it matters, and their vision for the future of genetics.

Think of it as both a behind-the-scenes glimpse into the people and passion that define our department, and a public invitation to see how Stellenbosch Genetics is shaping the next 100 years.

As your departmental scribe, it was remarkable to witness how the symposium placed our achievements in context. Over the past century, strong leadership and collaborative research have shaped the Department of Genetics into what it is today: a hub of innovation, teaching, and community. The Centenary Symposium was not only a celebration of the past but also a springboard for the future. From plant and animal genetics to human health and biotechnology, the department reaffirmed its role as a leader in advancing science and training the next generation of geneticists. We extend our sincere thanks to all sponsors, delegates, and especially the Symposium Planning Committee, whose tireless efforts made this event possible.

Composed by The Department Scribe

Celebrating a Century of Genetics: Symposium on the 9 September 2025

The Department of Genetics at Stellenbosch University is proud to announce its Centenary Symposium, at Stellenbosch University. This once-in-a-lifetime gathering will celebrate 100 years of excellence in genetics research, teaching, and innovation, bringing together academics, alumni, industry leaders, and students for a day of reflection, discovery, and future-focused dialogue. With RSVPs now closed, we are excited to welcome 170 confirmed delegates who will join us for this historic celebration.

Delegates can expect a full day of thought-provoking presentations  on  research from across the genetic sciences, personal journeys shared by alumni, and insights into how our department has evolved into one of only two independent genetics departments in South Africa. The programme will blend scientific sessions with history and storytelling, offering a rich perspective on both our past contributions and our ambitions for the future. Networking opportunities will be plentiful, with exhibitor stands from key industry partners, interactive poster sessions, and time to connect with colleagues and friends old and new.

The symposium will be hosted at the Wallenberg Research Centre @ STIAS in Stellenbosch, a world-class conference facility. Delegates can look forward to a seamless conference experience with modern, high-tech audiovisual facilities. The day will be punctuated with delicious refreshments, including arrival coffee, mid-morning snacks, a buffet lunch, and afternoon tea. Special attention will also be given to dietary needs, with options ranging from vegan and vegetarian to gluten-free and Halaal. A professional videographer/photographer will capture the entire event, ensuring that the spirit of the centenary is recorded for our archives, website, and official university media. Delegates are encouraged to dress smartly, as these images will form part of the permanent record of this milestone celebration.

We are especially proud to acknowledge Separation Scientific SA (Pty) Ltd and Inqaba Biotec as our lead sponsors for this centenary celebration. Their longstanding partnership with our department and their commitment to advancing genetics research have been instrumental in making this event possible. Alongside them, we are delighted to welcome Anatech Analytical Technology as an additional sponsor, further strengthening the industry’s support for this milestone occasion. Together, these sponsors ensure the symposium will be both impactful and memorable.

The celebrations will not end when the formal sessions conclude. Delegates are invited to join an after-hours cocktail event, where conversations will flow in a relaxed atmosphere and the centenary spirit will continue in style.

As your departmental scribe, I have had the privilege of experiencing this department from many angles, first as an undergraduate student, then as a postgraduate, later as a lecturer, and in that time, I have witnessed five brilliant heads of department, the growth of our institute from IPB to  IPBB, and the department’s continued rise as a hub of excellence. What an exciting time to be part of the Faculty of AgriSciences and to celebrate 100 years of Genetics at Stellenbosch.

Honours Students Step into Research with First Project Proposals

Friday, 8 August marked a significant milestone for our 2025 Honours students in the Department of Genetics and the  the Institute for Plant Biotechnology and breeding  (IPBB) programme. After completing an intense six-month series of theory modules, they took their first bold step into the laboratory phase of their academic journey, presenting their project proposals to staff, postdoctoral fellows, and fellow students.

The Genetics and IPBB Honours groups presented  their work in different venues:

In the Genetics Department’s Seminar Room, the flash presentations  spanned an impressive range of topics, from important crops such as grapevine, wheat, raspberries and detection protocols in Candidatus, to aquaculture research on dusky kob, and studies on other species like guitarfish. Presentations also covered human genetics,  including the pathogenesis of ageing and Obsessive-compulsive disorder (OCD)  and animal genetics, featuring work on snakes such as the Gaboon viper.

Meanwhile, in the Natural Sciences Building, the IPBB students took a different approach. Standing beside their posters like custodians of their research, they engaged curious audience members who stopped by. Instead of timed flash talks, they offered concise, on-the-spot explanations, creating an interactive and conversational atmosphere around their work. Their research topics were just as diverse,  from alternative protein sources for food, beans, and marula oil, to salinity stress in Thinopyrum distichum, phenomics, sugarcane, potatoes, and coffee.

I attended both venues, and both buzzed with energy as staff and postdocs circulated, posing challenging questions and offering guidance to sharpen research objectives. Despite the differences in format between IPBB and Genetics, one thing was certain: the research was solid, and the creativity in both scientific ideas and poster designs was evident.

This is where the real work begins,” one staff member remarked. “They’ve done the groundwork ,  now they get to apply it, experiment, and  discover.”

As your departmental scribe, I can’t help but reflect on my own Honours journey at IPBB. Thus can I say; In science, the pursuit is rarely a straight path to the “next big discovery.” More often, it is a gradual awakening,  a process of finding your rhythm, learning to think with both precision and creativity, and allowing the questions to shape you as much as you shape the answers.

The months ahead will test patience and persistence with long hours in the lab, relentless data analysis, and challenges that seem insurmountable. Yet, within those very moments lies the quiet thrill of discovery  not just of new knowledge, but of the scientist you are becoming!

Goodluck!
Composed by The Department Scribe – M. Le Roux

Annual BSc Honours Interdepartmental Recruitment Event

Written by Dr Christel van der Vyver
A spirit of collaboration and scientific curiosity filled the air as approximately 130 third-year BSc students gathered for the annual BSc Honours Interdepartmental Recruitment Event on Friday, 16 May. The event was hosted by the Departments of Genetics, Microbiology and Biochemistry on Stellenbosch campus and brought together students interested in the different fields of Life Sciences, including Medical Virology and Microbiology, and Molecular Biology, postgraduate students, and academic staff members from the various Departments.

The event, which aimed to guide students toward postgraduate opportunities and research interests, served as a unique platform for third-year undergraduates to explore potential Honours pathways and immerse themselves in the exciting research culture of their future departments. Information regarding program structure, the online application process, application deadlines, prerequisite requirements, bursary opportunities etc, was communicated to the attendees.

What set this year’s event apart was direct engagement with postgraduate students currently pursuing Honours, MSc and PhD degrees within the various Departments. These postgraduate students led lab tours and introduced participants to the various research groups within the Departments. Promotional stalls were set upby the postgraduate, showcasing some ongoing Departmental research, which gave the attendees an inside look at the research activities and programs within each department. Many also shared personal anecdotes and advice on navigating the transition from undergraduate to postgraduate studies.

“The goal is to give students real insight, not just into what each field entails academically, but what it feels like to be part of a research team,” said Drs. Christell van der Vyver and Justin Lashbrook, event coordinators from the Department of Genetics. “This kind of exposure is invaluable when students are deciding where their passion and skills best align.”

The interdepartmental nature of the event encouraged cross-disciplinary exploration. Attending students also had the opportunity, while enjoying some refreshments and finger food, to interact with academic staff members in an informal setting, which could address questions and provide guidance regarding academic program choices.

As the research landscape continues to evolve, events like this are instrumental in shaping the next generation of scientists, not just by informing them about their choices but by inspiring them to take the first confident step into a scientific career.