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09 September 2025 | Story Martinette Brits | Photo Stephen Collett
Prof Botma Visser
Prof Botma Visser delivered his inaugural lecture at the University of the Free State, highlighting nearly two decades of research on wheat rust and global food security.

Safeguarding one of the world’s most vital staple foods was at the heart of the inaugural lecture delivered by Prof Botma Visser, Professor in the Department of Plant Sciences at the University of the Free State (UFS), on Wednesday 3 September 2025. Prof Visser shared insights from nearly two decades of research into wheat rust – a devastating crop disease that threatens both South Africa’s harvests and global food security.

“Wheat production in South Africa is threatened by three fungal pathogens that cause rust disease on the crop. Understanding the factors that contribute to virulence on locally grown cultivars is crucial to ensure continued wheat production,” said Prof Visser.

 

The fight against evolving wheat rusts

For the past 17 years, Prof Visser’s research has focused on the genetic structure of rust populations and the risks they pose to food security. His work has shown that these populations are dynamic and constantly changing due to genetic mutations within existing races, as well as the introduction of new races into South Africa.

“Computer modelling showed that rust can spread over vast distances by prevailing winds. During the 20th Century, at least four Southern African stem rust races managed to move across the Indian Ocean from Southern Africa to Australia. South Africa, in turn, received multiple new races from mid-Africa across Zambia and Zimbabwe, without any means of stopping these introductions,” he explained.

To respond to this challenge, his team recently implemented MARPLE (Mobile And Real-time Plant disEase) diagnostics using fourth-generation nanopore sequencing technology. This approach allows the rapid characterisation of fungal isolates, specifically targeting genes linked to fungicide resistance and virulence.

“This work,” Prof Visser noted, “is part of an effort to safeguard global wheat production.”

His research is a collaborative effort with Prof Willem Boshoff (Department of Plant Sciences, UFS) and Dr Tarekegn Terefe (Agricultural Research Council – Small Grain, Bethlehem). Together, their work has positioned the UFS as an internationally recognised centre of excellence in wheat rust research.

 

About Prof Botma Visser

Prof Botma Visser obtained his BSc in Botany and Microbiology (1988), BSc Honours in Microbiology (1989), and MSc in Botany (1993) at the University of the Free State, where he also completed his PhD in Botany in 2004.

His career spans more than 18 years of research into wheat rust pathogens, combining annual surveys, race pathotyping, molecular genetics, and cutting-edge sequencing technologies. His expertise has not only advanced understanding of rust population dynamics in South Africa but also contributed to global collaborative studies on crop disease.

News Archive

Visiting UK professor presents research project at CRHED
2017-04-12

Description: ' AM Bathmaker CRHED  Tags: AM Bathmaker CRHED

Prof Ann-Marie Bathmaker, University of Birmingham,
during her presentation at the UFS.

Photo: Eugene Seegers

Paired Peers: Pathways to social mobility—Investing in the future? Moving through HE and into employment was recently presented to staff and postdoctoral students by Prof Ann-Marie Bathmaker, from the University of Birmingham, during her visit to South Africa while working on the Miratho Research Project with CRHED. Prof Bathmaker’s research interest particularly focuses on issues of equity, social mobility, and social class inequalities. Her presentation, the second in the Higher Education Research Seminar series presented by CRHED, was based on research resulting from a seven-year project in England.

In the UK, higher education (HE) is considered a key route to social mobility. Interest has grown in graduate destinations, particularly the prospects and obstacles faced by graduates from different social backgrounds. Paired Peers followed 70 students throughout their undergraduate studies and into the working world.

The project explored the processes of social mobility, highlighting different orientations and practices towards investing in the future, which ranged from investing in the present to cultural entrepreneurship for the future.

Participants were selected from two universities in Bristol, England. The research team focused on three key themes: “Getting In” (access to HE), “Getting On” (financial limitations, friendships, accommodation), and “Getting Out” (holiday work, internships, and finding suitable graduate employment).

Prof Bathmaker was able to highlight key research findings, many of which resonated with those attending. From the question-and-answer session, it was clear that many issues regarding inclusivity, whether across gender, ethnic, or language barriers, find their parallels in the South African context and can be of benefit to higher education practitioners here.

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