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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

Applications for the Vice-Chancellor's Prestige Programme for 2013/2014 now open
2012-12-06

This highly prestigious programme, led by the Vice-Chancellor of the University of the Free State, seeks to identify, develop and promote the next cohort of the most promising and talented UFS academic members of staff who obtained a doctoral degree within the last five years. These are young scholars who have chosen academic careers and who are focused and determined to become senior academics in their respective disciplines.

Once identified, these scholars will be put through an intensive programme of academic and scholarship support that includes an advanced residential programme, exposure to leading scholars, intensive reading and writing programmes, high-level seminar participation and presentation, nuanced publication schedules and personal mentoring and advice.

The selection process is highly competitive, and aimed at those young scholars with the potential to obtain upper-level ratings (Y1 and P).  The selection criteria include the following:(1)

1. Recently obtained a PhD degree.
2. Evidence of an active publication record.
3. Early recognition of scholarly work, e.g. successful funding/grant applications and academic awards.
4. The early development of a post-doctoral intellectual project that shows evidence of scholarly “potential” (defined by the NRF Y-category).
5. Indication of the young scholar’s understanding of what their envisaged postdoctoral endeavours will contribute to the body of knowledge.
 
This period of support will run over a cycle of two years after which a new intake of next generation professors will be selected.
 
While this cohort will be selected for an intensive programme, ongoing development and support of all young scholars will continue. The selected scholars will reflect a balance of young academics from the humanities (broadly defined, including education, law, theology and the social sciences) and the natural sciences (broadly defined, including the agricultural and health sciences).
 
Call for Applications
This is a call for applications for the Vice-Chancellor’s Prestige Programme for 2013/2014. Candidates are invited to submit applications. No nomination is required, but deans and heads of department will also be asked to invite young scholars to apply.  Complete applications are due by Monday 21 January 2013. A full application will include the following documentation:

1. A complete curriculum vitae of the candidate.
2. A complete exercise of intent comprising the following:
2.1   Select two journal articles (copies of which to accompany the application) in the area you have identified for your intellectual focus post PhD. These articles have to be selected from journals of international standing in your field.
2.2   The articles need to be summarised (250 words each), and
2.3   Two questions have to be identified that you would want to pursue in relation to your intended project. 
2.4   This is followed by a brief, critical summary of a hundred lines maximum to indicate how these articles inform, integrate or provoke your planned future research.

Submission and contact address
A paper copy of the application must be submitted to the Vice-Chancellor’s secretary, Ms Melissa Coetzee, in the Main Building by 16:00 on Monday 21 January 2013 and an electronic copy of your entire application to the administrative assistant, Mr Albert Nell:nella@ufs.ac.za. You will be contacted to acknowledge receipt. Candidates will be informed of the outcome in February. Further information on the Vice-Chancellor’s Prestige Scholar Programme can be directed at any of the following co-directors (in alphabetical order):

Prof Jackie du Toit, Prof Neil Roos, Prof Aldo Stroebel or Prof Corli Witthuhn.
 
[1] The VC reserves the right to nominate young scholars to the programme and also to invite scholars to a panel interview to evaluate personal qualities, professional commitment and academic ambition.

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