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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

An exceptional year at Kovsies — one of the most successful years in academic achievement
2014-12-04

 

The University of the Free State (UFS) had an exceptional year, with many staff members and students performing both nationally and internationally. Considerable progress has also been made in improving the academic standards of the university.

“So far, this has been one of the most successful years in academic achievement. The UFS now has the highest academic pass rate in years, partly as a result of the admission standards which were raised four years ago.

“We now also have the highest rate of research publications, one of the highest publication figures for scholarly books in history, three Mandela Rhodes scholars and several international communication awards”, says Prof Jonathan Jansen, Vice-Chancellor and Rector of the UFS.

“The university now attracts top professors from all over the country and other parts of the world and for the first time in many years, two researchers received A-ratings from the National Research Foundation (NRF). This is the first time in the history of the UFS that two A-ratings were awarded simultaneously. The most researchers ever were rated by the NRF this year. After the constant turmoil of a few years ago, Kovsies has now become one of the most stable campuses in South Africa,” Prof Jansen says.

The impartial findings of a recent survey of UFS stakeholders showed that our values are endorsed by 92%; 86% agrees with our vision; 81% agree with our goals; 77% agree with our transformation; 78% believe that we are inclusive; and 78% applauded our overall reputation index. “These figures are very different from a few years ago when the university experienced a crisis,” he says.
 
According to Prof Jansen, the UFS’s financial situation is one of the most stable of all universities in South Africa, with a strong balance sheet and growing financial reserves – way better than before. This is exactly the reason why the UFS received confirmation from the Independent Regulatory Board of Auditors (IRBA) this year that we complied with international standards of reporting for the financial year which ended on 31 December 2013.

“I am also pleased to report that the crisis in the delivery of health services in the Free State province has been resolved due to collaboration between the UFS Management (including the Dean: Health Sciences and Head of the School of Medicine), the Department of Health and the Premier, Mr Ace Magashule. Although the loss of skilled personnel is still a concern, the Dean and Head of the School of Medicine are recreating the Health Services Platform at Universitas Hospital. However, the academic training of no undergraduate medical student or any student in the Health Sciences was influenced by the crisis in the Universitas and Pelonomi Hospitals”, he says.

The UFS is regarded around the world as a model of transformation and reconciliation in the student body. The recent SRC elections are only the most visible example of how far we have come in terms of leadership diversity. “Not a week goes by in which other universities, nationally and abroad, do not come to Kovsies to consult with us on how they can learn from us and deepen their own transformations, especially among students”, Prof Jansen says.

“The UFS will continue its model of inclusive transformation which provides opportunities for study and for employment for all South Africans, including international students and colleagues. We remain committed to our parallel-medium instruction in which Afrikaans remains a language of instruction; we are in fact the only medical school in the country that offers education and training in Afrikaans and not only English. We provide bursaries and overseas study opportunities to all our students, irrespective of race. And our ‘future professors’ programme is richly diverse as we seek the academic stars of the future. But we remain steadfast in our goal of making the UFS a top world university in its academic ambitions and its human commitments,” Prof Jansen says.

 

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