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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

Prestigious Helgaard Steyn Prize to be awarded to UFS composer
2010-11-08

 Hans Huyssen.

The composer Hans Huyssen, affiliated with the Department of Music at the University of the Free State (UFS), is to be the current recipient of the prestigious 2010 Helgaard Steyn Prize, the prize-winning work being Huyssen’s Proteus Variations (2006).Annually this award is administered and presented to a selected composer, painter, author, or sculptor by the Universities of the Free State and the North-West on a rotating basis. The judges for this year’s prize were Prof. Bertha Spies, Research Fellow, North-West University, and Professor Extraordinary, University of Pretoria, and Mr Noel Stockton, Senior Lecturer at the University of the Free State.

Hans Huyssen’s musical activities encompass the diverse poles of early and contemporary Western and African music, often in an attempt to assimilate the essential qualities from all these fields. His intense focus on contextuality suggests that he approaches music as a profoundly social force which has a particular role to play in our ‘new’ diversified South African society.

The Proteus Variations were commissioned by the Deutsche Welle Radio for the South African National Youth Orchestra 2006, and were premiered at the Beethoven Bonn Festival during 2006. These variations are described by the composer as “a musical representation of South Africa’s manifold Proteaceae”, named for the Greek god Proteus who, at will, was capable of assuming a spectrum of shapes and appearances. As the composer states: “It is worth noticing that a Protea is South Africa’s national flower. What could be more appropriate in providing a key to an opposite perception and understanding of the country’s diverse cultural expressions? In this regard it is my hope that the Proteus Variations may contribute a little to the wide scope of cultural responses necessary to begin to do justice to the extremely rich tapestry of our immediate cultural and natural surroundings”.

The prize of R170 000 will be awarded to Hans Huyssen by a representative of ABSA Trust, who is one of the trustees of the Helgaard Steyn Trust, in Bloemfontein on 8 November 2010.

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