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25 March 2022 | Story Leonie Bolleurs | Photo Charl Devenish
Prof Liezel Herselman Inuagural Lecture
At the inaugural lecture were from the left: Prof Danie Vermeulen, Dean of the Faculty of Natural and Agricultural Sciences, Prof Liezel Herselman, Dr Adré Minnaar-Ontong, Senior Lecturer in the Department of Plant Sciences and Subject Head of Plant Breeding, and Dr Molapo Qhobela, Vice-Rector: Institutional Change, Strategic Partnerships and Societal Impact.

Prof Liezel Herselman, Academic Head of the Department of Plant Sciences at the University of the Free State (UFS),) delivered her inaugural lecture on the Bloemfontein Campus this week (24 March 2022). The theme of the lecture was the ongoing battle against destructive cereal killers. 

With 28 years of extensive experience as a researcher, her work focuses on marker-assisted disease resistance breeding in wheat within a South African context. When she joined the UFS in 2004, Prof Herselman decided to apply her research expertise in marker-assisted breeding to the problems faced by wheat producers in the Free State and Northern Cape. The Free State is one of the major dryland wheat production areas in South Africa, while irrigation wheat is produced along the major rivers in the Northern Cape. 

Protection against fungal diseases

Concentrating specifically on Fusarium head blight (or wheat scab) and three rust diseases – leaf rust, stem rust, and stripe rust – she has done work to provide wheat plants with ‘tools’ to protect themselves against these fungal diseases.

According to Prof Herselman, there are many genes available in different wheat genotypes and related grass species that provide excellent protection against various races of these diseases. “Some of these genes provide protection or resistance from the seedling stage, while others provide resistance at the adult plant stage. We are thus aiming to combine as many of these genes as possible into a single wheat cultivar, without compromising yield and bread-making quality.”

She says the genes are combined by making crosses between resistant and susceptible cultivars or lines. Conventionally, through a time-consuming process, the incorporation of these genes is tested in the greenhouse and field by infecting plants with the disease to see which plants are resistant and which are not.

They can, however, follow the transfer of these genes to newly developed lines by applying molecular markers. Prof Herselman explains: “A molecular marker is a genomic fragment linked to the gene, which we can follow in the offspring we create from the crosses using different DNA techniques in the laboratory. This enables us to select new wheat lines that contain the highest number of resistance genes. The identified best lines are then used in further crosses and/or released as pre-breeding lines to commercial wheat breeding companies.”

Impact on food security

Her research has an impact on society by providing food security to both commercial and small-scale producers, as well as the end users of wheat (people buying bread and other wheat products). As researcher, it is also important for her to send out students to the workplace who can continue with this task in future.

Prof Herselman believes that when cultivars with fungal-disease tolerance or resistance are released and used by producers, it not only reduces the cost of spraying against diseases, but also increases yields by protecting the crop against fungal diseases. “We live in a world where the population is increasing daily, but land available for agriculture is not increasing and some areas are even lost due to urban development. Increasing yield in available production areas will thus have a positive impact on food security,” she says.

Besides contributing to the country’s food security, she takes pleasure in every aspect of her work. Although she misses the hands-on part of the work as academic head of the department and getting her hands dirty, she still enjoys managing the different research projects (from the conceptualisation phase to data analysis and publishing of results). The part she loves the most is to see the growth in her postgraduate students – from the moment they enter the laboratory for the first time until the day they walk out of the laboratory with their degrees. 

“It adds purpose to my life knowing that I have made a difference in a student’s life and equipped him or her with the necessary tools to be successful in the marketplace. Being able to share your knowledge is a gift, but with that gift comes a lot of responsibility as well. I am, however, up for the challenge,” concludes Prof Herselman. 

News Archive

Prof. Dingie Janse van Rensburg promoted to Outstanding Professor
2007-11-19

The University of the Free State (UFS) is pleased to announce that Prof. Dingie Janse van Rensburg, Director of the Centre for Health Systems Research and Development has been promoted to Outstanding Professor.

In 1991 the Executive Committee of the Council introduced the category of Outstanding Professor to give recognition to a small group of outstanding academics. Not many academics at the UFS received this status since then.

Prof. Janse van Rensburg has been working at the UFS for 37 years and played a big role in establishing a culture of scientific publication among young and upcoming researchers.

Prof. Janse van Rensburg enjoys extensive national and international recognition as researcher and research manager. He delivered various national and international papers and is involved in a variety of international research projects – some of which were initiated by him. He succeeded in involving a variety of foreign researchers in long term research projects.

In 1993 he established an entrepreneurial research and development centre, which he has sustained for more than 13 years. The centre enjoys recognition nationally as well as internationally as well as credibility in the eyes of the international donor community, within government’s health sphere as well as in peer academic circles.

Prof. Janse van Rensburg has for several years been a grant holder of both the National Research Foundation and the Medical Research Council for research projects on Tuberculosis and HIV/Aids.

During his career at the UFS Prof. Janse van Rensburg received several merit awards and commendations from the UFS and other institutions. These include the Stals Prize in 1993 from the Suid-Afrikaanse Akademie vir Wetenskap en Kuns, a Council Medal from the UFS in 2003, the UFS Centenary Medal in 2004, an award from the Department of Health in 2004 for excellence and continued support of this department, a promotion to Senior Professor from the UFS in 2005 and the Free State Premier’s Excellence Award Gold category in 2006 for excellence in research and development.

Media Release
Issued by: Lacea Loader
Assistant Director: Media Liaison
Tel: 051 401 2584
Cell: 083 645 2454
E-mail: loaderl.stg@ufs.ac.za  
19 November 2007
 

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