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The impact of cereal killers on food security

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

NRF commits R30-million for research at the UFS

2007-02-20

The National Research Foundation (NRF) has committed approximately R30-million for various research projects at the University of the Free State (UFS).

According to Prof Frans Swanepoel, Director of Research Development at the UFS, the NRF has also approved all eight research niche areas that were submitted to the NRF, the highest number approved at any university in the country.

Prof Swanepoel said the 24 research projects for which funding had been obtained from the NRF ranged from traditional healing and HIV/Aids/tuberculosis management, practices of the paediatric anti-retroviral programme at the UFS to nano-materials synthesis and characterisation.

He said the eight research niche areas were part of an initiative at the UFS to establish strategic clusters of academic and research excellence.

“There will be six strategic academic clusters at the UFS and the eight NRF-approved research niche areas will form part of them,” Prof Swanepoel said.

The six strategic clusters are:

1. Water management in water-scarce areas

2. New frontiers in poverty reduction and sustainable development

3. Social transformation in diverse societies

4. Ecologically sound value chains for agricultural commodities

5. Materials and nano sciences

6. Advanced bio-molecular research

Prof Swanepoel said that the UFS had also submitted five proposals in terms of an NRF initiative to establish research chairs at South African universities.

“Linked to our intention to establish six strategic academic clusters, five proposals for the South African Research Chair Initiative (SARCHi) were submitted. All five pre-proposals were accepted in the first round of screening, and successful candidates have been invited to submit full proposals by the end of February,” he said.

The proposed research chairs are:

Petro- and organometallic chemistry

Biocatalytic and biomimetic oxidation-reduction systems

Nano-solid state lighting

People’s health and well-being

Water management

Speaking at the official opening of the university earlier this month, the Rector and Vice-Chancellor of the UFS, Prof Frederick Fourie, said: “The cluster initiative represents a strategic initiative to focus our energies in a few key areas, investing in them so that the UFS can become an international leader in those fields.”

“A medium sized university such as the UFS with relatively limited human, physical and financial resources has to achieve this kind of ‘critical mass’ and synergy to establish itself in terms of its core functions of teaching/learning, research and community engagement,” said Prof Fourie.

Media release

Issued by: Lacea Loader

Media Representative

Tel: 051 401 2584

Cell: 083 645 2454

E-mail: loaderl@ufs.ac.za

20 February 2007

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