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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

Rag teamwork leads to Armentum, Emily's float

2016-02-04

Rag video clip

Perhaps the residences Armentum and Emily Hobhouse were thrown into the deep end, but they still wanted to prove a point.

This is according to Hanko Minnaar, Residence Committee member for Rag at Armentum, shortly after the residences were announced as overall float winners of the University of the Free State (UFS).

According to Minnaar, Emily Hobhouse and Armentum overcame the challenge of building a float as a two-residence team, while most of the other hostels were in teams of three.

On 30 January 2016, after about two weeks of hard work and sweat, the residence twosome was named the winner at the Bloemfontein Campus.

“I am very proud. We couldn't have asked for more,” Minnaar said, after the residences Armentum and Emily Hobhouse celebrated their victory with house songs. “Anything is possible through teamwork.”

Tom and Jerry, Olaf and a Steri Stumpie

The theme for this year was “Cartoons, Animation, and Children's Snacks”. Among other items, Armentum and Emily Hobhouse had Tom and Jerry, Olaf from Frozen, a Steri Stumpie, and a box of Astros on their float.

Photo: Charl Devenish

“We thought hard about what we wanted,” Minnaar said.

“We also asked some children, and they said that Tom and Jerry is a favourite, and Olaf has always been a winner as well. And Steri Stumpies, of course. Who doesn't like Steri Stumpies?” The residences Marjolein, Veritas, and Akasia were second overall, with Karee, Vergeet-My-Nie, and Sonnedou third.

Colourful processions

The events of the day started off with a morning procession from the Pelonomi Hospital to the Twin City Mall in Heidedal, where students and the community celebrated together, and meals were distributed.

The evening procession, from the Tempe robot in Nelson Mandela Drive to the Old Grey Sports Grounds, was greeted by hordes of spectators along the way.

Artists and Co captivate audience

In the evening, music lovers were entertained at Old Grey Sports Grounds by the legendary artists Vusi Mahlasela, the talented Karen Zoid, and an energetic Francois van Coke.

Local bands, Rise in Red and Simple Stories, added to the excitement. To top it all off, a special laser show made for a colourful visual bonus, coupled with great sound.

2016 Float results
Rag photo gallery

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