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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

President of Spelman College delivered Second Annual Reconciliation Lecture
2013-08-12

 

Dr Beverly Daniel Tatum
12 August 2013

Dr Beverly Tatum lecture (pdf)
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The United States have much to learn from South Africa about reconciliation. This is according to Dr Beverly Daniel Tatum, president of Spelman College, the oldest college for African American women in the US. Delivering the Second Annual Reconciliation Lecture on our Bloemfontein Campus, Dr Tatum –an internationally-acclaimed educator and expert on race relations –said five years after the US elected its first black president, the country still finds it difficult to make peace with the painful truth of its past.

Drawing inspiration from a speech made by former president Nelson Mandela at the adoption of the South African constitution in 1996, Dr Tatum said it requires courage to engage in a meaningful way with those we have been socialised to mistrust.

Dr Tatum highlighted the shooting of the US teenager Trayvon Martin, who was killed in Florida in an incident many attributed to racial profiling. The unarmed Martin, while out walking in the evening to buy a snack, was accosted and shot by neighbourhood watchman George Zimmerman who suspected him to be a potential thief. 

“How do we move beyond stereotypes to more authentic knowledge of one another?” she posed the question to a packed Reitz Hall in the Centenary Complex. 

Dr Tatum, author of the critically-acclaimed books, Can We Talk about Race? and Why Are All the Black Kids Sitting Together in the Cafeteria? said we have to be brave enough to have our assumptions challenged. 

“If we want a better society, one characterised by strength, trust and unity, we must interrupt the cycle and there is no better place to do it than at a university like this one, where the next generation of leaders is being prepared. But it requires intentionality. It takes practice.”

During her two-day visit, she also met with postgraduate students from the Faculty of Education to discuss social cohesion at schools. She also took part in a roundtable discussion with educators from the UFS and other universities, deliberating the topicLeading with/for/against differences on university campuses.

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