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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

UFS serious about safe campuses

2011-02-09

Mr Willie Frankim, Head of Protection Services at the UFS, in the new control room on the Main Campus.
- Photo: Dries Myburgh

The University of the Free State (UFS) officially launched its security control room recently. This new addition to the university's infrastructure, which was implemented in December 2010, has already made a contribution to the combating of crime at the UFS.

The decrease in crime statistics for January this year (5 cases), in comparison to the statistics of January 2010 (51 cases) is proof that the UFS’s new approach to combating crime on campus has an impact.

According to Prof. Niel Viljoen, Vice-Rector: Operations, the safety of students, lecturers and staff of the UFS is of the utmost importancet. For this reason, it is continuously reflected on about what can be done to improve the levels of safety for the respective campuses.

Apart from the upgraded security control room, from where, amongst others, residences, pedestrian routes, campus buildings, parking areas, entrances at gates and computer rooms at residences are observed, a number of measures have been set in place to improve the task of combating crime.

These measures include:

- Security cameras in front of all the women’s residences. The UFS is in the process of also installing
security cameras in front of the men’s residences.

- Shrubs and trees that caused obstruction in front of cameras have been pruned.

- Security officers patrol the pedestrian routes as well as the Red Square on foot from 06:00-22:00.

- A security officer has been appointed at each residence to be on duty from 18:00 to 06:00
at the residence.

- Two vehicles patrol the Main Campus on a 24-hour basis.

- The UFS is in die process to install alarms, which will be linked to the central security control room,
in all buildings.

- In certain buildings panic buttons have been installed in strategic places.

- Where possible, better entrance control to building, especially office blocks, has been implemented.

-       Better management and integration of the security workers who are contracted from outside.
        More security workers have also been appointed to do duty at each residence as well as on the
        pedestrian routes (during the hours indicated).

- A survey has once again been done of all “dark spots” on the campus and better lighting is
currently being installed.

The reduced reaction times are a direct result of the operational process between security staff in the control room with met security staff that patrols the campus on foot and by vehicle

Media Release
09 February 2011
Issued by: Lacea Loader
Director: Strategic Communication (actg)
Tel: 051 401 2584
Cell: 083 645 2454
E-mail: news@ufs.ac.za

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