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Revolutionising wheat: Developing cultivars that maintain their quality in heat and drought

28 April 2023 | Story Leonie Bolleurs | Photo Supplied

UFS PhD student and food scientist Schae-Lee Olckers’ research could contribute to a stable supply of good quality wheat and bread, even in the face of climate change.

Follow your passion in order to find your purpose. This is the mantra of food scientist and University of the Free State (UFS) PhD student Schae-Lee Olckers, whose research is set to improve wheat quality by identifying which types of wheat are better able to tolerate stress, and which proteins are most important for producing high-quality bread.

“By grasping this, it is possible to ensure that we continue to have a stable supply of good quality wheat and bread, even in the face of climate change,” says Olckers, who believes wheat is one of the most important food grains in the human diet, and one of the most important staple cereal crops in the world.

Her PhD study, ‘The influence of abiotic stress on gluten protein and baking quality in bread wheat’, under the supervision of Dr Angie van Biljon and Prof Maryke Labuschagne in the Department of Plant Sciences, and Prof Garry Osthoff in the Department of Microbiology and Biochemistry, is investigating how different levels of heat and drought stress – mostly due to climate change – affect the gluten protein composition of high-yield bread wheat.

Olckers is a food scientist at StartWell Foods (Pty) Ltd, a non-profit organisation that produces high-quality extrusion products for feeding schemes around the country. The products help to eliminate stunted growth among children.

Improving wheat breeding programmes

This research could help us find ways to adapt to climate change and continue to produce high-quality wheat and bread for people around the world. – Schae-Lee Olckers

Her research focuses on examining different types of wheat and investigating how proteins are affected by stressors like heat and drought, to understand how these stressors impact the quality of bread. She uses new proteomic methods to look at the different proteins in the wheat flour, to gain a better appreciation of how gluten proteins react to stress.

In this study Olckers is able to see how the proteins change in the various wheat cultivars, helping us to understand how the different types of wheat perform in baking, and how the proteins affect the final product.

She collaborates with the International Maize and Wheat Improvement Center (CIMMYT) in Mexico, that releases new wheat cultivars for developing countries. Their aim is to develop wheat cultivars that maintain their quality in different environments. To investigate the performance and characteristics of the seeds, both in the field and in the laboratory, CIMMYT did the field trials, quality assessment, and supplied the seeds for high-performance liquid chromatography (HPLC) and proteomics analysis.

Finding ways to adapt to climate change

She believes that understanding how these stressors impact the production of bread-baking quality in wheat will help scientists gain important insights into how climate change affects our food supply.

“Taking into consideration the current and projected intensifying heat and water deficit stresses, it is crucial to improve the understanding of these phenomena in order to implement new breeding strategies for sustainable wheat quality. This research could help us find ways to adapt to climate change and continue to produce high-quality wheat and bread for people around the world,” Olckers says.

News Archive

UFS first to mechanise agricultural technique

2006-05-09

Small farmers from Thaba `Nchu were the biggest group attending the farmers day at the UFS Paradys experimental farm. From the left are Mr David Motlhale (a small farmer from Thaba 'Nchu), Prof Leon van Rensburg (lecturer at the UFS Department of Soil, Crop and Climate Sciences and project leader), Mr Nhlonipho Nhlabatsi (Agricultural Research Council, Glen), Ms Meisie Mthethwa (small farmer from Bloemspruit). In front is Mr Patrick Molatodi (chairperson of the Tswelopele Small Farmer Association).

Some of the participants of the farmers day at the UFS Paradys experimental farm were from the left Prof Leon van Rensburg (lecturer at the UFS Department of Soil, Crop and Climate Sciences and project leader, Mr Patrick Molatodi (chairperson of the Tswelopele Small Farmers Association) and Prof Herman van Schalkwyk (Dean: UFS Faculty of Natural and Agricultural Sciences).

UFS first tertiary institution in world to mechanise agricultural technique
The University of the Free State (UFS) is the first tertiary institution in the world to mechanise the in-field rain water harvesting technique on a commercial scale.

The technique was recently demonstrated to about 100 small farmers at the UFS Paradys experimental farm outside Bloemfontein.

“With this technique rain water is channeled to the plant and in this way food security is increased. The advantage of the technique for commercial farmers lies in the reduced cultivation of land. Small farmers will benefit from this because they can now move out into the fields and away from farming in their back yards,” says Prof Leon van Rensburg, lecturer at the UFS Department of Soil, Crop and Climate Sciences and project leader.

Rain water harvesting is an antique concept that was used by communities before the birth of Christ. In South Africa the technique is mainly used in the plots of small farmers where they make surface structures by hand.

"The technique is also used for the first time by the UFS on commercial scale by means of the cultivation of a summer crop on 100 ha at the Paradys experimental farm,” says Prof Leon van Rensburg,

Of the farmers who attended the farmers day most represented about 42 rural communities in the vicinity of Thaba ‘Nchu. A group of seven from KwaZulu-Natal also attended the proceedings. These small farmers can for example apply this technique successfully on the 250-300 ha communal land that is available in the Thaba ‘Nchu area.

The project is funded by the UFS and the National Research Foundation (NRF) and the farmers’ day was funded by the Water Research Commission.

Media release
Issued by: Lacea Loader
Media Representative
Tel: (051) 401-2584
Cell: 083 645 2454
E-mail: loaderl.stg@mail.uovs.ac.za
9 May 2006

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