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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

Many changes for Shimlas, says new captain

2016-01-25

Description: 2016 Shimla Neil Claassen Tags: 2016 Shimla Neil Claassen
The versatile forward, Neil Claassen, will lead the Shimlas onto the field in the 2016 Varsity Cup. Photo: Johan Roux.

The University of the Free State (UFS) has a new group of rugby players, a new head coach, and a new captain.

This is how the Shimla skipper, Neil Claassen, summed up his team's approach to the 2016 Varsity Cup.

Although the UFS will start the tournament as defending champions, the 23-year-old Claassen believes that much has changed since 2015.

One of which is his appointment. The flanker, who can play lock as well, was recently appointed as Varsity Cup captain in his third series.

The former Springbok flanker, Hendro Scholtz, took over as head coach from Franco Smith, who is now the Cheetahs trainer. Mac Masina, former centre for the Lions, is a new assistant coach.

New year with more pressure

Because of all the changes, Claassen feels that the Shimlas will need a different approach to the 2016 tournament.

“There will definitely be more attention on us (as champions). However, the guys in the camp see it as a new year,” he said.

“There is pressure, but we don't focus on that too much.”

Previous leaders set example

According to Claassen, he has never before led a team for which he played.

“I didn't expect to be captain,” the former pupil of Paarl Gymnasium said.

“This is something new. I have played with good leaders like AJ (Coertzen) and Oupa (Mohoje) before, and will take forward what I have learned from them.”

He also believes that there are several senior players, such as the vice-captain, Pieter-Steyn de Wet, who will assist him in his leadership role.

Back from injury

Claassen has played Currie Cup, Vodacom Cup, U21 and U19 rugby for the Free State.

However, a knee injury kept him out of action for nine months and he missed the last three Varsity Cup matches of 2015.

He returned for a training match against the University of Johannesburg in Kroonstad on 23 January 2016. The Shimlas also played a warm-up match against the University of KwaZulu-Natal in Bethlehem on 16 January 2016.

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