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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

First-year wellbeing a top priority at Harmony residence

2017-06-07

Ladies from the House Harmony, a unique residence
that focuses on first-years’ experience.
Photo: Supplied

A unique residence that focuses on first-years’ experience, is exactly what Harmony sets out to provide for all first-year students at the University of the Free State.

A residence focusing on mentoring

Entering the adult world can be a daunting experience, but Harmony, unlike other residences on campus, focuses on mentoring. Harmony came to life in 2014 and has assisted many first-years in adapting to the university environment.

According to Pulane Malefane, Residence Head of House Harmony, they have witnessed a significant change in the pass rate of first-year students. “We have realised that first-years gain confidence much quicker than in other residences where they still need to find their way around seniors,” she says.

Adapting to the varsity environment

Harmony makes use of a Residence Assistants (RA) system, not Residence Committees (RC). The RA stay in corridors with their mentees in order to have close contact with them. An RA’s primary role is to be a mentor to first-years and also expose them to different co-curriculum activities on campus. They assist them in adapting to the varsity environment quicker, so as to be able to focus and concentrate on their academics.

Nicole Rabe, RA First-years, says the Harmony belles never cease to amaze her. “Watching these first-years grow from the high school girls that arrived at the start of this year, to the independent women they are now, has truly been a blessing.”

Malefane mentions that they intentionally try to place students from one faculty in the same corridor. In that way, mentors and residence assistants are in close proximity to them. “We have study rooms in each and every corridor of Harmony, making it easy for students to study close to their rooms at any time,” she says.

Phathutshodzo Nekhavanmbe, a first-year LLB student, says she could not have asked for a better house to be placed in. “The Harmony experience has been great so far, as the people living there are approachable and eager to lend a helping hand.”

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