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08 October 2020 | Story Leonie Bolleurs | Photo Supplied
Dr Cornel Bender
Dr Cornel Bender received her PhD qualification at the virtual graduation ceremonies in October. The title of her thesis is: Stem rust resistance in South African wheat and triticale.

The rapid distribution of disease-causing organisms such as Ug99, a wheat stem-rust pathotype, pointed out just how vulnerable global cereal production is to disease outbreaks.

These cereals include wheat, barley, rye, oats, triticale, rice, maize, and millet and are one of the most important food sources for human consumption.

According to Dr Cornel Bender, the projected world population of 10 billion in 2057 requires a growth of more than 40% in cereal production. Wheat is grown on more hectares than any other cereal and is one of the most important sources of calories for humans. However, the growth rate of wheat yields has declined from the 1960s to the 1990s. Therefore, it is essential to increase global wheat production.

“With the regular appearance of more aggressive stem rust pathotypes in South Africa, there is a constant need to discover new sources of resistance, understand the genetic base of presently deployed sources in wheat, triticale and barley cultivars, and to manipulate the deployment of resistant sources through a more sustainable approach,” says Dr Bender.

Her PhD thesis, titled: Stem rust resistance in South African wheat and triticale, includes various fundamental aspects for the effective management of stem rust in South Africa.

Dr Bender is a Professional Officer in the Division of Plant Pathology in the Department of Plant Sciences, who received her PhD at the virtual graduation ceremonies in October.

Innovative and cost effective

Her promotors, Prof Zakkie Pretorius, Research Fellow, and Dr Willem Boshoff, Senior Lecturer in the Department of Plant Sciences, believe that she used an innovative approach to develop a cost-effective phenotyping method to select for more durable resistance types in a controlled greenhouse environment.

“In the past, results obtained from field trials used to assess adult plants for stem-rust resistance, were often influenced by abiotic factors, were seasonable in nature, expensive, and time consuming; therefore, the development of a dependable greenhouse screening system provides an important additional instrument for rust research,” says Dr Bender.

She adds that the greenhouse technique is used worldwide to screen for adult plant resistance and contribute to save time and money.

Broadening our knowledge

“Inheritance studies were undertaken to determine the genetic base of stem-rust resistance in selected South African wheat and triticale cultivars (developed from wheat/rye crosses) through seedling analysis as well as greenhouse and fieldwork,” she says.

Dr Bender believes the use and development of different resistance screening methods, the elucidation of host genetics, as well as the use of histological and microscopic methods to study early resistance responses, broaden our knowledge and understanding of stem-rust resistance in South African wheat and triticale cultivars.

Ultimately, rust researchers, grain producers, and also the general public – through access to their daily bread – will benefit from her study.

News Archive

UFS academics serve high in ranks of Cereal Science institutions
2017-10-10

Description: Cereal Science Tags: Cereal Science

Dr Angie van Biljon, Senior Lecturer in the Department of Plant Sciences at the University of the Free State (UFS), was elected as president of Cereal Science and Technology South Africa (CST-SA) at their bi-annual general meeting, in Pretoria.

Prof Maryke Labuschagne, Professor in Plant Breeding at the UFS and official representative of South Africa in the American Association for Cereal Chemists International from 2007, was re-elected as the South African representative to the American Association for Cereal Chemists. She attends the annual conference in the US as well as the International Association for Cereal Science and Technology (the European counterpart of AACC) regularly. “I use these conferences to report on the research done by the research team at the UFS on gluten protein, baking quality and nutritional value of cereals,” she said.

Prof. Labuschagne was also involved in a training course for the baking industry. 

Both Dr Van Biljon and Prof Labuschagne are involved in research on wheat gluten proteins, which is critical to the baking industry. CST-SA is a platform to disseminate this and other research, not only locally but also internationally. The aim of this society is to advance cereal science and technology both in the public sector and in the industry of Southern Africa.

CST-SA creates an opportunity for staff and
students working on cereals to interact
with the industry. This prevents research
from being just academic and creates
an opportunity to bring the research and the
industry together.

Wheat research not just academic
According to Prof Labuschagne CST-SA creates an opportunity for staff and students working on cereals to interact with the industry. This prevents research from being just academic and creates an opportunity to bring the research and the industry together. This has been very useful for students at the university working on cereals, as they have made presentations at the “New Voices” symposium, a forum for postgraduate students to present their research.

“Through CST-SA we have also, through the years, presented our research on an international level at the annual meetings of the American Association for Cereal Chemists and the International Association for Cereal Science and Technology,,” said Prof Labuschagne.

The science of cereals
CST-SA is an association of organisations and individuals, from both the private and public sectors, who are actively involved in the science and technology of cereals. Its aim is to promote the dissemination of knowledge and information on cereal science and technology through meetings, publications, workshops and other means. CST-SA also organises training courses for the industry. In the past years there was a course for the baking industry and one for the milling industry and also the “New Voices” symposium”.

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