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Plant Sciences graduate contributes technique to manage stem rust

08 October 2020 | Story Leonie Bolleurs | Photo Supplied

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 experimental farm to be redesigned as a training facility

2004-10-25

Back fltr:
Dr Léan van der Westhuizen, Manager: UFS Sydenham Experimental Farm; Prof Herman van Schalkwyk, Dean: Faculty of Natural and Agricultural Sciences at the UFS and Councilor Thami Stander, Chairperson: Mangaung Municipal Portfolio for Agriculture and Rural Development

Front fltr:
Mr Hanz Nketu, Chairperson: Free State Legislative Committee on Agriculture and Mr Peter Frewen from the Free State Legislature

The Faculty of Natural and Agricultural Sciences of the University of the Free State will soon sign a tri-partite cooperation agreement with the National African Farmers Union (NAFU) and the Mangaung Local Municipality with the aim of providing training and mentorship to small-scale and emerging farmers, including those recently settled under the on-going land redistribution programme.

The agreement is part of the Faculty’s strategic plan to support the on-going reform process in the country, of which Black Economic Empowerment in Agriculture (Agri-BEE) is an important part. The Free State Provincial Department of Agriculture is also actively supporting this initiative.

Under the plan, the Faculty is redesigning its experimental farm, located about 12 kilometers south of Bloemfontein, as a training facility to build up skills in among others broiler and egg production, dairy farming, animal husbandry, piggery, sheep and goat production. The idea is to introduce a comprehensive package that empowers the small and emerging farmers and the local communities adjoining the farms through simultaneous investments in research, extension, and practical agricultural training.

Learnerships are also being drawn up to provide productive skills in order to contribute to addressing the national skills gap and enhancing opportunities for both self and wage employment.

The residents of the adjoining informal settlement known as Mangaung Phase II where unemployment is currently at extremely high levels are primary targets of this component of the project. The Faculty intends for this project to service the farming communities of the Free State Province and gradually spread to other Provinces in the country.

Having recognised this training programme as a potential instrument for achieving “a united and prosperous agricultural sector”, the Free State Legislature has shown considerable interest in the programme.

Following a preparatory visit to the farms by the Agriculture Committee of the Free State Legislature a request was made to the Faculty to host a larger visit by the Legislative Committees of the Free State, North West and Eastern Cape Provincial Legislatures on Monday 25 October 2004 and present details of the training programme.

The President of NAFU in the Free State Province, Mr Nox Nonkonyana, the Dean of the Faculty of Natural and Agricultural Sciences, Prof Herman van Schalkwyk, the Chair of the Mangaung Municipal Portfolio for Agriculture and Rural Development, Councilor Thami Stander, and the Chairperson of the Free State Legislative Committee on Agriculture, Mr M Nketu, will address the Legislators during the occasion.

Prof Herman van Schalkwyk

Dean: Faculty of Natural and Agricultural Sciences

University of the Free State, Bloemfontein

Media release
Issued by: Lacea Loader
Media Representative
Tel: (051) 401-2584
Cell: 083 645 2454
E-mail: loaderl.stg@mail.uovs.ac.za
25 Oktober 2004

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