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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

JN Boshoff Memorial Lecture: Dr Charles Nwaila

2005-09-13

Dr Charles Nwaila, Director-General of the Free State Provincial Government and Vice-Chairperson of the University of the Free State's (UFS) Council, recently discussed the repositioning of the Free State Provincial Government to respond to the 21st century demands during the JN Boshoff Memorial Lecture at the UFS.

From left: Dr Nwaila; Prof Tienie Crous, Dean: Faculty of Economic and Management Sciences; Prof Frederick Fourie, Rector and Vice-Chancellor and Dr Moses Sindane, Departmental Chairperson: Department of Public Management at the UFS.

A summary of the lecture.

Free State government to focus on training of public servants

The Free State provincial government in collaboration with higher education institutions in the province is to establish the Free State Association of Public Administration to get public servants to work effectively towards the growth and development of the province.
This was announced by the Director-General of the Free State provincial government, Dr Charles Nwaila, during a lecture he delivered at the University of the Free State (UFS) in Bloemfontein this evening (Thursday 8 September 2005).

Delivering the annual JN Boshoff Memorial Lecture at the UFS, Dr Nwaila called on higher education institutions to play a critical and leading role in the re-engineering of the existing Provincial Training and Development Institute housed at the Vista campus of the University of the Free State in Bloemfontein.

Dr Nwaila was formerly the Superintendent-General (head) of the Free State Department of Education and currently serves as the Deputy Chairperson of the Council of the University of the Free State.
He said the proposed Free State Association of Public Administration is a joint initiative with the National Academy of Public Administration based in Washington DC.

“We take this opportunity to invite the University of the Free State and other knowledge based institutions to join the Provincial Government in fostering a collaborative network to help us develop our public servants,” Dr Nwaila said.
He said there were accelerating demands and a lot of pressure on limited resources, with Free Staters expecting more from their government than ever before.

“Civil servants in a developmental state are servants of the people, champions of the poor and the downtrodden and not self-serving individuals that seek only advancement on the career ladder,” Dr Nwaila said.
According to Dr Nwaila, the Free State Growth and Development Strategy has identified 11 areas that need to be addressed by the year 2014, including:

• To reduce unemployment from 38% to 20%
• To improve the functional literacy rate from 69,2% to 85%
• To stabilize the prevalence rate of HIV and AIDS and reverse the spread of the disease
• To provide a free basic service to all households
• To provide adequate infrastructure for economic growth and development

Dr Nwaila said that the Free State government will continue to follow a people-centred approach towards these development objectives with a keen sense of unity and unwavering determination to create the best of times for the Free State and all its people.

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