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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

King Moshoeshoe comes alive on national television

2004-11-02

Honourable Bethuel Pakalitha Mosisili, Prime Minister of Lesotho, and his wife; King Letsie III of Lesotho and Dr Ezekiel Moraka, Vice-Rector: Student Affairs at the UFS during the première of the film at the Royal Palace in Lesotho

The ground-breaking documentary film on the life and legacy of King Moshoeshoe, the founder of the Basotho nation, will come alive on Thursday 4 November 2004 when it is screened on SABC2 at 21:00

The film, called Moshoeshoe: The Renaissance King, forms part of a larger project by the University of the Free State (UFS) to honour the Moshoeshoe legacy of nation-building and reconciliation and to explore his role as a model of African leadership. It was produced by the well-known journalist Mr Max du Preez and commissioned by the UFS as part of its centenary celebrations.

The SABC2 screening was preceded by a première in Bloemfontein last month, and was attended by provincial political leaders.

This past weekend there was a première at the Royal Palace in Lesotho, which was attended by King Letsie III, the prime minister, the chief justice, judges, the president of the senate, cabinet ministers and directors-general.

“Through this documentary film the UFS commits itself to developing a shared appreciation of the history of this country and to the establishment of the Free State Province as a model of reconciliation and nation-building. King Moshoeshoe is also a strong common element, and binding factor, in the relationship between South Africa/the Free State, and its neighbour, Lesotho,” said Prof Frederick Fourie, Rector and Vice-Chancellor of the UFS.

“Not all people in South Africa know the history of Moshoeshoe. Many Basotho – but not all – are well versed in the history of Moshoeshoe, and his name is honoured in many a street, town and township. Many white people know little of him, or have a very constrained or even biased view of his role and legacy. In Africa and the world, he is much less known than, for instance, Shaka,” said Prof Fourie.

“King Moshoeshoe did a remarkable thing in forging a new nation out of a fragmented society. He also created a remarkable spirit of reconciliation and a remarkable spirit of leadership,” said Prof Fourie.

According to Prof Fourie we already benefit from his legacy: the people of the Free State share a tradition of moderation and reconciliation rather than one of aggression and domination. “For the UFS this is also part of real transformation – of creating a new unity amidst our diversity,” said Prof Fourie.

“We also find in the legacy of King Moshoeshoe the possibility of a “founding philosophy”, or “defining philosophy”, for the African renaissance. To develop this philosophy, we must gain a deeper understanding of what really happened there, of his role, of his leadership. Therefore the UFS will encourage and support further research into the history, politics and sociology of the Moshoeshoe period, including his leadership style,” said Prof Fourie.

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

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