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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

Out of the ordinary lunch with Prof Jansen
2015-08-17

Prof Jansen and the twins pose for pictures after enjoying a laugh and chat at the lunch event.

Numerous sets of twins and a set of triplets were entertained by, and enjoyed lunch with, the Vice-Chancellor and Rector of the university, Prof Jonathan Jansen.  Wednesday 12 August 2015 marked an extraordinary day in the Kovsie history book.

The Reitz Hall in the Centenary complex was filled with echoes of laughter as Prof Jansen told “twin jokes” he had Googled earlier for the occasion. Save for the humour, he said that twins and triplets represent a unique bond.  “After all, we should be striving for a way of being together,” he said, speaking about the quest for national solidarity.

Sitting in groups of six, and after the introductions, the duos and trio were soon engaged in conversation.

Anita and Mikita Miza, who were sharing a table with Marike and Ilna Marais, told stories from their childhood.

“We did not realise that we were twins until we were in grade one,” said Anita, who is studying the same course as her sister. Mikita is in the second year of her BSoc Science degree, while her twin is a year ahead. She had to remain in Mtata, their hometown, for a year while Anita began her first year. “It was the longest year of my life,” said Mikita.

Marike and Ilna are first years in Physiotherapy and Optometry, respectively. When asked by Prof Jansen what they never share, the non-identical twins were quick to reply: “clothes,” although they still share a room. When they were in high school, fellow learners struggled to believe that Marike and Ilna are twins, because of their distinctly different looks.

The lunch united strangers, who have a unique common bond, and acted as a platform to tell interesting stories that are seldom heard.

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