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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

Bright young mind shines
2016-12-12

Description:Candice Thikeson  Tags: Bowls  longdesc=


Candice Thikeson, a Master’s
student in Arts History and
Image Studies at the University
of the Free State.
Photo: Anja Aucamp

“I was once told that I looked ‘immaculate’, as always. We use the word ‘immaculate’ to describe the Virgin Mary, does it get better than that?”

To everyone else, she may be a Mandela Rhodes Scholar, Bright Young Mind and Abe Bailey Travel Bursary candidate, but there is more to this beauty that meets the eye.

Relating to women in the humanities field

Candice Thikeson, who is currently a Master’s student in Art History and Image Studies, says “I have a very strong spiritual foundation and my relationship with God really fuels everything I do. I also think being intentional about building great relationships with your family and friends is imperative.”

She says she has been inspired by different people at different stages of her life and draws a great deal from academics, creatives and activists. She relates best to women who are in the humanities and draws inspiration from the likes of Nigerian novelist, Chimamanda Ngozi Adichie, and Kenya-born, Somalian poet Warsan Shire.

“I love how they are able to comment on some of the most pressing issues black women face through beautiful and poignant writing. I also admire how frank these women are, something I’m still learning to be,” Thikeson says.

Pursue something you are genuinely interested in

The biggest misconception people have of her is that she studies art and she is working towards becoming an artist. “Fine art and art history is not the same thing. I don’t paint or make art at university, and I really don’t enjoy being called an artist.”

When asked about how she has become so successful at such a young age, she reiterated the cliché: “pursue something you are genuinely interested in and passionate about”. She adds, “if you are really good at what you do, your gift will make room for you in your field”.

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