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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

Soetdoring/Kagiso pair-up wins 2015 Stagedoor
2015-03-03

With a new format and residences mixing it up, the 2015 Stagedoor proved to be a success yet again, leaving Soetdoring and Kagiso with the spoils of victory.

Stagedoor (the annual first-year residence stage and serenade competition) saw a change of format this year where residences were combined to perform in a few number of outdoor venues for rotations.

Prior to this, Residence CoRC Cultures expressed much concern regarding the co-operation that might (or might not) be achieved with working with other residences. These were all early stage fears. However, as their preparations progressed there seemed to be a glint of light at the end of many groups’ tunnels.

Seven diverse and combined groups made it through to final, namely;

• Vishuis and Tswelopele,
• Karee and Armentum,
• Sonnedou and NJ van der Merwe,
• Soetdoring and Kagiso,
• Roosmaryn and Vergeert-My-Nie,
• Villa Bravado and Madelief, and
• and Veritas and Marjolein.

The finals proved that the efforts and sleepless nights of RC Cultures, first-years, composers, and other behind-the-scenes contributors can really make any situation work.

As always, the crowd was blown away by the musical and vocal talent of first-years, as some compositions gave the audience goose bumps, leaving them asking for more. All in all, the evening created a frenzy, causing residences to interact whereas they would have never done so before.

According to the Student Affairs’ Arts and Culture office, the aim behind the new format was to break the barriers between residences. Arts and Culture were also pleased as to with how the RCs worked around accommodating their partners and ensuring maximum co-operation, despite some challenges.

As the night neared its closeclosing, residences were chanting their names and showing their pride in their first years’ performances.

2015 Stagedoor final results:

1. Soetdoring and Kagiso
2. Roosmaryn and Vergeet-My-Nie
3. Vishuis and Tswelopele

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