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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

Top ‘political analyst’ for Spring graduation
2013-09-15

Graduands and parents can prepare themselves for an exciting Spring graduation, with a top ‘political analyst’ and a young woman who sees and sings with her soul, as guest speakers.

Chester Missing, South Africa’s top puppet political commentator, and Shenley Pretorius, a blind singer, will address the more or less 650 graduands on Thursday 19 September 2013. 

A total of 544 bachelors and honours degrees, as well as 106 diplomas and certificates, will be awarded during the graduation ceremony in the Callie Human Centre at the Bloemfontein Campus. The qualifications will be awarded at two ceremonies.

Chester Missing, a presenter on the television programme, Late Nite News with Loyiso Gola, will be 'accompanied' by Conrad Koch, one of South Africa’s most in demand comedy talents.

The 15-year-old Shenley touched people’s hearts nationwide when she appeared on Noot vir Noot, the SABC2 music programme, earlier this year. The teenager is a Grade 9 learner at Prinshof School for the Visually Impaired in Pretoria.

The programme for the different ceremonies is as follows:

  • 09:30 The Faculty of the Humanities awards 160 qualifications, The Faculty of Education 71 qualifications, the Faculty of Law 27 qualifications and the Faculty of Theology 2 qualifications.
  • 14:30 The Faculty of Economic and Management Sciences awards 137 qualifications, the Faculty of Health Sciences 98 qualifications and the Faculty of Natural and Agricultural Sciences 155 qualifications.

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