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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

Projects of the South Campus inspire excellence
2014-12-18

The University of the Free State’s (UFS’s) South Campus in Bloemfontein runs several projects to make a difference in the lives of learners and educators in the central region. These projects are based on the very essence of the UFS – to ‘inspire excellence, change lives’.

Three projects which have been very successful since the outset are the UFS Schools Partnership Project, the Family Math and Family Science Project and the Internet Broadcast Project.

The Schools Partnership Project attempts to empower teachers by improving their teaching skills in critical Gr 10 – Gr 12 subjects (Physical Science, Mathematics and Accounting).

Poorly performing schools are invited to join in the programme. A mentor, providing guidance to teachers in the planning of lessons, transferring knowledge and creating a healthy learning environment in the classroom, is assigned to each subject teacher. Management and leadership skills are also improved.

Hercules Dreyer, Programme Manager, says the success of the programme can be seen in the lessons, the results and the progress which have been made.

“In 2013, the pass rate of participating schools has grown from 71.5% to 85%. We had an increase in donors and the project went from 22 schools with 12 mentors in 2013 to 72 schools and 34 mentors in 2015.”

The UFS Family Math and Family Science Project, which is already in its sixth year of existence, are extremely popular. This intervention programme focus on bringing about a better understanding of Mathematics and Science in learners, teachers and parents.

Dr Cobus van Breda, Programme Director of the Family Math and Family Science Project, says that judging by the feedback from teachers, it is evident that the programme is growing from strength to strength and that it is making a real difference in Mathematics and Science education in the early school years.

The UFS’s Internet Broadcast Project (IBP) has thus far received four awards for their successes. In this project, lessons in Mathematics, Accounting and Physical Science are broadcasted from the UFS’s South Campus through internet presentations to schools in rural areas.

“To date, the IBP catalogue contains over 2 000 video lessons and in 2013 alone, the 68 schools accessed and used these videos 69 305 times. The project has the potential to reach more than 40 000 learners and 1 765 teachers every week,” says Sarietjie Musgrave, Project Manager.

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