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Plant Sciences graduate contributes technique to manage stem rust

08 October 2020 | Story Leonie Bolleurs | Photo Supplied

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

UFS congratulates Free State on matric results

2017-01-05

With projects like the Internet Broadcast Project and the
Schools Partnership Projects the UFS helps to improve
education at schools in the Free State.
Photo: iStock

The University of the Free State (UFS) congratulates the Free State and its learners on their outstanding performance in the 2016 matric results. The university, who also plays a role in promoting excellence at school level, is proud of the Free State’s achievement as the best-performing province in the country with a 93,2% pass rate, excluding progressed learners.

“On behalf of the university community I would like to congratulate the Free State MEC of Education, Tate Makgoe, who is also a member of the UFS Council, and the Department of Education in the province on this fine achievement. The UFS is proud to be involved in projects that contribute to the success of the province’s learners. These include the Internet Broadcast Project (IBP) and the Schools Partnership Projects (SPP). The projects help to improve the quality of teaching and help learners to overcome severe domestic conditions in rural areas,” says Prof Nicky Morgan, Acting Vice-Chancellor and Rector of the UFS.

Internet Broadcast Project

The UFS IDEAS Lab in the Department of Open and Distance Learning on the UFS South Campus supports learners in 83 schools through the IBP with the help of academic videos. The project is a collaboration between the university and the Department of Education in the province. It includes support for subjects such as Mathematics, Physical Science, Life Science, Economics, Accounting, and Geography.

A purpose-built school appliance, comprising a projector, speakers, and a PC, is set up at each school, where learners receive video lectures from highly-qualified teachers.

During a function held in Bloemfontein on 5 January 2017 to congratulate performing schools in the province, Mr Makgoe made special mention of the IBP and said that part of the success of the province can be attributed to the project. Many of the top performing schools had learners who participated in the project. One of the districts that forms part of the project, the Xhariep District, was announced as the top performing district in the province, and is second in the country.

Schools Partnership Projects

The SPP focuses on teachers in order to have a more sustainable impact, with 69 schools in the Free State and Eastern Cape being part of it.

It makes use of mentors (30) who assist teachers and headmasters with school management, Mathematics, Physical Science, Accounting, and English as language of learning. The project has an annual budget of more than R15 million – all the funds come from sponsors outside the UFS.

Mentors visit schools and share knowledge, extra material, and technology to improve the standard of teaching. The change has been significant. Matric results and Bachelors pass rates have improved dramatically in these schools.

Another aspect is the identification of learners with potential (so-called first-generation students) to go to university. They are assisted through extra classes and in applying for tertiary education and bursaries.

Many of them currently study at the UFS, and also receive mentorship at university.

Dr Peet Venter, SPP Project Manager, said his team is proud to be part of the process of helping the Free State to become the number one province in the country again.

Both the IBP and SPP was started in 2011 and are managed from the university’s South Campus in Bloemfontein.

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