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The holy grail of potatoes

02 January 2025 | Story Gerda-Marie van Rooyen | Photo Supplied

Scientists are actively pursuing the successful breeding of diploid hybrid potatoes from inbred lines. This is expected to revolutionise potato breeding as it holds the key to rapid genetic progress. It will introduce new varieties for commercialisation through seed. Currently, existing potato variants have a gene that renders self-pollinated seeds infertile.

Prof Linus Franke, an academic in the Department of Soil, Crop and Climate Sciences at the UFS, is leading the research in South Africa. “This technology allows the production of genetically uniform potato seed that is easy to transport and largely disease-free.” He says this differs from conventional breeding whereby only vegetative propagation is possible due to tetraploid varieties in potatoes. It also risks carrying pests and diseases from one generation to the next – leading to the accumulation of pests and diseases with each round of multiplication.

Seed innovation

Prof Franke explains that Solynta BV, a seed company based in the Netherlands that produces potato varieties that can be grown from seed, has included South Africa in their research efforts because it is one of Africa’s largest producers and exporters. Through his academic relationship with Wageningen University and Research, a Dutch institution renowned for its agricultural endeavours and food production, the UFS became involved in researching hybrid potatoes grown from seed.

Diploid seeds containing two sets of chromosomes allow easier gene manipulation to increase predictability and speedier genetic progress. The breeding approach enables the incorporation of tolerance to pests, diseases, abiotic stresses (cold, heat, drought) and other desired genetic traits.

Although Prof Franke is optimistic about this research, he is not blind to disadvantages. “Potato seeds are tiny and have little energy reserves, making it harder to grow potatoes from seed than from tubers.” He says potatoes from seed will take longer to cultivate than tubers, as farmers need to grow plantlets from seeds first, adding six weeks to the growing period. “It is possible that commercial farmers can grow potatoes directly from seed. Alternatively, perhaps more likely, specialised growers will produce tubers of potatoes from seed; these tubers are then sold as seed tubers to other potato farmers, who then continue their normal practices of producing potatoes for the market from tubers.”

Financial benefits

Prof Franke says farmers have reason to get excited. “Seed potatoes will reduce input costs, as varieties with enhanced tolerance to pests and diseases require less pesticides. Planting one hectare of potatoes requires three to four tonnes of potato tubers, but only one 25 g packet of potato seeds.” Since potatoes are a more valuable commodity than maize, this technology might also increase farmers’ income potential.

News Archive

First M degree in Sport Medicine commences at the UFS

2006-02-03

Some of the guests that attended the launch of the M degree in Sport Medicine were from the left Dr Derik Coetzee (senior lecturer at the UFS Department of Human Movement Science and one of the tutors of the programme); Dr Sorita Viljoen (a student from Bloemfontein); dr Stephan Pretorius (a student from Pretoria) ; Dr Louis Holtzhausen (Programme Director: Sport Medicine at the UFS) and Prof Teuns Verschoor (Vice-Rector: Academic Operations at the UFS).
Photo: Lacea Loader

First M degree in Sport Medicine commences at the UFS

The classes of the first group of nine students registered for the M degree in Sport Medicine at the University of the Free State (UFS) commenced at the School of Medicine this week.

This is the first degree of its kind presented by the UFS. Only two other universities in South Africa are presenting the course, namely the University of Cape Town and the University of Pretoria.

“It is an important new subject field for medicine in South Africa and is aimed at medical doctors,” said Dr Louis Holtzhausen, Programme Director of Sport Medicine in the School of Medicine and head of the UFS Sport and Exercise Medicine Clinic.

The course focuses on the wellness and healthy lifestyle of patients and also intercepts the growing need for a specialized medical service for sportsmen,” said Dr Holtzhausen.

Athletes’ needs for specialised medical care have increased dramatically during the past ten years. “The primary health care practitioner has already surrendered a great deal of the athletics community to disciplines such as physiotherapy, bio kinetics, homeopathy, chirology and other alternative disciplines because of a lack to provide for these practitioners,” said Dr Holtzhausen.

“The course is especially in demand with general practitioners because they want to deliver a more specialized service to patients. With this course a student can call him/herself a sport doctor and will then not only be able to present patients with scientifically funded exercise, food supplements and advice on their lifestyle, but will also be able to help with the rehabilitation of patients with chronic illnesses,” said Dr Holtzhausen.

“The greatest medical care expense in South African stems from lifestyle bound illnesses such as depression, strokes and obesesiveness. The M degree in Sports Medicine at the UFS will intercept some of these problems,” said Dr Holtzhausen.

According to Dr Holtzhausen the duration of the degree is three years and it comprises of three legs. In the first leg, attention is given to an athlete’s performance and how it can be improved with the correct methods and supplements. In the second leg attention is given to the wellness of patients and the reversibility of the risk of illness and the exercise rehabilitation of chronic illnesses such as diabetes and hart problems to assist patients to exercise in a scientific way in order for them to start living optimally again. In the third leg attention is given to a healthier lifestyle as a precautionary measure.

The course also includes a lecture part (four attendance sessions of seven days each) and a thesis.

“The new course is important for the UFS as the whole tendency in medicine is to move into a direction of a more affordable precaution. There is no other qualification or programme with as much detail as this course,” he said.

Media release
Issued by: Lacea Loader
Media Representative
Tel: (051) 401-2584
Cell: 083 645 2454
E-mail: loaderl.stg@mail.uovs.ac.za
3 February 2006

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