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02 January 2025
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Story Gerda-Marie van Rooyen
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Photo Supplied
Leading the research in South Africa is Prof Linus Franke from the Department of Soil, Crop and Climate Sciences.
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.
'England, the English and the problem of education in South Africa.’
2013-09-26
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Attending the lecture were, from the left: Dr Susan Brokensha, Senior Lecturer: Department of English; Prof Rosemary Gray, Professor Emeritus (Honorary Life Vice-President of the English Academy of Southern Africa); Prof Jonathan Jansen; and Dr Thinus Conradie, Lecturer: Department of English.
Photo: Johan Roux
26 September 2013 |
Prof Jonathan Jansen: Lecture
The university celebrated the life of one of South Africa's most renowned art critics, hosting the 2013 English Academy’s Percy Baneshik Memorial Lecture on the Bloemfontein Campus.
The keynote lecture was delivered by Prof Jonathan Jansen, Vice-Chancellor and Rector, who joined a distinguished list of speakers to have delivered the lecture. Presented annually by the English Academy of Southern Africa, an association dedicated to promoting the effective use of English as a dynamic language in Southern Africa, past speakers include Prof Es’kia Mphahlele, Prof Njabulo Ndebele, Dr Alan Paton and Prof Albie Sachs. The lecture is hosted at venues across the country and this year Bloemfontein paid tribute to Percy Baneshik.
In his speech Not even colonial born: England, the English and the problem of education in South Africa,' Prof Jansen addressed the dilemma of the politics of language in both school and university education today.
Talking about the dominance of English in schools, Prof Jansen said it is the language of choice because indigenous languages are so poorly taught. "Simply learning in your mother tongue is absolutely no guarantee of improved learning gains in school. The problem is not the language of instruction; it is the quality of teaching, the knowledge of curriculum and the stability of the school."
Prof Jansen told the audience in the CR Swart Hall that Afrikaans-exclusive, or even Afrikaans-dominant white schools represent a serious threat to race relations in South Africa. "You simply cannot prepare young people for dealing with the scars of our violent past without creating optimal opportunities in the educational environment for living and learning together."