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02 January 2025 | Story Gerda-Marie van Rooyen | Photo Supplied
Prof Linus Franke
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.

News Archive

Mandela statues and the issue of public representation
2015-09-04

   

Prof Grant Parker, Associate Professor of Classics and Co-Director of the Centre for African Studies at Stanford University, USA, presented a public lecture on the Bloemfontein Campus on 27 August 2015, in which he explored the topic of ”Memorialising Mandela after Rhodes Must Fall”. What stories do the multitude of Mandela statues tell us about the man? Our society? Ourselves? These were some of the questions Prof Parker addressed during his lecture.

Paradoxes
Prof Parker discussed some of the paradoxes presented by the Mandela statues. The huge 9m high Mandela statue at the Union Buildings in Pretoria does not necessarily reflect his humility. Iconic statues strewn across the world do not reveal Madiba’s appeal. “Madiba’s charm,” Prof Parker said, “was all about his ability to relate to people of very different backgrounds. People who were his enemies would – to their surprise – find a humanity they were not expecting. It’s very hard to reconcile that with the colossal statues.”

Rhodes Must Fall
On the topic of the Rhodes Must Fall campaign, Prof Parker said that “the debates around it seem to express the frustration of deepening equality in general and lack of demographic change.” He also believes that, although the campaign centres on statues, there are much deeper issues at play that need to be addressed.

Artists should be part of the conversation
Prof Parker also advocated that artists’ voices should be incorporated into the creative processes of public art. “There is a much greater need for creative artists,” he concluded, “to be part of conversations, not only about what we as South Africans want to commemorate, but how we do that. I would very strongly suggest that this be done by non-figural representations.”

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