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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

First-years at South Campus step into a bright future
2015-02-05

Photo: Stefan Lotter

This is the first step to a bright future.

This was the resounding message that welcomed first-year students to the South Campus. “Remember,” Tshegofatso Setilo, Manager of the University Preparation Programme said, “a journey of a thousand miles begins with the first step.” But please do not get discouraged on your way, she urged, because “this is your first step to a bright future.

In his welcoming message, Prof Nicky Morgan, Vice-Rector: Operations at the UFS referred to the South Campus as the giant of the south. “This is one of the trailblazing campuses of the university,” he said. “No doubt what you’ll experience on this campus, you’ll never forget.”

This year, the South Campus boasts with 1 200 first-year students taking part in our University Preparation and Extended Programmes. These programmes allow students – whose matric marks did not reach the required total – the opportunity to study at the University of the Free State (UFS). The result? An astounding rise in pass rates. Some of the students on the South Campus outperform their peers studying at the Bloemfontein Campus, Prof Morgan remarked.

“You’ve got it in yourself. You’ve got the potential to unleash yourself on the world,” Prof Morgan said. You do not always realise the value of something that has come your way, he said. So, every moment you get an opportunity, he advised, use it to shape your future.

Addressing the newcomers’ fears, Prof Morgan urged each student to open themselves to the good and new experiences waiting for them. “When you find yourself in a new space, it always begins with you,” he said. Learn to understand how to live in harmony in different spaces.

Prof Morgan placed great emphasis on his closing remark: “At university, the more questions you seek to have answered – they’re worth more than the answers you have.”

 

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