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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

21 Icons: 21 Years of Freedom Collection at the University of the Free State

2015-09-02

In Prayer and Protest - Sophia Williams De Bruyn

The Johannes Stegmann Art Gallery, in partnership with 21 Icons, is hosting the 21 Years of Freedom Collection, an exhibition specially curated for the University of the Free State.
21 Icons celebrates a heroic past and inspires a hopeful future. The project was launched in 2013 as an initiative that uses film, photography and written narrative to celebrate the lives of extraordinary South Africans. It highlights people who have been catalysts in shaping society, on a local or global level and across a variety of contexts: in a social, political, environmental or artistic sense.

It is the brainchild of internationally renowned photographer and filmmaker Adrian Steirn, whose primary source of inspiration was the life of Nelson Mandela. In one way or another, all of the men and women featured in the project have extended his legacy, making a magnificent impact on South Africa and beyond.

Beautiful Sacrifice - Albie Sachs

21 Years of Freedom features 21 icons from the first and second seasons of the project. It includes the last official photographic portrait of Nelson Mandela and many of his friends and fellow struggle heroes. Behind each portrait lies a carefully planned concept that captures the essence of each icon, capturing their spirit and distinct legacy.

Among the other extraordinary South Africans featured in this collection, are struggle icons Ahmed Kathrada and Advocate George Bizos, Archbishop Desmond Tutu, human rights and environmental activist Kumi Naidoo, celebrated storyteller Gcina Mhlophe, Nobel laureate Nadine Gordimer, activist and musician Yvonne Chaka Chaka, gender activist Sophia Williams De Bruyn and artist William Kentridge.

The Full Report - Zubeida Jaffer

The 21 Icons was created as a movement for positive change. By sharing the stories of iconic South African men and women, the intention is to inspire new generations to follow in their footsteps. With the country celebrating 21 years of democracy but still grabbling with injustices, the message that everyone can do something to make a difference, is portrayed in these powerful and inspiring stories.

Writer-in-residence and well-respected journalist, Zubeida Jaffer, who features among the collection of 21 striking photographs, opened the exhibition saying, “I feel like I’m surrounded by a circle of energy from which I have been fortunate to draw strength …It’s a choice that we make…whether to draw energy from those who are positive and forward looking or to surround ourselves with people who are fearful. There is a lot to be fearful about in our country. We have lived through very fearful and difficult times. But to cope with these times, those people and many others have kept their focus on hope. They have kept their focus on what is possible…and what we would like South Africa to be in the future.”

For more information on 21 Icons: 21 Years of Freedom Collection contact the Johannes Stegmann Art Gallery at +27 (0)51 401 2706 or dejesusav@ufs.ac.za

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