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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

Education dialogue opens engagement on legacy of OR Tambo

2017-10-05

Pali Lehohla, outgoing Statistician-General speaking at the
Centennial celebration of Oliver Tambo.
Photo: Supplied

To celebrate Oliver Reginald Tambo’s centennial year, the Oliver and Adelaide Tambo Foundation, in partnership with the Rector and Vice-Chancellor of the University of the Free State (UFS), Prof Francis Petersen, and Absa Bank, hosted an interactive dialogue session, titled “Educating Africa’s Future” on 26 September 2017 on the Bloemfontein Campus.

Students encouraged to take charge of their future
The event opened up dialogue on some of the current burning issues that affect students in South Africa, societal challenges such as poverty and crime, and how leaders such as Tambo envisaged a free Africa. Prof Petersen highlighted the role that universities played in developing society, in creating leaders and crafting the path to transformation. Other speakers included Pali Lehohla, outgoing Statistician-General, Linda Vilakazi, CEO of the Oliver and Adelaide Tambo Foundation, Nombulelo Nxesi, CEO of Education, Training and Development Practices, Sector Education and Training Authority, Prof Peliwe Lolwana, Associate Professor at Wits University’s Centre for Researching Education and Labour, and Sikhululekile Luwaca, former UFS Student Representative Council (SRC) president.

Education may require a new approach
During the panel discussion that was facilitated by Phiwe Mathe, former UFS SRC President and media officer in the Office of the Chief Whip of the Free State Legislature. The audience raised concerns regarding the future of funding for university study, the securing of employment and possibilities, if any, of entrepreneurship. In response to some of the concerns, Pali Lehohla said the realities of family dynamics in South Africa affected the ability of students to be properly profiled and funded, according to family income, and that most importantly, the solutions to Africa’s challenges had to come from within and not without. Students’ questions gravitated towards the question of whether higher education in its current form was still valuable or whether new models of teaching that would foster inclusion and earlier economic independence would be of better value.

The legacy of OR Tambo continues to be honoured
The notion of education as a driver for the liberation of South Africa and the continent as a whole, poverty alleviation and freedom from colonial rule are some of the building blocks of the legacy of Oliver Tambo.
Linda Vilakazi reiterated that students and student leaders would benefit from seeing the importance of using a broad-based African approach to the issues that plague them and their peers, rather than seeing their challenges outside of the continental context. Sikhululekile Luwaca said higher education must be more accessible, and in order to drive change, students should use their education to become future employers rather than employees and change the face of the future themselves as was envisioned by other liberation leaders.
Caption: Pali Lehohla, outgoing Statistician-General speaking at the Centennial celebration of Oliver Tambo.

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