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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

Almost 2000 degrees and diplomas conferred at Winter Graduation

2015-06-26

Live streaming will be available on: http://livestream.ufs.ac.za/

The 2015 Winter Graduations are almost underway. The highlight on the university calendar for every graduate will take place on the Bloemfontein Campus on 1-2 July 2015. On 1 July 2015, diplomas will be awarded by the Centre of Financial Planning Law (331 in total) and the School of Open Learning (376 in total). On 2 July 2015, a total of 1 220 master’s and doctoral degrees will be awarded to graduates from all seven faculties.

A highlight at this year’s Winter Graduation is the awarding of three honorary degrees by the university. Ambassador Lakhdar Brahimi, Dr Mercy Oduyoye and Mr John Samuel will receive honorary degrees.

On 17 August 2012, Ambassador Brahimi was appointed by the United Nations as the new peace envoy to Syria, replacing Kofi Annan. He is also a member of the Commission on Legal Empowerment of the Poor, the first global initiative to focus specifically on the link between exclusion, poverty and the law. Prof Heidi Hudson, Head of the Centre for Africa Studies at the UFS, will receive the honorary degree on his behalf.

Dr Oduyoye is widely regarded as one of the most influential women theologians Africa has produced in recent history. Currently, she directs the Institute of African Women in Religion and Culture at the Trinity Theology Seminary in Legon, Ghana.

Mr John Samuel, who will receive an honorary award, is also scheduled to be a guest speaker at the two ceremonies on 1 July 2015.

Wednesday 1 July 2015:

John Samuel will be the speaker at both ceremonies. He is one of South Africa’s leading education experts with international and national experience, covering a period of more than forty years. He was involved in the founding of the South African Campaign: Public Participation in Education Network (PPEN), established the Centre for Education Policy Development, the Joint Working Group (for The National Party Government and the ANC), the National Education Conference, and the National Education and Training Forum. He also made leadership contributions to the First Education and Training White Paper, the Transformation Strategy for the National Education Department, and the first Green Paper on Higher Education.

John is also Senior Programme Director of the WK Kellogg Foundation in the USA. He has also been the Chief Executive of the Nelson Mandela Foundation, and the CEO of the Oprah Winfrey Leadership Academy for Girls.

Thursday 2 July 2015:

Nataniël will be the speaker at both ceremonies. Nataniël is a singer, songwriter, and South African entertainer, who has crossed from the alternative circuit to the stage. For the past 10 years, he has become well-known for his outspoken Kaalkop column in SARIE magazine. His solo career was launched in 1987 and, since then, he has released 16 albums, staged more than 70 original theatre productions, and published 15 books. Over the past two decades, Nataniël has gained the title of South Africa’s leading exponent of the solo stage act. He manages Kaalkop Studio, his lifestyle retail company, and records on his own independent label, Nataniël House Of Music. He is an ambassador for Child Welfare SA, and also heads his own charitable foundation, The Nataniël Progress Project.

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