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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

Two honorary doctorates part of highlights at UFS graduations

2017-11-30

Leah Molatseli (left), Dr Imtiaz Sooliman, and Likeleli Monyamane will be
the guest speakers during the End-of-year Graduation Ceremonies
at the University of the Free State.
Photos: Supplied, www.mudboots.co.za

Roads and entrance closed due to roadworks on the Bloemfontein Campus

Graduation Livestream

Two honorary doctorates and a Chancellor’s medal will be some of the highlights during the End-of-year Graduation Ceremonies at the University of the Free State (UFS).

The Callie Human Centre on the Bloemfontein Campus will once again welcome graduates, their parents, friends, and relatives for the celebrations on 6 and 7 December 2017. A total number of 1226 qualifications, including diplomas, certificates, and degrees, will be conferred during the two days.

Altogether 40 doctorates and 109 master’s degrees will be awarded. Most doctorates (19) will be awarded in the Faculty of Natural and Agricultural Sciences, while most of the master’s degrees (27) are in the same faculty.

Prof Holloway, Botha, and Isaacs honoured
Prof Paul Holloway (Natural and Agricultural Sciences) and Marius Botha (Law) will receive honorary doctorates during the afternoon ceremony on 7 December 2017, while Joyene Isaacs (Natural and Agricultural Sciences) will be honoured with a Chancellor’s Medal.

Prof Holloway is an internationally acclaimed expert in the science and technology of surfaces, thin films, and nanoparticles, and Botha has played a significant role in financial planning in South Africa. Isaacs is the Head of Department of the Western Cape Department of Agriculture, and her department has been nominated by the South African Institute of Government Auditors as the best government department.

Young leader, young alumnus, and humanitarian
Likeleli Monyamane, Leah Molatseli, and Dr Imtiaz Sooliman will be the guest speakers at the ceremonies.

Monyamane, a UFS Council member, will address graduates on 6 December 2017 during the morning ceremony. She is one of 15 young leaders selected to represent Lesotho as participants in the Mandela Washington Fellowship in the United States. In 2016, Molatseli, the speaker during the afternoon session on 6 December 2017, launched South Africa’s first legal ecommerce website, Lenoma Legal, and is the university’s most recent Young Alumnus of the Year.

Dr Sooliman, the speaker at both ceremonies on 7 December 2017, is the founder and Director of the Gift of the Givers Foundation. He has received more than 100 national and international awards, citations, commendations, and special recognition for his humanitarian work.

Date: 6 December 2017
Time: 09:00: All qualifications up to Honours degrees in the Faculty of Economic and Management Sciences (including the Business School) and the Faculty of Natural and Agricultural Sciences
14:30: All qualifications up to Honours degrees in the Faculties of Education, Law, the Humanities, and Theology

Date: 7 December 2017
Time: 09:00: All qualifications up to Honours degrees in the Faculty of Health Sciences and Educational qualifications in Open Distance Learning – South Campus
14:30: Master’s and Doctoral degrees in all faculties

For information about the ceremonies, click here to visit the graduation home page.

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