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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

Lecture on interpretations and translations of San place names

2011-09-23

Prof. Peter Raper, recently appointed as Honorary Professor: Linguistics, in the Department of Language Management and Language Practice at the University of the Free State, will deliver his inaugural lecture on Tuesday evening, 27 September 2011. His topic for the evening is “Interpretations and translations of Bushman (San) place names”. With this inaugural lecture, he also introduces an interesting one-day international colloquium on the theme: “Name-change planning – striving towards authenticity”.A panel discussion about street-name changes in Bloemfontein forms part of this colloquium and promises to elicit a stimulating debate.

Prof. Raper is probably better known for three popular place-name dictionaries, Streekname in Suid-Afrika en Suidwes, published in 1972; the Dictionary of Southern African Place Names, published in 1987, updated in 1989 and published in 2004 with some additions as New dictionary of South African place names; and Hottentot (Khoekhoen) place names, a dictionary compiled in collaboration with the famous Prof. G S Nienaber (a former Kovsie). In fact, Prof. Raper’s work is a continuation of their world-renowned series, Toponymica Hottentotica, which was published between 1977 and 1981. It is generally regarded as the most authoritative work on Hottentot place names. His current interest in Bushman place names builds on this pioneering work and is actually also a re-evaluation of the underestimated role of the Bushman with regard to place naming in South Africa up to now. His work offers a new perspective on what could be regarded as the “first” or earliest names of places in South Africa and brings a sobering perspective to the current debates regarding place-name changes where various claims are made about “who has given the name first”.

However, Prof. Raper is also known for his role in the standardisation of place names, both nationally and internationally. In South Africa, he has served on the South African National Place Names Committee (1972-1999), the South African Geographical Names Council (1999-2002) and, since 1981, on the Names Society of Southern Africa. Currently, he is an honorary member of this association. Since 1984, he has also been serving on the United Nations Group Experts on Geographical Names and has even been the Chairperson of this Leading international standardisation body (1991-2002).

Apart from this, Prof. Raper regularly publishes his research on geographical names in a variety of academic journals and still participates in the most important national and international conferences on names on a regular basis. Prof. Raper is honoured as South Africa’s foremost names expert.

His inaugural lecture will introduce a colloquium on names planning, presented by his host department. Experts from Lesotho, Zimbabwe and the USA are participating in the proceedings, amongst others, the current Chairperson of the Names Society of Southern Africa, Prof. Adrian Koopman (University of KwaZulu-Natal).

RSVP: Joy Maasdorp on +27(0)51 401 2405 or maasdorpjh@ufs.ac.za before or on Thursday, 22 September 2011.

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