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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

Statement regarding pulping of books by the UFS Sasol Library

2017-12-07

With reference to reports in the media and social media since 5 December 2017 about the pulping of books by the UFS Sasol Library, the executive management of the University of the Free State (UFS) would like to put the matter into perspective.

The book collection of the library is governed by a Library Committee of Senate, and no books can be removed from the library without formal approval from the committee. The university values the wealth of knowledge preserved in the library, and will not act irresponsibly with its collection.

Although the executive management takes note of the comments of some concerned organisations and members of the public in the media and social media the past couple of days, no books were removed from the library and sent to be pulped – only bound journals of which the university has online versions. These are journals that have been removed from the journal section for quite some time, and have not been used for a considerable number of years.

The decision to reduce the size of the collection to at least 35%, and to secure remote storage in close proximity of the library in Bloemfontein for some of the collections, was taken after a thorough external review of the library in 2014 as well as a gap review this year.

Two aspects were actioned after the review: books which have not been used at all in the past 20 years were moved to a storeroom in the library; journals removed from the journal section which have not been used actively for quite some time and which are not available online or cannot be found elsewhere through any means, will be moved to a remote storage in Bloemfontein and be retrieved as the need arises.

The only journals sent for pulping were those readily available online through current subscriptions, journals that the library is not subscribed to but are freely available online, journals that have since become Open Access Journals, magazines that have popular titles and are of no academic value, annual reports of societies and associations, and some abstracts. Thorough and responsible evaluation of these bound journals was done before they were sent for pulping.

The move of the books to a store room in the library and the removal of the bound journals will provide space to implement recommendations by the task team assigned by the Rector and Vice-Chancellor, Prof Francis Petersen, to investigate repurposing the library into a world-class, state-of-the-art library where physical and virtual space is created to support multi-purpose learning spaces for students, collaborative and group learning, and providing space for more innovation in the library through technology, thus enhancing the overall student and user experience.

Released by:
Lacea Loader (Director: Communication and Brand Management)
Telephone: +27 51 401 2584 | +27 83 645 2454
Email: news@ufs.ac.za | loaderl@ufs.ac.za
Fax: +27 51 444 6393

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