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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

UFS releases draft charter to accelerate transformation

2007-02-02

The University of the Free State (UFS) today released a draft Institutional Charter which is intended to enhance and accelerate the ongoing transformation of the institution towards a non-racial, non-sexist future.

Speaking at the official opening of the university today, the Rector and Vice-chancellor, Prof Frederick Fourie, said the draft Institutional Charter, was an important milestone in the transformation debate for the university and the country.

“The draft charter acknowledges that black people, women and people with disabilities have been marginalised from job and developmental opportunities, within the higher education sector and at this university,” Prof Fourie said.

The charter commits the university to meeting the challenges of a transforming higher education institution in a developing society, in particular the challenges of nation-building, reconciliation, redress, non-racialism and non-sexism – and ultimately normalisation – within a high-quality academic institution.

The principles of the draft charter firmly signal the university’s commitment to diversity – attaining and maintaining substantive and sufficient diversity (including multiculturalism and multilingualism) – in its quest for quality and excellence.
Prof Fourie said the draft charter seeks to build consensus among staff and students at the UFS about the ultimate goals of transformation at a higher education institution.

The charter proposes several basic values and principles that should guide the transformation process and at the same time serve as a basis for a future, normalised university - a promised land to transform towards.

The discussion document says academic quality is intrinsically linked to transformation and it commits the university to strengthening the core competencies of research, teaching and learning as well as community service so as to ensure a robust university for future generations.

“Indeed the thousands of matriculants, black and white, who apply to study at the UFS want to study at a good university, and a good university wants to attract the best black and white students and the best black and white staff, male and female,“ Prof Fourie said.

He said the draft charter also seeks to safeguard academic freedom and institutional autonomy as the foundation of critical inquiry and scholarship.

Regarding the critical issue of creating a new institutional culture, the draft charter commits the UFS to creating a sense of belonging for all members of the university – black and white, male and female, of whatever language, religious, cultural or economic background, as well as people with disabilities.

Media release
Issued by: Lacea Loader
Media Representative
Tel: (051) 401-2584
Cell: 083 645 2454
E-mail: loaderl@mail.uovs.ac.za
02 February 2007

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