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02 January 2025 | Story Gerda-Marie van Rooyen | Photo Supplied
Prof Linus Franke
Leading the research in South Africa is Prof Linus Franke from the Department of Soil, Crop and Climate Sciences.

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 committed to a two-language model
2010-08-13

  Prof. Jonathan Jansen

The University of the Free State (UFS) will continue to use a two-language model while it builds capacity for research and teaching in Sotho languages.

This was announced by the Rector and Vice-Chancellor of the UFS, Prof. Jonathan Jansen, when he delivered the 29th DF Malherbe Memorial Lecture on the Main Campus in Bloemfontein yesterday, on the topic: The politics and prospects of Afrikaans, and Afrikaans schools and universities.

“In the course of time black students will learn Afrikaans, white students will learn Sesotho, and all students will learn decent English,” he said.

“Classes will remain in English and Afrikaans, especially in the first years of study. Dual-medium classrooms will break down the racial isolation where outstanding university teachers are comfortable in both languages. Parallel-medium classes will exist where large numbers enable such a facility.”

He said schools and higher education institutions that continue to use language as an instrument of exclusion, rather than inclusion, would remain “culturally and linguistically impoverished”. He said the future of Afrikaans in these institutions lay in its inter-dependence and co-existence with other languages.

“A strong two-language model of education, whether in the form of double- or parallel-medium instruction within a racially integrated campus environment is the only way in which Afrikaans can and should flourish in a democratic South Africa,” he said.

“It is the only model that resolves two problems at the same time: the demand for racial equity, on the one hand, and the demand for language recognition, on the other hand.”

He said the idea of an exclusively Afrikaans university was a “dangerous” one.

“It will lock up white students in a largely uni-racial and uni-lingual environment, given that the participation rates in higher education for Afrikaans-speaking black students are and for a long time will remain very low,” he said.

“This will be a disaster for many Afrikaans-speaking students for it will mean that the closed circles of social, cultural and linguistic socialization will remain uninterrupted from family to school to university.

“Rather than prepare students for a global world marked by language flexibility and cultural diversity, students will remain locked into a sheltered racial environment at the very stage where most South African students first experience the liberation of the intellect and the broadening of opportunities for engaging with the world around them.

“The choice at the Afrikaans universities, therefore, must never be a choice between Afrikaans and English; it must be both.”

Media Release
Issued by: Lacea Loader
Director: Strategic Communication (actg)
Tel: 051 401 2584
Cell:   083 645 2454
E-mail: loaderl@ufs.ac.za
13 August 2010

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