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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 in forefront with ASGI-SA initiative

2006-05-10

At the conceptualisation colloquium and stakeholder dialogue were from the left Dr Aldo Stroebel (senior researcher at the UFS Research Development Directorate), Dr Edith Vries (acting Chief Executive Officer of the Independent Development Trust) and Prof Frans Swanepoel (Director: UFS Research Development Directorate).

UFS in forefront with ASGI-SA initiative

Two staff members of the University of the Free State (UFS) have been appointed as members of the advisory board of the national programme for the creation of small enterprises and jobs in the second economy. This programme forms part of government’s Accelerated and Shared Growth Initiative of South Africa (ASGI-SA).

Prof Frans Swanepoel, Director of the UFS Research Development Directorate and Dr Aldo Stroebel, senior researcher at the UFS Research Development Directorate, are working with a team of experts from the UFS on a draft implementation strategy for the national programme. Both Prof Swanepoel and Dr Stroebel are also associated to the UFS Centre for Sustainable Agriculture.

“The strategy is being developed in collaboration with institutions like the Independent Development Trust, the Department of Agriculture, the National Development Agency and the Department of Trade and Industry,” says Prof Swanepoel.

The other team members of the UFS are Prof Basie Wessels, Director of the Mangaung-University Community Partnership Programme (MUCPP) and Mr Benedict Mokoena, project manager at the MUCPP.

Dr Stroebel was also member of the organising committee of a conceptualisation colloquium and stakeholder dialogue that was recently presented in Johannesburg. The conference was attended by more than 400 delegates from government departments, higher-education institutions and civil society, including Dr Kobus Laubscher, member of the UFS Council.

The conference was facilitated by Ms Vuyo Mahlati, previously from the WK Kellogg Foundation’s Africa programme and opened by Ms Thoko Didiza, Minister of Agriculture and Land Affairs.

“The colloquium formed the basis of an induction workshop during which a group of 150 individuals (50 teams of three) from all nine provinces, identified to initiate the implementation of the national programme, was trained and orientated towards an induction manual in collaboration with Hand-in-Hand, an Indian counterpart,” says Prof Swanepoel.

Dr Stroebel and Mr Benedict Mokoena formed part of the team to conceptualise and finalise this training manual. The induction training includes a case study of a successful community self-help partnership model, namely the MUCPP at the UFS. Prof Wessels and Mr Mokoena are both playing a leading role in the further development of subsequent training initiatives throughout South Africa, in partnership with the relevant provincial departments.

“The involvement of the UFS in the programme is a compliment to us. It reflects the value government sees in the use of academics and experts in the management of the ASGI-SA initiative. It is also an indication of one of the aims of the UFS to play a role in South Africa and Africa and in the transformation and change that is taking place in our country,” says Prof Swanepoel.

Media release
Issued by: Lacea Loader
Media Representative
Tel: (051) 401-2584
Cell: 083 645 2454
E-mail: loaderl.stg@mail.uovs.ac.za
10 May 2006

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