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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

Grant encourages and enables more learners to enter into science-related studies and careers

2009-06-26

At the launch are, from the left, front: Consolation Mochusi, Graad 12 learner from Heatherdale Secondary School, Alexander Bergman, Grade 10 learner from Grey College Secondary School, Danél Prinsloo, Grade 11 learner from Eunice High School; middle: Ms Lea Koenig, Coordinator: ICT Laboratory of the Qwaqwa Campus, Prof. Daniela Coetzee-Manning, Director: CED; back: Ms Elna Fourie, Development Planner from SANRAL, Prof. Teuns Verschoor, Acting Rector of the UFS, Mr Cobus van Breda, Project Coordinator: CED and Mr Nazir Alli, Chief Executive Officer of SANRAL.
Photo: Stephen Collett

The University of the Free State’s (UFS) Centre for Education Development (CED) has this week launched a project on the Main Campus in Bloemfontein.
to enable and encourage more learners to enter into science-related studies and careers.

The grant of R4,5 million over a period of three years was made by the South African National Roads Agency Ltd (SANRAL). This week’s function was attended by the representatives of the sponsors and the UFS, as well as learners, parents, principals and Physical Sciences teachers of participating schools.

The grant will be utilised to foster a positive attitude towards Mathematics and Science amongst learners in the early school years as well as raising the knowledge and skills levels of learners in the Further Education and Training (FET) Phase. “This will be done through our Family Math and Family Science Programme for younger learners and through e-Education in Science and Mathematics for learners in the FET Phase,” said Mr Cobus van Breda, Project Coordinator at the CED.

About 330 selected Grade 10, 11 and 12 learners from 16 schools in the Free State are attending Physical Sciences and Mathematics sessions during weekdays at the ICT Laboratories on the Main and Qwaqwa Campuses of the UFS. In order to make provision for the needs of generation Y-learners (techno-clever generation), the project envisages to enhance their understanding of Science and Mathematics principles by utilising the advantages of ICTs (Information and Communication Technologies) during the sessions.

On average, learners attend four sessions per term, with one of the sessions a special event like visiting Boyden Observatory, departments at the UFS, etc. Learners will be exposed to about 36 sessions over the three years. Special attention to vocational guidance, in collaboration with the Unit for Prospective Students at the UFS, forms part of the support system of the programme to participating learners.

“Learning is a life-long experience and we must encourage our learners to grab this opportunity to learn more about important fields such as Mathematics and Science. It is a privilege for SANRAL to have this partnership with the CED and the university as it is an indication of our efforts to educate our youth,” said Mr Nazir Alli, Chief Executive Officer of SANRAL.

Mr Alli encouraged learners to grab the opportunity to learn and to make the field of science their career. “Science can be the foundation on which to build your career and this programme can assist you to reach your goal,” he said.

According to Prof. Teuns Verschoor, Acting Rector of the UFS, the SANRAL grant is a wise investment because it is an educational investment. “We cannot cut back on the investments we make in education and SANRAL’s investment in this programme is of benefit to schools and learners in the central region. Through this programme, its bursaries, various career opportunities and ongoing support of schools and universities SANRAL is making a huge contribution to promoting science-related studies and careers in our country,” he said.

Media Release
Lacea Loader
Assistant Director: Media Liaison
Tel: 051 401 2584
Cell: 083 645 2454
E-mail: loaderl.stg@ufs.ac.za
26 June 2009

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