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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

Students excel in legal interpreting programme

2010-02-24

Prof. Ezekiel Moraka, Vice-Rector: External Relations at the UFS with one of the students who received a diploma.
Photo: Mangaliso Radebe

A success rate of 90% was achieved by the first group of 100 students that successfully completed the two-year Diploma in Legal Interpreting at the University of the Free State (UFS).

The group recently received their diplomas at the ceremony held on the Main Campus in Bloemfontein.

The programme, offered by the university’s Department of Afroasiatic Studies, Sign Language and Language Practice, in collaboration with the Department of Justice and Constitutional Development and Safety and Security Sector Education and Training Authority (SASSETA), is the only one of its kind in South Africa.

“The numbers that we are talking about here, if one looks at the needs of the country as such, is a small fraction,” said Advocate Simon Jiyane, Deputy Director General: Court Services in the Department of Justice.

“This is our first programme in collaboration with the UFS and I am hopeful it will lay a very solid foundation for other such programmes to follow.”

The diplomas were conferred by Prof. Ezekiel Moraka, Vice-Rector: External Relations at the UFS, on behalf of the Rector and Vice-Chancellor, Prof. Jonathan Jansen.

He urged the students to use their skills as qualified court interpreters in the context of the challenges that face South Africa such as HIV/Aids, racism, transformation, unemployment, poverty, job losses, and many other such challenges.

“This is the reality we are faced with, all of us,” he said. “It requires skilful and morally upright people to address it adequately and effectively. You are adding up to the number of skilful people in our country and that means you have a critical role to play.”

He said the UFS, as a societal structure, is equally affected by those challenges because of being accountable to and economically dependent on society.

He also urged the students to use their skills to make contributions to the processes of transformation that are underway at the UFS.

“For instance, the UFS as a national asset has to transform to that level of being a true national asset. We need your full participation in this process so that we can together ensure the relevance of this university as a true South African university,” he said.

Advocate Jiyane urged universities to also look at some of the initiatives that the government takes to improve service delivery. One such initiative is a pilot project focusing on the use of indigenous languages in courts.

“Its aim is to ensure that our courts begin to recognise all official languages in terms of conducting their business,” he said.

“It is our responsibility as a department that, through this project, we begin to build those languages so that they are on a par with the other languages that are being utilised in our courts.”

The department has permanently employed two of the students who received their diplomas, while one of them, Ms Nombulelo Esta Meki, was awarded a bursary by SASSETA to study for a BA in Legal Interpreting. Ms Meki was the top achiever of the programme with an average of 86%.

Media Release:
Mangaliso Radebe
Assistant Director: Media Liaison
Tel: 051 401 2828
Cell: 078 460 3320
E-mail: radebemt@ufs.ac.za
3 March 2010

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