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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

Traditional medicine can play important role in modern drugs discovery
2014-11-11

Indigenous knowledge possesses a great potential to improve science. Making use of this source may lead to advanced technological innovations. This is according to Dr Sechaba Bareetseng, UFS alumnus and Indigenous Knowledge Systems (IKS) Manager at the Council for Scientific and Industrial Research (CSIR).
Dr Bareetseng recently addressed the seventh annual IKS symposium on the Qwaqwa Campus.
“Interfacing indigenous and local knowledge with scientific knowledge has the potential of encouraging and developing inventions, especially in the pharmaceutical industry,” said Dr Bareetseng.
 
“Such interfacing can also enable access to both sets of knowledge without any discrimination whatsoever. It would also encourage co-existence that would improve understanding between the two.”
 
“Traditional medicine,” said Dr Bareetseng, “can play an extended role in modern drugs discovery as it is already happening in Botswana and New Zealand. These two countries are leading this wave of new thinking in as far as drug development is concerned.”
 
Dr Bareetseng also called on established researchers to start embracing the local communities into their research.
 
“Contemporary scientific research demands that local communities must co-author research conducted within and with them by the universities and research institutions. This would help in maintaining trust between the researchers and the communities that feel exploited. Regular feedback would also make communities feel part of the developments,” Dr Bareetseng argued.
 
He further called on the pharmaceutical companies specifically and researchers in general to convert valuable indigenous knowledge and resources into products and services of commercial value. “Plants, the ecosystem and indigenous knowledge must be preserved to provide a source of income for the local communities. Communities must also be protected from foreign exploitation of their intellectual property.”
 

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