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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

Inaugural lecture explores the compatibility of commercial certainty and constitutionalism
2015-10-15

From the left: Prof Caroline Nicholson,
Prof Elizabeth Snyman van Deventer,
Justice Malcolm Wallis and Dr Lis Lange.

Justice Malcolm Wallis presented his inaugural lecture, entitled “Compatibility of commercial certainty and constitutionalism”, to the Faculty of Law on 17 September, 2015. The occasion was attended by faculty staff, students, and senior members of the Bloemfontein judiciary.

In her welcoming remarks, Prof Caroline Nicholson, Dean of the Faculty of Law at the UFS,  expressed the immense pride the faculty has in hosting such an occasion, and the remarkable work of Justice Wallis in the South African legal fraternity over his forty-year career.

Justice Wallis spoke of the constitution’s important role in ensuring that the law in commercial matters is enforced fairly without the prejudice or undue influence from the desire to obtain or preserve personal advantage. “Try, if you can, to conceive of a society in which commercial relationships are enforced and enforceable purely as a matter of discretion. Ask yourselves:  how would such a society function?” he said.

He reiterated that the role and the rule of law is to guide and protect parties in commercial transactions. It has considerable impact on society in how it is enforced. “Commercial disputes may seem to involve only the parties to the proceedings, but when they involve significant changes to established commercial law, their impact is inevitably wider. Such changes affect other agreements, other relationships, underlying financing transactions, and, in our modern world, contracts of insurance and reinsurance. The latter at least will always have an international dimension,” he said.

He explored specific judgements and the role the concept of “Ubuntu” played in delivering them, the fair enforcement of commercial law, and how this should be an integral part of South African law under the constitution.

 In closing, Justice Wallis stated that “in principle, the existence of a constitution and constitutional rights need not destabilise commercial law, or the reasonable expectations of business people.”

Justice Wallis has received numerous accolades locally and internationally during his long career, including his appointment as a Professor Extraordinary in the Department of Mercantile Law at the University of the Free State in 2014.



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