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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

What did they learn at Stanford University?
2015-11-04

    

Members of the cohort with the
Vice-Chancellor and Rector of the UFS,
Prof Jonathan Jansen

Every year, since 2012, six second-year Kovsies are selected to take part in the elite Stanford Sophomore College Programme at the prestigious Stanford University in the United States. The University of the Free State and Oxford University are the only non-Stanford members of this exclusive course.

From 31 August to 15 September 2015, Farzaana Adam, Cornel Vermaak, Precious Mokwala, Tristan Van Der Spuy, Anje Venter, and Naushad Mayat undertook a three-week long academic exploration of multidisciplinary topics. These students attended seminars aligned with their respective fields of study from which they accumulated a wealth of knowledge.

This year’s cohort reflects on what they learned at Stanford University:

The significance of analyzing technology

One of the key points gathered by Farzaana Adam from the seminar, ‘Great Ideas in Computer Science’, was the necessity not to approach technology at face value. “Computer science goes beyond the technological products and social networks. By analysing the concepts underlying these technologies, many discoveries which have benefitted many fields of study have been made possible.”

Critical thinking in Arts and Science


“By combining different fields of study, one can obtain a greater perspective on the relevant fields,” said Cornel Vermaak, about what he garnered from a seminar titled ‘An Exploration of Art Materials: An intersection between the Arts and Science’. “This greater perspective enables one to evaluate problems critically,” he added.

Visual media substitutes oral narratives

“We were also taught different ways in which to interpret images, and how images influence society. Photography is a way to tell a story without actually having to say anything,” reflected Precious Mokwala, on ‘Photography: truth or fiction’

A lesson in business economics


Tristan Van Der Spuy received pointers pertaining to the stock exchange market    in ‘A Random Walk Down Wall Street’. “We looked at stock markets, and what influenced the stock prices of multiple companies, taking note of what should be looked at when investing in a company.”

Race relations and representation

‘The New Millenium Mix: Crossings between Race and Culture’ exposed Anje Venter to a global perspective on identity. “We explored the new generation of people that have mixed races and cultures, and how they are depicted in media and art.  We analysed the discrepancies and stereotypes of these depictions through film, novel, and short story studies, as well as through field trips to museums and art exhibitions.”

Overcoming the HIV/AIDS endemic


Naushad Mayat realised that “more teamwork and transparency between governments, chemists, social workers, and clinicians will be required for us to stem the flow [of HIV/AIDS],” in view of what he learned in a seminar on ‘HIV/AIDS: A Response to the AIDS Epidemic in the Bay Area’. “It is a daunting task. For the current generation of youth to tackle this epidemic now, we must stand together and be counted,” he added.



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