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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

Researcher at Qwaqwa Campus, Dr Aliza le Roux, selected as SAYAS member
2014-09-12

 

Dr Aliza le Roux

Dr Aliza le Roux, senior lecturer in the Department of Zoology and Entomology on the Qwaqwa Campus of the University of the Free State (UFS), was selected as a member of the 2014 South African Young Academy of Science (SAYAS). Dr Le Roux, a member of the Vice-Chancellor's Prestige Scholars Programme at the UFS, is also a South African National Research Foundation-rated (NRF) scientist (Y2) and the winner of the UFS Vice-Chancellor’s Excellence in Teaching Award in 2013.

She sees her selection to SAYAS as a unique opportunity to help change the face of science in South Africa. Dr Le Roux hopes to use her skills as project leader in social media, as well as her own learning experiences on a rural campus, to inspire especially ecological research in a country so rich in its own natural heritage.

The SAYAS selection committee was impressed by the high level of academic merit and depth of the nominations they received. “Your membership is critical in contributing to many of the vital activities and functioning of SAYAS, and we look forward to your active contributions to the further development and growth of the Young Academy,” said Prof Aldo Stroebel, Chair: SAYAS Selection Committee.

Prof Corli Witthuhn, Vice-Rector: Research at the UFS, said, “Aliza le Roux is an outstanding young scientist on our Qwaqwa Campus. She is not only an outstanding researcher but has also received prizes during the past year for her dedication to teaching. I am very excited about the young researchers on our Qwaqwa Campus with Aliza as one of the leaders, and I am looking forward to what else they can achieve in the next five years.”

In the past decade, Dr Le Roux focused her research on the cognitive and communicative skills of wild mammals in South Africa and Ethiopia. She spent four years as a postdoctoral research fellow at the University of Michigan, leading to ground-breaking research on the cognitive and communicative underpinnings of gelada monkey behaviour. Her current work encompasses an NRF-funded project on paternal care in bat-eared foxes, and experimental research on spatial cognition in wild samango monkeys. She is also involved in discussions with the Endangered Wildlife Trust to research the mitigation of road-kill incidents in South Africa.

Dr Le Roux hopes to combine cognitive ecology with more applied conservation questions in order to raise the profile of behavioural ecology as a discipline. She believes strongly in involving the public with scientific research, and has blogged for Nature Magazine on her adventures as field biologist. Her work has since found its way into numerous websites, magazine and newspaper articles and she has been interviewed on radio and BBC World.

Dr Le Roux will be inaugurated as SAYAS member on 14 October 2014.

Dr Marieka Gryzenhout from the Department of Plant Sciences is also a member of SAYAS.


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