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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

Kesa and Wayde biggest stars at KovsieSport Awards

2017-10-03

Description: 'Awards KovsieSport 2017 Tags: Awards KovsieSport 2017

Wayde van Niekerk was unable to attend the KovsieSport Awards.
Steven Swarts, his stepfather, received the award for KovsieSport
Senior Sportsman of the Year from Prof Francis Petersen (left),
Rector and Vice-Chancellor of the University of the Free State,
on his behalf.
Photo: Mlungisi Louw/Volksblad

It took Kesa Molotsane seven years of hard work and patience to excel, and all this time she has been a Kovsie. Unlike some other sporting greats, success didn’t come overnight for her.

The star athlete had an amazing year and was crowned KovsieSport Senior Sportswoman of the Year, while Wayde van Niekerk is the KovsieSport Senior Sportsman of the Year for a fifth consecutive time. The 400 m Olympic Champion surpassed the record held by himself and Franz Kruger for most successive sports awards for men (four), and equalled Kruger’s record (five) for the most men’s titles overall.

Blose and Chawane top juniors

The cream of the crop was honoured at the KovsieSport Awards, held in collaboration with the Volksblad Free State Sport Stars Awards, at Monte Bello in Bloemfontein on 27 September 2017.

Kwenzo Blose, who represented the South African U20 rugby team at the Junior World Cup, was named Junior Sportsman for a second consecutive year. The netball player Khanyisa Chawane is the KovsieSport Junior Sportswoman of the Year. She captained the South African U21 netball team at the World Youth Netball Champs.

The blind athlete Louzanne Coetzee and her guide Khothatso Mokone received a Special Award for Disabled Sport. Coetzee took part in the Paralympic Games and has set many records, such as in the 5 000 m (T11).

Hard work over many years

Molotsane competed at the World Cross-country Championships in Kampala, is the leader of the Spar Women’s Grand Prix 10 km series, and represented South Africa at the World Student Games. The Assistant Officer at KovsieSport says being the best female athlete is humbling.

“It took me long enough to get here and it needed a lot of work from my side over many years. I have been with Kovsies for, like, seven years and I am only getting this after so long.”
She also commended Karla and Tanya Mostert who was nominated with her. “Karla has been a motivation for little kids from primary school up until high school learners. She has always been there and knows what it means to really be a sport star.

“And her younger sister Tanya is the upcoming one. It is amazing to be on stage with both of them.”

KovsieSport Awards:
• Participants in World Student Games in Tapei: Arné Nel (tennis), Hendrik Maartens (athletics), Janke van der Vyver (badminton), Kesa Molotsane (athletics), Lienke de Kock (tennis), Maryke Brits (athletics), Rynardt van Rensburg (athletics), Tsepang Sello (athletics).
• Special Award for Disabled Sport: Louzanne Coetzee and Khothatso Mokone
• Special Awards: Maryka Holtzhausen (netball), Janine de Kock, Marnus Kleinhans (tennis), Ans Botha, Rufus Botha (both athletics), Nicole Walraven (hockey) and Godfrey Tenoff (soccer)
• Junior Sportswoman of the Year: Khanyisa Chawane (netball)
• Junior Sportsman of the Year: Kwenzo Blose (rugby)
• Senior Sportswoman of the Year: Kesa Molotsane (athletics)
• Senior Sportsman of the Year: Wayde van Niekerk (athletics)

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