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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

UFS student government elections declared free and fair

2015-09-04

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Video: SRC announced (Bloemfontein Campus)

The 2015/2016 Student Representative Council (SRC) elections on the Bloemfontein and Qwaqwa Campuses of the University of the Free State (UFS) have been declared free and fair.

The institutional Independent Election Commission Chairperson, Mandla Ndlangamandla, commended the high level of cooperation displayed by all students who participated in the peaceful and organised elections on the Qwaqwa Campus.

“We are proud to indicate that from the beginning of the election process, there were no incidents of intimidation, disruption, threats, and violence that were reported,” he said.

Announcing the election results at Bloemfontein Campus, the representative of the Electoral Commission of South Africa (IEC), Andrew Ndelele, also confirmed that the commission had ensured that the elections were credible.

Voter turn-out increased at both campuses compared to the previous year. The elections, which took place from Friday 28 August to 1 September 2015, saw 8% and 0.7% increases in votes casted at the Qwaqwa and Bloemfontein Campuses, respectively.

Paseka Sikhosana, President-elect of the Qwaqwa Campus, commended the unity and orderliness displayed by students: “After the polling stations had closed, we came together and sang in peace”.

Incoming SRC President of the Bloemfontein Campus, Lindokuhle Ntuli, also endorsed the impartiality of the elections, while expressing how humbled he was by the support he received during the campaigning period.

Bloemfontein elective portfolios:

Bloemfontein Campus president: Lindokuhle Ntuli
Photo: Johan Roux

President: Lindokuhle Ntuli
Vice-President: Mpho Khati
Secretary: Tsietso Mafaso
Treasurer: Katleho Masheane
Culture: Delia Moumakwe
Sport: Kabelo Elijah Noosi
Transformation: Katleho Mmolayeng Letube
Student Accessibility and Support: Victor Fana Sejane
Media and Marketing: Peo Morwesi Segano
First-generation students: Nicola King
Legal and Constitutional Affairs: Luke Harrold Small
Student Development and Environment: Karabo Pheko

Bloemfontein ex officio portfolios:

Associations Student Council: Sikhulekile Luwaca
Academic Affairs Student Council: Letsika Liqoalane
Campus Residences Student Council: Ingrid Wentzel
Commuter Student Council: Audrey Sithebe
Postgraduate Student Council: Kamogelo Dithebe
International Student Council: Takudzwa Gezi
Student Media Council: Hatsu Mphatsoe
Rag Fundraising Council: Tubatsi Moloi
Rag Community Service Council: Johan Diedericks

Qwaqwa Campus president: Paseka Sikhosane
Photo: Thabo Kessah

Qwaqwa elective portfolios:

President: Paseka Sikhosane
Vice-President: Zethu Mhlongo
Secretary: Nondumiso Langa
Treasurer: Palesa Selepe
Student Development and Environmental Affairs: Lindokuhle Ngubane
Media and Publicity: Bongiwe Buthelezi
Politics and Transformation: Nthabiseng Mokoena

Qwaqwa ex officio portfolios:

Academic Affairs: Edward Nkadimeng
Arts and Culture: Kwenzakwenkosi Mthethwa
Sports Affairs: Thabo Zengele
Rag and Dialogue: Dieketseng Mokoena
Religious Affairs: Mamosebetsi Mokoena
Residence Affairs: Pheletso Moekoa
Off-Campus: Nicholas Sibeko

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