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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

SRC elections: A first for UFS main campus

2005-08-14

Students on the main campus of the of the University of the Free State (UFS) will this week for the first time vote for the Student Representative Council (SRC) using two voting systems: proportional representation (PR) and first-past-the-post.

According to the Vice-Rector, Student Affairs, Dr Ezekiel Moraka, this year’s elections are a milestone for the UFS as it will be the first time that the main campus SRC will be elected according to the amended SRC constitution, which was approved by the UFS Council in June 2005.

“It is also a major breakthrough for student governance and transformation of the UFS main campus and constitutes a legitimate basis for the democratic participation of all students at the UFS main campus in the governance of the university,” said Dr Moraka.

The amended constitution of the main campus SRC determines that nine of the 18 SRC members must be elected by means of proportional representation and nine on the basis of an individual, first-past-the-post election.

According to Dr Moraka, the introduction of the proportional representation system follows earlier calls by some student formations, notably Sasco and the ANC Youth League, for such a system to be introduced at the UFS main campus in Bloemfontein.

The new main campus SRC constitution is the result of consensus reached during a lengthy negotiation process involving diverse student formations such as Sasco, the ANC Youth League, the Young Communist League, the ACDP, HEREXVII, KovsieAlliance, as well as the democratically elected SRC members of the main campus.

“Independent persons such as Mr Jack Klaas and Mr Kobus van Loggerenberg, a former SRC President, facilitated the negotiation process,” said Dr Moraka.

Students on the main campus in Bloemfontein will vote for a new SRC on Monday 15 August 2005.

SRC elections will also take place on the other two campuses of the UFS, which have their own SRC structures.

Students on the UFS-Vista campus in Bloemfontein will vote for a new SRC on Monday 15 August 2005 and Tuesday 16 August 2005.

At the Qwaqwa campus of the UFS, students will vote for a new SRC on Friday 26 August 2005.

The election processes on all three campuses will be closely monitored by independent electoral bodies.

After the three campuses have elected their respective SRCs a central SRC will be constituted. The central SRC will have 12 members made up of delegates of the three campus SRCs, including the presidents of these three SRCs. The main campus will have five representatives, the Qwaqwa campus will have four representatives and the Vista campus will have three representatives.

Main campus voting schedule:
Monday 15 August 2005 from 07:00-21:00. Ten voting stations will be set up across the campus. The results will be announced on Tuesday 16 August 2005.

Vista campus voting schedule:
Monday 15 August 2005 and Tuesday 16 August 2005 from 09:00-18:00 in the administration building. The results will be announced on Wednesday 17 August 2005.

Qwaqwa campus voting schedule:
Friday 26 August 2005 from 09:00-18:00 in the Senate Hall. If there is no objection to the final results, it will be announced on the same day.

Media release

Issued by:  Lacea Loader
   Media Representative
   Tel: (051) 401-2584
   Cell: 083 645 2454
   E-mail: loaderl.stg@mail.uovs.ac.za

14 August 2005

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