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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

State of our campuses: UFS extends vacation as from 28 September until 7 October 2016

2016-09-28

In solidarity with the call for free education for the poor and missing middle, a discussion was held with the University Management Committee this morning, in consultation with the student leadership, and after careful assessment of operational matters on all three campuses of the University of the Free State (UFS), we agreed upon the following:

1.    All classes, tests, and assignments will be suspended until Friday 7 October 2016. This means that the university will close on Wednesday 28 September 2016 for an extended vacation until 7 October 2016. The academic programme will resume on Monday 10 October 2016.

2.    This will allow the entire university time to demonstrate solidarity, in collaboration with student leadership, academic and support staff, and the broader community in support of free higher education for the poor and missing middle.

3.    The administration of the university will continue on Thursday 29
September 2016, and staff will have access to their offices to plan the additional academic support for students, to consider the re-scheduling of the academic calendar, to engage with the Department of Higher Education and Training in relation to the students’ demands, and to continue with support services during the extended vacation.

4.    The university management and student leadership will also, over the next three days, engage in discussions to provide for a platform that is conducive to continued collaboration between students and the university leadership.

5.    The suspension of tests, classes, and assignments will also allow time for a social compact and code of ethics for protests to be agreed upon and signed between student leadership and the university management.

In respect of the Qwaqwa Campus, some protesting students yesterday intimidated others and forcibly removed staff, as well as security personnel. Today, university property was burnt. In view of our commitment to the safety of staff, students, and university property at the campus, it was necessary to evacuate the campus – including residences – with immediate effect. However, residential students are allowed to remain on campus until midday tomorrow (28 September 2016).

The university leadership again wants to emphasise its support for a national policy of free education for the poor and missing middle and stresses its support for peaceful protests on matters that are of concern to our students.

We further understand the frustration of many students and their parents/guardians at the closure of the campuses and the impact it has on academic staff, staff in the Support Services, our security personnel, teaching, learning, projects, assignments, lectures, tests, fieldwork, and the academic calendar in general, and commit to do all in our power to ensure the delivery of quality education to all our students under difficult circumstances.

Released by:
Lacea Loader (Director: Communication and Brand Management)
Telephone: +27 51 401 2584 | +27 83 645 2454
Email: news@ufs.ac.za | loaderl@ufs.ac.za
Fax: +27 51 444 6393

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