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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 closes campuses until Friday 28 October 2016 to readjust academic programme

2016-10-13

The senior leadership of the University of the Free State (UFS) has carefully analysed all the risks facing the university in the current national crisis in higher education, which includes the possibility of losing the academic year. The university management has been engaged in back-to-back meetings with the student leadership, South African Police Service (SAPS), and other stakeholders over the past two days in an attempt to ensure the safety of all parties, and normalise the academic functioning of the UFS. Unfortunately, we have been unable to arrive at an agreement about the resumption of the academic year regardless of the timing of the government response to students’ demands. This is further complicated by the fact that the university has received notice of intention of an interdict to reopen with immediate effect.

Taking all of this into account, the senior leadership of the UFS has decided as follows:

The UFS will not be shutting down for the remainder of 2016. The Bloemfontein and South Campuses will, however, be shutting down from Thursday 13 October 2016 until Friday 28 October 2016. These two weeks will be used for crucial and complex arrangements to be put in place to readjust the academic calendar and ensure that all students can complete their studies.
The academic arrangements are focused on organising alternative modes of delivery of our programmes to support student learning. Academics will be working on readjusting their course materials for this purpose.
The Bloemfontein Campus and the South Campuses will be closed for undergraduate and honours students. Administrative and academic staff will be working, as well as master's and doctoral students.
Students in residence will have to vacate their rooms by 12:00 on Saturday 15 October 2016. Students who need help in this regard must please contact +27 51 401 2001 or send an email to hotline@ufs.ac.za.
Arrangements will be made to accommodate international, master's, and doctoral students.
The specific information about academic programmes will be communicated to students by their respective faculties as it becomes available.

The senior leadership wants to restate its commitment to free education as well as its willingness to stand together with students and other public universities to impress on government the urgency to decide on a time frame for the roll-out of free higher education for the poor and missing middle. During these two weeks the UFS will meet with the leadership of Universities South Africa to coordinate collective action in this regard.

Consistent with this commitment the UFS leadership will roll out a series of activities to inform and educate students and the general public on different models and experiences of providing free higher education.

The UFS is deeply concerned about the possible securitisation of our campus as a way of solving this crisis.

The UFS condemns in the strongest terms violence as a methodology to achieve ends in the context of a democratic state.We are, as always, committed to providing quality education and a conducive environment for learning.

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