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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

Council approves Transformation roadmap

2007-06-08

The Council of the University of the Free State (UFS) today (Friday 8 June 2007) approved a comprehensive Transformation Plan in an effort to deepen and accelerate transformation at the UFS.

According to the Rector and Vice-Chancellor of the UFS, Prof. Frederick Fourie, transformation projects will be undertaken in key areas of university life, such as:

the institutional culture of the UFS;
the core academic business of the university ;
governance and management of the institution;
as well as a specific focus on employment equity.

Prof. Fourie said the UFS now has a very comprehensive transformation roadmap of what must be done, when it must be done and who is responsible for implementation.

“In other words, we have a do-able plan of action”, said Prof. Fourie. He said the plan is based on the belief that the UFS should treasure diversity as a source of strength and quality.

The plan is an outcome of several consultative processes, including the work of a Transformation Plan Task Team that was specifically established to do the initial thinking and liaison with stakeholders to map out critical transformation issues.
He said the overarching objective of the plan is to establish the UFS as an excellent, non-racial, non-sexist, multicultural and multilingual university, where all staff and students can experience a sense of belonging.

Prof. Fourie said one of the top priority projects of the plan has already been achieved, namely the approval by the UFS Council of new policy guidelines to increase diversity in student residences.

The new policy guidelines were approved by the Council today (Friday 8 June 2007) and are grounded in an educational approach that is grounded in the benefits of learning and living in a diverse environment.

Other projects outlined in the Transformation Plan include among others:

ongoing diversity sensitisation for staff and students
an investigation into the possibility of a diversity module for first year students
a project to establish the key elements of and ways of cultivating a sense of belonging among staff and students.

In the academic terrain the plan seeks to heighten the responsiveness of the UFS as a research institution specifically with regard to the New Partnership for Africa’s Development (NEPAD), the Millennium Development Goals of the United Nations as well as the Accelerated and Shared Growth Initiative for South Africa (ASGISA), and the HIV/AIDS pandemic among others. The inclusion of indigenous knowledge systems in curricula as far as is possible will also be investigated.

Media release
Issued by: Lacea Loader
Assistant Director: Media Liaison
Tel: 051 401 2584
Cell: 083 645 2454
E-mail: loaderl.stg@ufs.ac.za
8 June 2007

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