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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 Faculty of Theology and Jonathan Edwards Centre at Yale University forge strategic partnership

2009-06-10

Prof. Francois Tolmie, Dean of the UFS’s Faculty of Theology.
Photo: Supplied

The Faculty of Theology at the University of the Free State (UFS) will establish a Jonathan Edwards Centre for Southern Africa, affiliated with the Jonathan Edwards Center at Yale University in New Haven in the United States of America.

This strategic partnership exemplifies the vision of the Faculty of Theology to be an internationally renowned theological and training faculty.

The UFS Jonathan Edwards Centre will serve as a research, education and publication hub for the study of Edwards and evangelical history and develop links with the international academic community.

Prof. Francois Tolmie, Dean of the Faculty of Theology at the UFS, said, “I welcome the plans to pay sustained critical attention to Edwards’s thought. Jonathan Edwards was an important American theologian, philosopher and more specifically America's greatest contributor to mission theology in Southern Africa.”

Dr Kenneth Minkema, Executive Director of the Jonathan Edwards Center at Yale University, adds: “The establishment of the Jonathan Edwards Center Southern Africa at the UFS in Bloemfontein is a significant expansion of Edwards scholarship and will serve widely both academia and the church.”

Jonathan Edwards (1703-1758), pastor, revivalist, Christian philosopher, missionary, and president of Princeton University, is widely regarded as North America’s greatest theologian. He is the subject of intense scholarly interest because of his significance as an historical figure and the profound legacy he left on America’s religious, political and intellectual landscapes.

In recent years, a rapidly growing interest in Edwards as theologian has brought the man and his writings onto the world stage, pressing beyond the popular and more parochial image of Edwards primarily as American preacher and American historic figure. Increasingly, his writings are being consulted by religious leaders, pastors, and churches around the world, spurred by a growing recognition of the fervency and universality of the Edwards message and the acumen with which he appraised religious experience.

This interest in Edwards globally has been fuelled in part by the work of the Jonathan Edwards Centre at Yale University, whose sole mission is to support inquiry into the life, writings, and legacy of Jonathan Edwards by providing resources that encourage critical appraisal of the historical importance and contemporary relevance of America’s premier theologian. The primary means to achieve this is with the The Works of Jonathan Edwards Online, a digital learning environment for research, education and publication that presents all of Edwards’s writings, along with helpful editorial materials that allow the reader to examine Edwards's thought in incredibly powerful, useful ways. The Works of Jonathan Edwards Online 2.0 is accessible through the Centre’s website at: www.edwards.yale.edu.

Media Release:
Mangaliso Radebe
Assistant Director: Media Liaison
Tel: 051 401 2828
Cell: 078 460 3320
E-mail: radebemt.stg@ufs.ac.za
10 June 2009

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