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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

Reitz colleagues start their own company

2014-07-01

The University of the Free State (UFS) and the five colleagues implicated in the Reitz incident of 2008 reached the final chapter in the reparation process in restoring the dignity of these colleagues on Thursday 19 June 2014.

Mr Mothibedi Molete and Mss Mankoe Naomi Phororo, Emmah Koko, Nkgapeng Adams and Sebuasengwe Mittah Ntlatseng, former cleaning staff at the UFS, are now the directors of their own cleaning company, Mamello Trading.

Furthering on its promise to assist the new-found company, the UFS has also appointed Mamello Trading as a service provider responsible for services at its South Campus.

It has been six years since the Reitz incident at the UFS and Dr Choice Makhetha, Vice-Rector: External Relations, described the journey of the past six years as a learning experience for all the stakeholders.

“This journey continues as there is still work to be done, but every milestone achieved, deserves a celebration like today’s,” Dr Makhetha said.

In 2010 the UFS signed a deed of settlement with the colleagues which committed the UFS to help them establish a cleaning company. This was followed by a reconciliation ceremony in 2011.

In 2012 the UFS assisted with the registration of the company Mamello Trading.

Dr Makhetha explained that in 2013 the UFS assisted in training the new directors and mentoring them for 12 months.

Earlier this year, Mamello Trading signed a cleaning contract of four years with the UFS. Three of the directors’ daughters also received bursaries and are currently studying at the UFS.

Advocate Mohamed Ameermia, Commissioner at the Human Rights Commission, congratulated the management of the UFS on the reparation and reconciliation process they followed in restoring the dignity of the five colleagues.

The directors of Mamello Trading each had a special message of their journey and thanks. Their messages were as follows:

Rebecca Adams – After the video was exposed, I was hurt and was psychologically affected. By offering their apologies to us, the four students indicated that what they had done was a mistake. As a parent, when a child apologises you must accept that apology.
Emma Koko – I was shocked after the video was shown in public. I had a mother-child-like relationship with one of the students and that video tarnished my image as a human being. During the time of reconciliation these students showed remorse for what they had done.
David Molete – I was devastated, hurt and fearful to meet people. I ended up at a psychiatric hospital and attended counseling services which helped me to heal. The students apologised and I accepted because they were sincere.
Mittah Ntlaseng – The video impacted negatively on my dignity. The UFS assisted us with visits to psychologists. Now I feel I am a business owner and it is an opportunity for me to rebuild my self-esteem.

Naomi Phororo – Mamello Trading is a business venture which is going to bring changes to our lives and families. The training I have received has enabled me to know how to manage the business.

Issued by: Lacea Loader (Director: Communication and Brand Management)
Telephone: +27(0)51 401 2584
Fax: +27(0)51 444 6393
E-mail: news@ufs.ac.za

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