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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 appoints new council members

2004-06-07

The council of the University of the Free State (UFS) last week appointed two new council members. One of the members, Mrs Busiswa Tshabalala, will represent the Qwaqwa community. It is the first time since the incorporation of the Qwaqwa into the UFS campus last year that a council member was elected to represent the Qwaqwa community.

Mrs Tshabalala obtained her BA Hons in History from the University of the North’s Qwaqwa campus in 1992 and a B Ed degree in leadership management from the UFS in 1998. She was the first female deputy principal at the Harrismith Secondary School (1989-1992) and principal of the Forty Second Hill Teachers’ Centre in the Vrede area office of the Free State Department of Education. In 2001 she was seconded by the Free State Department of Education to coordinate programme 1 and 2 for Link Community Development. She is currently the director of the Thabo Mofutsanyana education district of the Free State Department of Education.

Dr Susan Vosloo, international acclaimed cardiologist, is the other new member of the council. Dr Vosloo, old Kovsie of the year 1989, obtained the MB Chb degree in 1980 at the UFS, an M Med cardiothoracic surgery and in 1998 the FCS (SA) qualification in cardiothoracic surgery at the College of Medicine of South Africa (CMSA). Dr Vosloo’s career extends over a wide spectrum and she specialises in pediatric and adult cardiothoracic surgery. In 1993 she took part in the first heart transplant in Johannesburg at Milpark Hospital, in 1997 she did the first hear-lung transplant at City Park Hospital in Cape Town and in 1997 a heart transplant on a 3-year old child.

She has a cardiothoracic surgery at the Christiaan Barnard Memorial Hospital in Cape Town since 1991 and in also part-time involved with the Red Cross Memorial Hospital in Cape Town.

“It is a great honour for the UFS to welcome two women with so much expertise and experience on the council. Their presence strengthens the UFS’s continued effort to transform the council,” said judge Faan Hancke, chairperson of the UFS council..

Both Mrs Tshabalala and Dr Vosloo’s appointments are until June 2008.

The following council members have been re-elected until June 2008:

Prof Dines Gihwala - vice-chairperson of the council
Dr Nathan Bagarette
Dr Frans Kotzé

Dr Kobus Laubscher was elected by the donors as representative for a further term until June 2008. Me Winifred Hoexter was elected by the Alumni as the third representative. She has been a foundation donor of the UFS since 1997 and committee member of the Kovsie Alumni Trust since 2000. Me Hoexter’s term is until June 2008. The other Alumni representatives are judge Faan Hancke and Mr Jan Grobler, whose term is until June 2006.

Issued by: Lacea Loader
Media Representative
Tel: (051) 401-2584
Cell: 083 645 2454
E-mail: loaderl.stg@mail.uovs.ac.za

7 June 2004

Mrs Busiswa Tshabalala

Dr Susan Vosloo

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