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02 January 2025
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Story Gerda-Marie van Rooyen
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Photo Supplied
Leading the research in South Africa is Prof Linus Franke from the Department of Soil, Crop and Climate Sciences.
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.
Kovsies paint Bethlehem red!
2010-03-20
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At the matric evening of the Secondary School Witteberg in Bethlehem were, from the left: Lebogang Motaung; Rozelle Venter; Prof. Jonathan Jansen, Rector and Vice-Chancellor of the UFS; Ernest Bezuidenhout; Donald Motaung; and Mr Rudi Buys, Dean of Student Affairs at the UFS.
Photo: Lynda Greyling |
“The learners of the High School Witteberg are a wonderful example of the quality of students that we can expect as first years here at Kovsies next year,” Prof. Jonathan Jansen, Rector and Vice-Chancellor of the University of the Free State (UFS) said last night during a matric evening attended by 121 Grade 12 learners and their parents in a packed hall at the Secondary School Witteberg in Bethlehem.
Prof. Jansen and his wife Grace, as well as some of his colleagues were guests of honour at the event.
“We want to make a difference in the lives of our students at Kovsies and we want to ensure that our students make a difference in a divided world. This is why I want each Grade 12 learner who is here tonight to come and study at the UFS,” he told the learners and their parents.
“The UFS is going to become the university in the country that is serious about quality. We want to draw the best students. Quality entails hard work. It is about perseverance and your commitment towards your studies. That is the type of students we want.”
“My door is open to our students and they have access to come and talk to me. I also regularly sit at different places on the campus and then invite students to come and talk to me. I want our students to feel at home here.”
“I also want our students to feel free to talk about the use of language at the UFS. We love Afrikaans, English and Sesotho and are not going to fight about language. We are going to develop the use of Afrikaans so that more students can speak it – and this also goes for English and Sesotho.”
Prof. Jansen said that Kovsie students had to be balanced students. “Our students must also excel in sport, art, etc., because the development of students who are properly prepared for the workplace is what we strive for as a tertiary institution. Therefore we are going to establish an office that assists students in their career preparation and will offer students internships so that they can come into contact with leading firms in the commerce and industry sectors.”
“However, we shall also actively enhance our students’ learning experience and therefore we are going to send a group of first-year students overseas in the second semester this year to gain knowledge about issues like integration and collaboration.”
At the occasion Prof. Jansen announced that bursaries to study at the UFS in 2011 would be awarded to the two top Grade 12 learners of the school.
The Secondary School Witteberg had a 100% pass rate in the Grade 12 final examinations the past few years. In 2009 the school was seventh amongst the top 50 schools in the Free State Province. Five learners from the school were also amongst the top 20 learners in the Province last year. The school has already produced many top students for the UFS.
Mediaverklaring
Issued by: Lacea Loader
Director: Strategic Communication (acting)
Tel: 051 401 2584
Cell: 083 645 2454
E-mail: loaderl@ufs.ac.za
18 March 2010