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02 January 2025 | Story Gerda-Marie van Rooyen | Photo Supplied
Prof Linus Franke
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.

News Archive

Innovation the focus of 28th Sophia Gray Memorial Lecture
2016-09-06

Description: Stratford furniture design Tags: Stratford furniture design

Stratford never lost his passion for designing
furniture. Pictured here is some of his furniture
exhibited at the Oliewenhuis Art Museum.
Photo: Francois van Vuuren: iFlair Photography

Al Stratford, designer, inventor and architect, presented the 28th Sophia Gray Memorial Lecture on 25 August at the Reservoir at the Oliewenhuis Art Museum in Bloemfontein. The event, hosted by the Department of Architecture at the University of the Free State, was also the opening of an exhibition of Stratford’s work.

In his career of 40 years, Stratford has patented many products and won several awards in industrial design and architecture. He is known in South Africa for his development of innovative building technology such as the Winblok Precast Concrete Window System. In 2009 and 2010, he also served as president of the South African Institute of Architects.

The title of his lecture was: Reductive Innovation in Architecture. Throughout his career, Stratford endeavoured – through his designs and inventions – to apply the principle of “reduction” to the building material he used and technology he examined.

Stratford designs and builds smart buildings
Stratford says a home is the paradigm of self-expression. His career as architect started with the building of five houses in Gonubie, near East London. Everything he knew about architecture at that stage, he had taught himself by reading on the subject at the local library. Later on, he achieved great heights in his career by designing and building, among others, the Stratford Guesthouse; the sustainable and resourcefully designed campus buildings for the University of Fort Hare (an institutional building not utilising any electrical air-conditioning); the Edenvale Baptist Church; and a community hall.

His technology is widely used in the building industry

“The arrogance in me gets humiliated when I
see what other people and God has done.”


His technical drawing skills, acquired at an early age during his training as motor mechanic, are still practised years later, particularly in his inventions. Stratford is the inventor of technology commonly used in the building industry today. Of these, the Winblok window system which he patented in 1981, is one of his best known patents. The use of these windows is characteristic of many of the buildings he designed and built. Other technology he invented and patented, includes the Winstep stairs, the Windeck flooring system, and the StratFlex furniture technology.

Furniture designs win him awards
He likes to quote architect Ludwig Mies van der Rohe: “A chair is a very difficult object. A skyscraper is easier.” Stratford started designing and manufacturing his own furniture and never lost this passion. In 2013, he won the Innovation Award at the Design Indaba for his “flat pack” furniture technology.

The humble Stratford – designer, inventor, industrialist, and architect – says he is simply playing around with God’s creation. “The arrogance in me gets humiliated when I see what other people and God has done.”

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