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02 January 2025
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Story Gerda-Marie van Rooyen
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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.
UFS lecturer overcomes barriers to become world-class researcher
2016-09-05
Dr Magteld Smith researcher and deaf awareness
activist, from the Department of Otorhinolaryngology
at the UFS.
Photo: Nonsindiso Qwabe
Renowned author and disability activist Helen Keller once said the problems that come with being deaf are deeper and more far-reaching than any other physical disability, as it means the loss of the human body’s most vital organ, sound.
Dr Magteld Smith, researcher at the Department of Otorhinolaryngology (Ear, Nose and Throat) at the University of the Free State, said hearing loss of any degree can have psychological and sociological implications which may impair the day-to-day functioning of an individual, as well as preventing the person from reaching full potential. That is why Smith is making it her mission to bring about change in the stigmatisation surrounding deafness.
Beating the odds
Smith was born with bilateral (both ears) severe hearing loss, which escalated to profound deafness. But she has never allowed it to hinder her quality of life. She matriculated from a school for the deaf in 1985. In 2008 she received a cochlear implant a device that replaces the functioning of the damaged inner ear by providing a sense of sound to the deaf person which she believes transformed her life. Today, she is the first deaf South African to possess two masters degrees and a PhD.
She is able to communicate using spoken language in combination with her cochlear implant, lip-reading and facial expressions. She is also the first and only deaf person in the world to have beaten the odds to become an expert researcher in various fields of deafness and hearing loss, working in an Otorhinolaryngology department.
Advocating for a greater quality of life
An advocate for persons with deafness, Smith conducted research together with other experts around the world which illustrated that cochlear implantation and deaf education were cost-effective in Sub-Saharan Africa. The cost-effectiveness of paediatric cochlear implantation has been well-established in developed countries; but is unknown in low resource settings.
However, with severe-to-profound hearing loss five times higher in low and middle-income countries, the research emphasises the need for the development of cost-effective management strategies in these settings.
This research is one of a kind in that it states the quality of life and academic achievements people born with deafness have when they use spoken language and sign language as a mode of communication is far greater than those who only use sign language without any lip-reading.
Deafness is not the end
What drives Smith is the knowledge that deaf culture is broad and wide. People with disabilities have their own talents and skills. All they need is the support to steer them in the right direction. She believes that with the technological advancements that have been made in the world, deaf people also have what it takes to be self-sufficient world-changers and make a lasting contribution to humanity.