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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

The silent struggles of those with invisible disabilities
2016-12-13

Description: Dr Magteld Smith, invisible disabilities Tags: Dr Magteld Smith, invisible disabilities 

Dr Magteld Smith, researcher and deaf awareness
activist, from the Department of Otorhinolaryngology
at the UFS.

December is International Disability Awareness Month. Despite equality before the law and some improvements in societal attitudes, people with disabilities are still disadvantaged in many aspects of their lives. They are more likely to be the victims of crime, sexual abuse, are more likely to earn a low income or be unemployed, and less likely to gain qualifications than people without disabilities.

Demystifying disabilities is crucial

Dr Magteld Smith, a researcher at the University of the Free State (UFS) School of Medicine’s Department of Otorhinolaryngology, says that often people think the term “disability” only refers to people using a wheelchair, etc. However, this is a misperception because some individuals have visible disabilities, which can be seen, and some have invisible disabilities, which can’t be seen. Others have both visible and invisible disabilities. There is an ongoing debate as to which group has the greatest life struggles. Those with visible disabilities frequently have to explain what they can do, while individuals with invisible disabilities have to make clear what they cannot do.

Invisible disability is an umbrella term that captures a whole spectrum of invisible disabilities and the focus is not to maintain a list of specific conditions and diagnoses that are considered invisible disabilities. Invisible disabilities include debilitating fatigue, pain, cognitive dysfunctions, mental disorders, hearing and eyesight disabilities and conditions that are primarily neurological in nature.

Judging books by their covers
According to Dr Smith, research indicates that people living with invisible disabilities often suffer more strained relationships than those with visible disabilities due to a serious lack of knowledge, doubts and suspicion around their disability status.

Society might also make serious allegations that people with invisible disabilities are “faking it” or believe they are “lazy”, and sometimes think they are using their invisible disability as an “excuse” to receive “special treatment”, while the person has special needs to function.

Giving recognition and praise
“One of the most heartbreaking attitudes towards persons with invisible disabilities is that they very seldom enjoy acknowledgement for their efforts and accomplishments. The media also seldom report on the achievements of persons with invisible disabilities,” says Dr Smith.

Society has to understand that a person with a disability or disabilities is diagnosed by a medical professional involving various medical procedures and tests. It is not for a society to make any diagnosis of another person.

Dr Smith says the best place to start addressing misperceptions is for society to broaden its understanding of the vast, varying world of disabilities and be more sensitive about people with invisible disabilities. They should be acknowledged and given the same recognition as people with visible disabilities.

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