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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

School of Medicine – heartbeat of the UFS
2015-06-24

Photo: Charl Devenish

During the past year, the School of Medicine at the University of the Free State celebrated several successes in the field of research and cooperation agreements. These successes allow the school to continue delivering world-class teaching to some of the country’s top students.

Earlier this year, a research team from the Department of Medical Microbiology under the guidance of Prof Felicity Burt, received a grant of R500 000 to conduct research on Congo fever (CCHF). Prof Burt is an internationally-recognised expert on Congo fever. The funding that has been awarded will be used to profile immune responses against CCHF viral proteins, and investigate mechanisms and strategies to enhance these immune responses. This study may contribute to the development of a vaccine against this deadly virus.

Prof Stephen Brown from the Department of Paediatrics and Child Health’s expertise and commitment to paediatric cardiology gained him the title of Bloemfonteiner of the Year. Under the leadership of Prof Brown, the department has performed many breakthrough operations and procedures. The most recent of these, was the first hybrid procedure in the country which was performed in November 2014. The department also has an ultramodern hybrid heart catheterisation suite.
 
Prof William Rae from the Department of Medical Physics focuses on medically-applied radiation. Together with his department, they are looking at quantitative radiation dosages. The research is particularly crucial for the successful treatment of cancers. Through this research, it is possible to ensure that patients receive the appropriate radiation dosages in order to obtain the desired effect without the patient being affected negatively.

Dr Nathanial Mofolo, Head of the Department of Family Medicine in the School of Medicine, is since 2006 involved at various levels of hospital management regarding quality assurance, patient safety, clinical and infection management, as well as administration. He is currently curator of internal medical students for four of the UFS’s teaching hospitals. His department is currently focusing on the National Health Plan, HIV and tuberculosis, teaching and learning, as well as service delivery in family medicine.
 
Prof Francis Smit manages the team that, to their knowledge, decellularised the first primate heart. The method has been applied successfully on rat and pig hearts by researchers in America. Recently the team also successfully cultivated beating heart cells ? those of a rat ? in their laboratories. The research is in line with what researchers in Europe and America are working on. In the long run, the research project aims to attempt ‘building’ a heart that could be used for the purposes of organ donation.

The UFS is also home to the only metabolic research unit in the country. The unit was established to focus research on obesity, type II diabetes, metabolic bone diseases and all related diseases. This includes diseases such as diabetes, cholesterol, cancer, psoriasis, lymphoedema, fatigue, high blood pressure, gout, arthritis, fibrosis, skin disorders, PMT, migraine, insomnia, gall and kidney stones and related infections, and obstructive sleep apnea. The unit is a joint initiative between the UFS and Christo Strydom Nutrition. Mr Christo Strydom, a nutritionist and world renowned in the treatment of lymphoedema, invested R5 million in the establishment of this unit at the UFS.  Christo Strydom is also the founder and owner of Christo Strydom Nutrition.

The School of Medicine at the University of the Free State is the only unit on the continent offering in-depth modules in clinical simulation. The Clinical Simulation Unit on the Bloemfontein Campus of the UFS, headed by Dr Mathys Labuschagne, is regarded as the flagship unit of the school and boasts high-technology equipment where students can practice their clinical skills before applying those skills in the real world.
 

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