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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

Inaugural lecture: Prof. Annette Wilkinson
2008-04-16

A strong plea for a pursuit of “scholarship” in higher education

Prof. Annette Wilkinson of the Centre for Higher Education Studies and Development in the Faculty of the Humanities at the University of the Free State (UFS) made as strong plea for a pursuit of “scholarship” in higher education.

She said in her inaugural lecture that higher education has to deal with changes and demands that necessitate innovative approaches and creative thinking when it concerns effective teaching and learning in a challenging and demanding higher education environment. She referred to a recent research report prepared for the Council for Higher Education (CHE) which spells out the alarming situation regarding attrition rates and graduation output in South African higher education and emphasises factors leading to the situation. These factors include socio-economic conditions and shortcomings in the school and the subsequent under preparedness of a very large proportion of the current student population. However, what is regarded as one of the key factors within the sector’s control is the implementation of strategies for improving graduate output.

She said: “The CHE report expresses concern about academics’ adherence to traditional teaching practices at institutions, which have not changed significantly to make provision for the dramatic increase in diversity since the 1980s.

“Raising the profile of teaching and learning in terms of accountability, recognition and scholarship is essential for successful capacity-building,” she said. “The notion of scholarship, however, brings to the minds of many academics the burden of ‘publish or perish’. In many instances, the pressures to be research-active are draining the value put on teaching. Institutions demand that staff produce research outputs in order to qualify for any of the so-called three Rs – resources, rewards and recognition.

“These have been abundant for research, but scarce when it comes to teaching – with the status of the latter just not on the same level as that of research. From within their demanding teaching environments many lecturers just feel they do not have the time to spend on research because of heavy workloads, that their efforts are under-valued and that they have to strive on the basis of intrinsic rewards.”

She said: “It is an unfortunate situation that educational expertise, in particular on disciplinary level, is not valued, even though in most courses, as in the Programme in Higher Education Studies at the UFS, all applications, whether in assignments, projects or learning material design, are directly applied to the disciplinary context. We work in a challenging environment where the important task of preparing students for tomorrow requires advanced disciplinary together with pedagogical knowledge.”

Prof. Wilkinson argued that a pursuit of the scholarship of teaching and learning holds the potential of not only improving teaching and learning and consequently success rates of students, but also of raising the status of teaching and recognising the immense inputs of lecturers who excel in a very demanding environment. She emphasised that not all teaching staff will progress to the scholarship level or are interested in such an endeavour. She therefore suggested a model in which performance in the area of teaching and learning can be recognised, rewarded and equally valued on three distinct levels, namely the levels of excellence, expertise and scholarship. An important feature of the model is that staff in managerial, administrative and support posts can also be rewarded for their contributions on the different levels for all teaching related work.

Prof. Wilkinson also emphasised the responsibility or rather, accountability, of institutions as a whole, as well as individual staff members, in providing an environment and infrastructure where students can develop to their full potential. She said that in this environment the development of the proficiency of staff members towards the levels of excellence, expertise and scholarship must be regarded as a priority.

“If we want to improve students’ success rates the institution should not be satisfied with the involvement in professional development opportunities by a small minority, but should set it as a requirement for all teaching staff, in particular on entry into the profession and for promotion purposes. An innovative approach towards a system of continuous professional development, valued and sought after, should be considered and built into the institutional performance management system.”

As an example of what can be achieved, Prof. Wilkinson highlighted the work of one of the most successful student support programmes at the UFS, namely the Career Preparation Programme (CPP), implemented fourteen years ago, bringing opportunities to thousands of students without matric exemption. The programme is characterised by dedicated staff, a challenging resource-based approach and foundational courses addressing various forms of under preparedness. Since 1993 3 422 students gained entry into UFS degree programmes after successfully completing the CPP; since 1996 1 014 of these students obtained their degrees, 95 got their honours degrees, 18 their master’s degrees and six successfully completed their studies as medical doctors.

Prof. Wilkinson said: “I believe we have the structures and the potential to become a leading teaching-learning university and region, where excellence, expertise and scholarship are recognised, honoured and rewarded.”

 

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