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The holy grail of potatoes

02 January 2025 | Story Gerda-Marie van Rooyen | Photo Supplied

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

University community join hands in the walk for peace and justice

2016-03-02

The Campus Ministries Forum and South African Council of Churches (Free State) have organised a walk for peace and justice from the Main Building to the Callie Human Centre on the Bloemfontein Campus of the University of the Free State (UFS) on Tuesday 1 March 2016. This walk was followed by a prayer meeting at the Callie Human Centre.

Pastors from the Campus Ministries Forum of the South African Council of Churches (Free State) led a group of more than 350 students and staff in praise and worship, followed by prayers in English, Afrikaans, and Sesotho.

A significant gesture at the event was the church leader’s plea for peace and solutions for the conflict at the UFS.

Bishop Monty Mabale, Chairperson of the South African Council of Churches, read an extract from the declaration compiled by the pastors ministering to staff and students at the UFS.

“We are saddened by the violence and vandalism that took place on and off campus. We understand that there are many reasons for frustration and anger, which lead to tensions at the end of last year and again now. We also understand that there are different perspectives on these developments and the complexities underlying to this. However, we cannot agree with the hate speech, the continuous blaming of others, the instigation of violence, and the damage being caused to this precious institution and its commitment to the ideal and practices of reconciliation and a proper education for every student.

“Because we believe in the justice and mercy of God in Christ, let us seek His justice in a compassionate way. Let us resolve to glorify his name in the way we enter into dignified discussions when addressing those matters we perceive to be injustices, and seek for solutions. Let us be critical of our own biased perceptions, opening ourselves to the practice of listening to the viewpoints of others and learning from each other, while discerning the will of God in our society together,” Bishop Mabale said.

The forum and council also wrote a special prayer for UFS students, staff, parents, and management:

Our Father in Heaven
•   You have created us all as unique, special people, each with a great destiny.
•   You have an awesome plan for our University, and value every person working and studying here.
•   We have not respected Your heart and opinion of everyone on campus, and so we have sinned against You.
•   Forgive us where we did not follow Your example of reconciliation, restoration, and forgiveness through the blood of Christ, Your Son, on the cross. We need You to show us what You expect of us: grace, mercy, respect, and tolerance for one another from a place of gratefulness and humility.
•   We are grateful for the opportunity and honour You have given us to be involved in this institution.
•   We repent and accept afresh Your commandment to love You and to love our neighbour as we love ourselves.
•   You are saying to us: “For I know the plans I have for you," declares the LORD, "plans to prosper you and not to harm you, plans to give you hope and a future.” We, as an institution, believe and receive this promise You gave to us.

In Jesus Name we pray,
Amen.

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