New Zealand explores advanced potato breeding techniques for sustainable cultivation

Herridge outlined the traditional breeding process, which involves crossing varieties and conducting field trials to identify superior offspring. He also discussed the role of traditional transgenics, such as the US-developed Innate potato, and gene editing technologies such as CRISPR, which allow precise editing of DNA. However, the focus was on new breeding techniques, which use temporary genetic modifications to speed up the breeding process. These produce “null segments” with improved genetics but no transgenes.

During the webinar, the concept of F1 hybrid breeding for potatoes was introduced, a method that could provide both hybrid vigour and genetic uniformity. This is made possible by the “ChOW” technology, developed at the University of Otago. This technology facilitates both inbreeding and outcrossing and produces F1 hybrid seeds without transgenes.

For New Zealand growers, these advances could lead to improved disease resistance and genetic gain, helping to address issues such as scab. Despite potential challenges, collaboration between Otago University, international companies and ongoing research promises a shift toward more sustainable and efficient potato production in New Zealand.

The session concluded with a question and answer session in which Herridge discussed the availability of diploid potato varieties and the steps towards implementing these new techniques in the New Zealand potato industry.