Changes to minituber production in Ontario, has the potato industry looking at their options.
Minitubers are the first step in seed potato production. They are grown in greenhouses and then replanted in fields to be multiplied before being sold to commercial potato growers. For years in Ontario, minitubers have been cultivated and grown at the SPUD Unit in New Liskeard, Ont. run by the University of Guelph. However, the facilities have been sold and the future of minituber production is up in the air.
“I think we need to get more people involved in producing minitubers in different creative ways,” Peter VanderZaag, a potato breeder with Sunrise Potato in Alliston, Ont., said during a presentation at the Ontario Potato Conference on March 2, 2023. “The challenge we face now is the SPUD Unit has been sold… and now they want us to rent it for a few years and then say goodbye.”
VanderZaag himself has been involved in minituber production for decades, however not as a producer himself. He has worked as a potato breeder around the world and in 1982 he was the International Potato Center regional director for southeast Asia. He introduced new late blight resistant varieties to Vietnam, however there wasn’t anywhere to buy the seed.
The Vietnam growers decided to take it on themselves to produce the seed they needed. They started their own simple tissue culture labs in their houses and began growing nuclear minitubers. In the decades since they’ve increased production building full greenhouses and are still producing their own potato seed.
“This seems so simple and so amazing — they demystified a sophisticated technology. It’s not only being done in Vietnam now but also in other countries,” VanderZaag explained. “They grow potatoes that are used either for seed or for table. Generally, up to seven generations depending on the variety and disease pressure, you can multiply it again and keep replenishing it providing the farmers with seed.”
Having witnessed it happen firsthand, VanderZaag believes there’s opportunity for southern Ontario potato growers to do this too. The upcoming end to the SPUD Unit isn’t the only reason VanderZaag is pushing for more local minituber production. With diseases such as potato virus Y, common scab and dickeya spp spreading through seed lots, more local seed production could reduce disease incidence and spread in southern Ontario.
“We have enough diversity of climates and places we could do more nuclear seed production in Ontario. Transportation costs, greenhouse gas emissions are all considerations. The cost of shipping seed from Alberta or Maine or wherever you come from to here — there are costs,” he added.
The vision for the future is for a new state of the art SPUD Unit to be built in New Liskeard where research work can be done for potatoes and other fruit and vegetable crops. But on top of that, VanderZaag said they’re looking to have growers start producing minitubers on their own farms. Currently the SPUD Unit only produces 10 per cent of the minitubers needed for seed production in Ontario.
“I’ve already spoken to numerous growers here yesterday and today who have expressed interest. I’m also considering myself to build a greenhouse to do the minituber production from the plants that they could provide,” he said.
The current SPUD Unit lease is up in 2026 and until then there will be a lot of work done to ready the Ontario potato industry for the future of seed production in the province.
Header photo — Contracted minituber production by a private greenhouse grower at New Liskeard, Ont. Photo: Candy Keith
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