Wheat from seed to seed in 8 weeks

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Speed breeding techniques would allow six crops of wheat in a year, intensifying food production.

A speed-breeding platform developed by teams at the John Innes Centre, University of Queensland and University of Sydney, uses a glasshouse or an artificial environment with enhanced lighting to create intense day-long regimes to speed up the search for better performing crops.

Using the technique, the team has achieved wheat generation from seed to seed in just 8 weeks.

Speed breeding, says Dr Wulff, offers a potential new solution to a global challenge for the 21st century.

“People said you may be able to cycle plants fast, but they will look tiny and insignificant, and only set a few seed. In fact, the new technology creates plants that look better and are healthier than those using standard conditions. One colleague could not believe it when he first saw the results.”

The exciting breakthrough has the potential to rank, in terms of impact, alongside the shuttle-breeding techniques introduced after the second world war as part of the green revolution.

Dr Brande Wulff of the John Innes Centre
Dr Brande Wulff of the John Innes Centre

Dr Wulff goes on to say: “I would like to think that in 10 years from now you could walk into a field and point to plants whose attributes and traits were developed using this technology.”

This technique uses fully controlled growth environments and can also be scaled up to work in a standard glass house. It uses LED lights optimised to aid photosynthesis in intensive regimes of up to 22 hours per day.

LED lights significantly reduce the cost compared to sodium vapour lamps which have long been in widespread use but are ineffective because they generate much heat and emit poor quality light.

The international team also prove that the speed breeding technique can be used for a range of important crops. They have achieved up to 6 generations per year for bread wheat, durum wheat, barley, pea, and chickpea; and four generations for canola (a form of rapeseed). This is a significant increase compared with widely used commercial breeding techniques.

Ruth Bryant, Wheat Pathologist at RAGT Seeds Ltd, Essex, UK, said: “Breeders are always looking for ways to speed up the process of getting a variety to market so we are really interested in the concept of speed breeding. We are working closely with Dr Wulff’s group at the John Innes Centre to develop this method in a commercial setting.”

The full paper: Speed breeding is a powerful tool to accelerate crop research and breeding is available at Nature Plants.

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