The John Innes Centre researchers have discovered that the Ppd-H1 gene in barley controls the timing of the activity of another gene called CO. When the length of the day is long enough CO activates one of the key genes that triggers flowering. Naturally occurring variation in Ppd-H1 affects the time of day when CO is activated. This shifts the time of year that the plant flowers.
Dr David Laurie, the research leader at the John Innes Centre, said, "Growing crops will become more difficult as the global climate changes. The varieties of crops grown in the UK are suited to the soil, seasons and traditional cool, wet summers. Later flowering in barley means it has a longer growing period to amass yield. If British summers get hotter and drier we will need types of wheat, barley and other crops that flower earlier, like Mediterranean varieties, to beat summer droughts. However, new varieties will need to be adapted in all other ways to UK conditions. "
With the new knowledge about the workings of barley researchers and plant breeders will find it easier to select variations that will thrive in the UK environment but will also flower earlier, coping with hotter summers.
Dr Laurie commented, "Although our research has been on barley we know from observation that other crops show similar variation in the way they respond to the lengthening of the day in springtime. We are confident that we will find equivalent genes in other key crops."
Professor Julia Goodfellow, BBSRC Chief Executive, said, "Climate change presents a huge challenge for the world. Although every effort must be concentrated on reducing the impact of human activity on the environment, science should also be answering questions about how we can live in an altered climate. Research such as this helps to present answers to some of these problems."