Sarah Mathews is at the Arnold Arboretum, Harvard University, Cambridge, Massachusetts, 02138, USA. smathews@oeb.harvard.edu
Flowering at the appropriate time is critical to ensure that plants complete sexual reproduction before the onset of winter in temperate habitats. A new study provides the first strong evidence that variation at a photoreceptor gene contributes to variation in flowering time and does so in a latitude-dependent manner.
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