Climate change alters reproductive isolation and potential gene flow in an annual plant.

摘要: Climate change will likely cause evolution due not only to selection but also changes in reproductive isolation within and among populations. We examined the effects of a natural drought on timing flowering two populations Brassica rapa consequences for predicted potential gene flow. Seeds were collected before after 5-year southern California from varying soil moisture. Lines derived these seeds raised greenhouse under wet conditions. found that caused greater plants than dry site. This differential shift become more phenological similar, which should lead less increased estimated high level assortative mating by time, potentially contributed rapid traits following drought. Estimates higher site population, was reduced study shows climate can alter flow populations, strongly influencing evolution.