Evolution in response to climate in the native and introduced ranges of a globally distributed plant

Simon Innes, James Santangelo, Nicholas Kooyers, Kenneth Olsen & Marc Johnson
The extent to which species can adapt to spatiotemporal climatic variation in their native and introduced ranges remains unresolved. To address this, we examined how clines in cyanogenesis (HCN production—an antiherbivore defense associated with decreased tolerance to freezing) have shifted in response to climatic variation in space and time over a 60-year period in both the native and introduced ranges of Trifolium repens. HCN production is a polymorphic trait controlled by variation at two Mendelian...
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