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An annual life history is often associated with the ability to self-fertilize. However, it is unknown whether the evolution of selfing commonly precedes the evolution of annuality, orvice versa . Using a 2-year common garden experiment, we asked if the evolution of selfing in the normally perennialArabidopsis lyrata was accompanied by a shift towards the annual habit. Despite their very recent divergence from obligately outcrossing populations, selfing plants exhibited a 39% decrease in over-winter survival after the first year compared with outcrossing plants. Our data ruled out the most obvious underlying mechanism: differences in reproductive investment in the first year did not explain differences in survival. We conclude that transitions to selfing in perennialA. lyrata may be accompanied by a shift towards annuality, but drivers of the process require further investigation.

A shift towards the annual habit in selfing Arabidopsis lyrata