Parallel reduction in flowering time from de novo mutations enable evolutionary rescue in colonizing lineages - Archive ouverte HAL Access content directly
Journal Articles Nature Communications Year : 2022

Parallel reduction in flowering time from de novo mutations enable evolutionary rescue in colonizing lineages

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Célia Neto
Ahmed Elfarargi
Emmanuel Tergemina
Marcus Koch

Abstract

Abstract Understanding how populations adapt to abrupt environmental change is necessary to predict responses to future challenges, but identifying specific adaptive variants, quantifying their responses to selection and reconstructing their detailed histories is challenging in natural populations. Here, we use Arabidopsis from the Cape Verde Islands as a model to investigate the mechanisms of adaptation after a sudden shift to a more arid climate. We find genome-wide evidence of adaptation after a multivariate change in selection pressures. In particular, time to flowering is reduced in parallel across islands, substantially increasing fitness. This change is mediated by convergent de novo loss of function of two core flowering time genes: FRI on one island and FLC on the other. Evolutionary reconstructions reveal a case where expansion of the new populations coincided with the emergence and proliferation of these variants, consistent with models of rapid adaptation and evolutionary rescue.
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Dates and versions

hal-03748172 , version 1 (09-08-2022)

Licence

Attribution - CC BY 4.0

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Andrea Fulgione, Célia Neto, Ahmed Elfarargi, Emmanuel Tergemina, Shifa Ansari, et al.. Parallel reduction in flowering time from de novo mutations enable evolutionary rescue in colonizing lineages. Nature Communications, 2022, 13 (1), 14 p. ⟨10.1038/s41467-022-28800-z⟩. ⟨hal-03748172⟩
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