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

Andrea Fulgione, Célia Neto, Ahmed F. Elfarargi, Emmanuel Tergemina, Shifa Ansari, Mehmet Göktay, Herculano Dinis, Nina Döring, Pádraic J. Flood, Sofia Rodriguez-Pacheco, Nora Walden, Marcus A. Koch, Fabrice Roux, Joachim Hermisson and Angela M. Hancock ()
Additional contact information
Andrea Fulgione: Max Planck Institute for Plant Breeding Research
Célia Neto: Max Planck Institute for Plant Breeding Research
Ahmed F. Elfarargi: Max Planck Institute for Plant Breeding Research
Emmanuel Tergemina: Max Planck Institute for Plant Breeding Research
Shifa Ansari: Max Planck Institute for Plant Breeding Research
Mehmet Göktay: Max Planck Institute for Plant Breeding Research
Herculano Dinis: Parque Natural do Fogo, Direção Nacional do Ambiente
Nina Döring: Max Planck Institute for Plant Breeding Research
Pádraic J. Flood: Max Planck Institute for Plant Breeding Research
Sofia Rodriguez-Pacheco: Max Planck Institute for Plant Breeding Research
Nora Walden: Centre for Organismal Studies (COS) Heidelberg, Biodiversity and Plant Systematics, Heidelberg University
Marcus A. Koch: Centre for Organismal Studies (COS) Heidelberg, Biodiversity and Plant Systematics, Heidelberg University
Fabrice Roux: LIPME, Université de Toulouse, INRAE, CNRS
Joachim Hermisson: University of Vienna
Angela M. Hancock: Max Planck Institute for Plant Breeding Research

Nature Communications, 2022, vol. 13, issue 1, 1-14

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.

Date: 2022
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DOI: 10.1038/s41467-022-28800-z

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