The Relative Roles of Selection and Drift in the Chaffinch Radiation (Aves: <i>Fringilla</i>) Across the Atlantic Archipelagos of Macaronesia.

ABSTRACT: Island populations diverge from the mainland and from each other by both natural selection and neutral forces such as founder effects and genetic drift. In this work, we aim to determine the relative roles of selection and drift in the diversification of chaffinches (Fringilla spp.) in Macaronesia. We tested the hypothesis that taxa inhabiting Macaronesian archipelagos, which exhibit significant differences in habitat and climate compared with the mainland, should experience distinct ecological pressures, leading to divergence at loci under selection related to environmental variables. To determine the role of local adaptation in the differentiation of these taxa, we performed genotype-environment association (GEA) analyses using ten environmental variables and 52,306 single nucleot

SUBMITTER: Condori B 

PROVIDER: S-EPMC12000227 | biostudies-literature | 2025 Apr

REPOSITORIES: biostudies-literature