Community-wide genome sequencing reveals 30 years of Darwin's finch evolution.
Science
; 381(6665): eadf6218, 2023 09 29.
Article
em En
| MEDLINE
| ID: mdl-37769091
ABSTRACT
A fundamental goal in evolutionary biology is to understand the genetic architecture of adaptive traits. Using whole-genome data of 3955 of Darwin's finches on the Galápagos Island of Daphne Major, we identified six loci of large effect that explain 45% of the variation in the highly heritable beak size of Geospiza fortis, a key ecological trait. The major locus is a supergene comprising four genes. Abrupt changes in allele frequencies at the loci accompanied a strong change in beak size caused by natural selection during a drought. A gradual change in Geospiza scandens occurred across 30 years as a result of introgressive hybridization with G. fortis. This study shows how a few loci with large effect on a fitness-related trait contribute to the genetic potential for rapid adaptive radiation.
Texto completo:
1
Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Seleção Genética
/
Bico
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Adaptação Biológica
/
Tentilhões
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Especiação Genética
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Introgressão Genética
Limite:
Animals
País/Região como assunto:
America do sul
/
Ecuador
Idioma:
En
Ano de publicação:
2023
Tipo de documento:
Article