Standing genetic variation as the predominant source for adaptation of a songbird.
Proc Natl Acad Sci U S A
; 116(6): 2152-2157, 2019 02 05.
Article
en En
| MEDLINE
| ID: mdl-30659151
ABSTRACT
What kind of genetic variation contributes the most to adaptation is a fundamental question in evolutionary biology. By resequencing genomes of 80 individuals, we inferred the origin of genomic variants associated with a complex adaptive syndrome involving multiple quantitative traits, namely, adaptation between high and low altitudes, in the vinous-throated parrotbill (Sinosuthora webbiana) in Taiwan. By comparing these variants with those in the Asian mainland population, we revealed standing variation in 24 noncoding genomic regions to be the predominant genetic source of adaptation. Parrotbills at both high and low altitudes exhibited signatures of recent selection, suggesting that not only the front but also the trailing edges of postglacial expanding populations could be subjected to environmental stresses. This study verifies and quantifies the importance of standing variation in adaptation in a cohort of genes, illustrating that the evolutionary potential of a population depends significantly on its preexisting genetic diversity. These findings provide important context for understanding adaptation and conservation of species in the Anthropocene.
Palabras clave
Texto completo:
1
Banco de datos:
MEDLINE
Asunto principal:
Variación Genética
/
Adaptación Biológica
/
Pájaros Cantores
/
Evolución Biológica
Límite:
Animals
País como asunto:
Asia
Idioma:
En
Año:
2019
Tipo del documento:
Article