Locally adapted traits maintained in the face of high gene flow.
Ecol Lett
; 18(1): 37-47, 2015 Jan.
Article
en En
| MEDLINE
| ID: mdl-25363522
ABSTRACT
Gene flow between phenotypically divergent populations can disrupt local adaptation or, alternatively, may stimulate adaptive evolution by increasing genetic variation. We capitalised on historical Trinidadian guppy transplant experiments to test the phenotypic effects of increased gene flow caused by replicated introductions of adaptively divergent guppies, which were translocated from high- to low-predation environments. We sampled two native populations prior to the onset of gene flow, six historic introduction sites, introduction sources and multiple downstream points in each basin. Extensive gene flow from introductions occurred in all streams, yet adaptive phenotypic divergence across a gradient in predation level was maintained. Descendants of guppies from a high-predation source site showed high phenotypic similarity with native low-predation guppies in as few as ~12 generations after gene flow, likely through a combination of adaptive evolution and phenotypic plasticity. Our results demonstrate that locally adapted phenotypes can be maintained despite extensive gene flow from divergent populations.
Palabras clave
Texto completo:
1
Colección:
01-internacional
Banco de datos:
MEDLINE
Asunto principal:
Fenotipo
/
Poecilia
/
Adaptación Fisiológica
/
Flujo Génico
/
Genética de Población
Límite:
Animals
Idioma:
En
Revista:
Ecol Lett
Año:
2015
Tipo del documento:
Article
País de afiliación:
Estados Unidos