Selfish genetic elements promote polyandry in a fly.
Science
; 322(5905): 1241-3, 2008 Nov 21.
Article
en En
| MEDLINE
| ID: mdl-19023079
It is unknown why females mate with multiple males when mating is frequently costly and a single copulation often provides enough sperm to fertilize all a female's eggs. One possibility is that remating increases the fitness of offspring, because fertilization success is biased toward the sperm of high-fitness males. We show that female Drosophila pseudoobscura evolved increased remating rates when exposed to the risk of mating with males carrying a deleterious sex ratio-distorting gene that also reduces sperm competitive ability. Because selfish genetic elements that reduce sperm competitive ability are generally associated with low genetic fitness, they may represent a common driver of the evolution of polyandry.
Texto completo:
1
Colección:
01-internacional
Base de datos:
MEDLINE
Asunto principal:
Conducta Sexual Animal
/
Secuencias Repetitivas de Ácidos Nucleicos
/
Evolución Biológica
Límite:
Animals
Idioma:
En
Revista:
Science
Año:
2008
Tipo del documento:
Article
Pais de publicación:
Estados Unidos