Population genetics and ecology of Artemia: Insights into parthenogenetic reproduction.
Trends Ecol Evol
; 7(7): 232-7, 1992 Jul.
Article
em En
| MEDLINE
| ID: mdl-21236016
ABSTRACT
The relative advantages of sexual and parthenogenetic reproduction have long interested biologists and remain a central issue in ecological and evolutionary studies. Recent data on brine shrimp (Artemia) indicate that extensive ecological and genetic divergence occurs in an obligately parthenogenetic lineage. This challenges the belief that parthenogenetic lineages are evolutionary 'dead ends' and that extensive divergence is necessarily linked to recent recruitment from sexual ancestors. The molecular evidence suggests that parthenogenesis in Artemia is relatively ancient, with a single asexual lineage branching from an Old World sexual ancestor approximately five million years ago. Automictic recombination (which can occur in diploid but not polyploid parthenogenetic brine shrimp) appears to play a central role in the long-term maintenance of the parthenogenetic lineage.
Texto completo:
1
Coleções:
01-internacional
Base de dados:
MEDLINE
Idioma:
En
Revista:
Trends Ecol Evol
Ano de publicação:
1992
Tipo de documento:
Article
País de afiliação:
Estados Unidos