Temperature and sperm incorporation in polyploid salamanders.
Science
; 246(4933): 1032-4, 1989 Nov 24.
Article
en En
| MEDLINE
| ID: mdl-2587986
ABSTRACT
Although most animals reproduce sexually, a number of all-female groups exist. Triploid hybrid salamanders appear to maintain themselves by using a male's sperm to activate their eggs, after which the sperm nucleus is eliminated (gynogenesis). The incidence of sperm nuclear incorporation in eggs of these salamanders depends on temperature. Triploid offspring derived gynogenetically are more frequent at lower temperature, whereas tetraploid offspring derived sexually are far more frequent at higher temperatures. Temperature-dependent variability in sperm nuclear incorporation helps explain the variability in reproductive modes reported for hybrid salamanders.
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Colección:
01-internacional
Base de datos:
MEDLINE
Asunto principal:
Poliploidía
/
Espermatozoides
/
Ambystoma
Límite:
Animals
Idioma:
En
Revista:
Science
Año:
1989
Tipo del documento:
Article
País de afiliación:
Canadá