Demonstration of a heritable component of the variation in segment number in the centipede Strigamia maritima.
Evol Dev
; 11(4): 434-40, 2009.
Article
en En
| MEDLINE
| ID: mdl-19601976
Here we address the question of how arthropod segment number may evolve by reporting the results of further work on the model system Strigamia maritima. Recently, we showed that there was a plastic component of the variation in segment number within this species; now we demonstrate that there is also a heritable component. This is important because it enables a connection to be made between the known latitudinal trend among species of geophilomorph centipedes (more segments at lower latitudes) and the parallel trend within them. This latter trend is best documented in S. maritima but is also known in several other species. However, while a general connection between the inter- and intraspecific trends can now be made, deciding upon a specific hypothesis of the nature of the selection involved is still problematic. We provide two alternative hypotheses, one based on the temperature-related plasticity in segment number being adaptive, the other based on it being nonadaptive.
Texto completo:
1
Colección:
01-internacional
Base de datos:
MEDLINE
Asunto principal:
Artrópodos
Límite:
Animals
Idioma:
En
Revista:
Evol Dev
Asunto de la revista:
BIOLOGIA
Año:
2009
Tipo del documento:
Article
País de afiliación:
Irlanda
Pais de publicación:
Estados Unidos