Assessing the phylogenetic utility of sequence heterochrony: evolution of avian ossification sequences as a case study.
Zoology (Jena)
; 113(1): 57-66, 2010 Jan.
Article
en En
| MEDLINE
| ID: mdl-20116981
ABSTRACT
The evolution of developmental sequences, or sequence heterochrony, is an emerging field of study that addresses the temporal interplay between evolution and development. Some phylogenetic signal has been found in developmental sequence data, but sampling has generally been limited to small numbers of taxa and few developmental events. Here we present the largest ossification sequence dataset to date. The sequences are composed of ossification events throughout the avian skeleton, and are used to address the evolutionary signal of ossification sequence data within this clade. The results indicate that ossification sequences are conserved in birds, and show a stronger phylogenetic signal than previous studies, perhaps due to the volume of data. Phylogenetic signal is not strong enough, however, to consider ossification sequence data to be any better at resolving phylogenetic hypotheses than other morphological data and just as prone to evolutionary convergence. There is no one-to-one correlation between ossification sequence and developmental stage. We discuss some methodological implications of our findings, as well as commonalities in avian ossification sequences such as early ossification of the long bones relative to the dermatocranium, and of the hindlimb over the forelimb.
Texto completo:
1
Colección:
01-internacional
Base de datos:
MEDLINE
Asunto principal:
Osteogénesis
/
Filogenia
/
Aves
/
Huesos
/
Evolución Biológica
Tipo de estudio:
Prognostic_studies
Límite:
Animals
Idioma:
En
Revista:
Zoology (Jena)
Asunto de la revista:
BIOLOGIA
Año:
2010
Tipo del documento:
Article