| Autor: |
Matthew C. Brandley, Virginia W. Greene, Robin M. Andrews |
| Rok vydání: |
2013 |
| Předmět: |
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| Zdroj: |
Evolution & Development. 15:326-343 |
| ISSN: |
1520-541X |
| DOI: |
10.1111/ede.12042 |
| Popis: |
SUMMARY Recent studies in comparative vertebrate embryology have focused on two related questions. One concerns the existence of a phylotypic period, or indeed any period, during development in which sequence variation among taxa is constrained. The second question concerns the degree to which developmental characters exhibit a phylogenetic signal. These questions are important because they underpin attempts to understand the evolution of developmental characters and their links to adult morphology. To address these questions, we compared the sequence of developmental events spanning the so-called phylotypic period of vertebrate development in squamate reptiles (lizards and snakes), from the formation of the primary optic placode to the first appearance of scale anlagen. We used Bayesian phylogenetic ancestral state reconstruction analyses and estimates of Bayesian posterior probabilities of the rank order of developmental events to determine the level of support for phylogenetically associated variation in development. We assessed the amount of variation in event sequences by plotting the proportions of reconstructed ranks (excluding unlikely events, PP |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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