Analyzing Developmental Sequences Within a Phylogenetic Framework
| Autor: | Olaf R. P. Bininda-Emonds, Michael K. Richardson, Michael I. Coates, Jonathan E. Jeffery |
|---|---|
| Rok vydání: | 2002 |
| Předmět: |
Mammals
Models Statistical Time Factors Theoretical computer science Phylogenetic tree Event (computing) Absolute time and space Biology Biological Evolution Paleontology Phylogenetics Genetics Animals Frame (artificial intelligence) Pairwise comparison Set (psychology) Heterochrony Phylogeny Ecology Evolution Behavior and Systematics |
| Zdroj: | Systematic Biology. 51:478-491 |
| ISSN: | 1076-836X 1063-5157 |
| DOI: | 10.1080/10635150290069904 |
| Popis: | Heterochronyisimportantasapotentialmechanism ofevolutionarychange.However,the analysis of developmental timing data within a phylogenetic framework to identify important shifts has proven difecult. In particular, analytical problems with sequence (event) heterochrony revolve around the lack of an absolute time frame in development to allow standardization of timing data across species. An important breakthrough in this regard is the method of "event-pairing," which compares the relative timing of developmental events in a pairwise fashion. The resulting event-pair-encoded data can be mapped onto a phylogeny, which can provide important biological information. However, event-paired data are cumbersome to work with and lack a rigorous quan- titative framework under which to analyze them. Critically, the otherwise advantageous relativity of event-pairing prevents an assessment of whether one or both events in a single event-pair have changed position during evolutionaryhistory. Building on the method ofevent-pairing, we describea protocolwherebyevent-pairtransformationsalongagivenbranchareanalyzedenbloc.Ourmethodof "event-pair cracking"thereby allowsdevelopmentaltiming datatobeanalyzed quantitatively within a phylogenetic framework to infer key heterochronic shifts. We demonstrate the utility of event-pair cracking through a worked example and show how it provides a set of desired features identieed by previous authors. (Character mapping; development; event-pairing; evolutionary transformations; heterochrony; phylogenetic framework.) |
| Databáze: | OpenAIRE |
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