昆蟲親緣演化的時間 - 蟲蟲

最新一期的SCIENCE刊載了一篇
Phylogenomics resolves the timing and pattern of insect evolution

http://www.sciencemag.org/content/346/6210/763.full

ABSTRACT
Insects are the most speciose group of animals, but the phylogenetic
relationships of many major lineages remain unresolved. We inferred the
phylogeny of insects from 1478 protein-coding genes. Phylogenomic analyses of
nucleotide and amino acid sequences, with site-specific nucleotide or
domain-specific amino acid substitution models, produced statistically robust
and congruent results resolving previously controversial phylogenetic
relations hips. We dated the origin of insects to the Early Ordovician [~479
million years ago (Ma)], of insect flight to the Early Devonian (~406 Ma), of
major extant lineages to the Mississippian (~345 Ma), and the major
diversification of holometabolous insects to the Early Cretaceous. Our
phylogenomic study provides a comprehensive reliable scaffold for future
comparative analyses of evolutionary innovations among insects.

----
找時間來細讀一下，看看有沒有機會跟大家討論。

--