Phylogenomics resolves the timing and pattern of insect evolution.
نویسندگان
چکیده
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.
منابع مشابه
INSECT PHYLOGENOMICS. Comment on "Phylogenomics resolves the timing and pattern of insect evolution".
Misof et al. (Reports, 7 November 2014, p. 763) used a genome-scale data set to estimate the relationships among insect orders and the time scale of their evolution. Here, we reanalyze their data and show that their method has led to systematic underestimation of the evolutionary time scale. We find that key insect groups evolved up to 100 million years earlier than inferred in their study.
متن کاملINSECT PHYLOGENOMICS. Response to Comment on "Phylogenomics resolves the timing and pattern of insect evolution".
Tong et al. comment on the accuracy of the dating analysis presented in our work on the phylogeny of insects and provide a reanalysis of our data. They replace log-normal priors with uniform priors and add a "roachoid" fossil as a calibration point. Although the reanalysis provides an interesting alternative viewpoint, we maintain that our choices were appropriate.
متن کاملComment on “Phylogenomics resolves the timing and pattern of insect evolution”
I nsects are the most diverse group of animals on Earth, occupying a broad range of niches across ecosystems. However, many insect groups have a poor fossil record, meaning that the early evolution of hexapod orders remains shrouded in mystery (1). For this reason, studies of insect diversification, the timing of evolutionary innovations, and the arthropod phylogeny rely on molecular date estim...
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The evolution of the diverse insect lineages is one of the most fascinating issues in evolutionary biology. Despite extensive research in this area, the resolution of insect phylogeny especially of interordinal relationships has turned out to be still a great challenge. One of the challenges for insect systematics is the radiation of the polyneopteran lineages with several contradictory and/or ...
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عنوان ژورنال:
- Science
دوره 346 6210 شماره
صفحات -
تاریخ انتشار 2014