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Is Speciation Accompanied by Rapid Evolution? Insights from Comparing Reproductive and Nonreproductive Transcriptomes in Drosophila
Joint Authors
Jagadeeshan, Santosh
Haerty, Wilfried
Singh, Rama S.
Source
International Journal of Evolutionary Biology
Issue
Vol. 2011, Issue 2011 (31 Dec. 2011), pp.1-11, 11 p.
Publisher
Hindawi Publishing Corporation
Publication Date
2011-08-22
Country of Publication
Egypt
No. of Pages
11
Main Subjects
Abstract EN
The tempo and mode of evolutionary change during speciation have remained contentious until recently.
While much of the evidence claiming speciation is an abrupt and rapid process comes from fossil data, recent molecular phylogenetics show that the background of gradual evolution is often broken by accelerated rates of molecular evolution during speciation.
However, what kinds of genes affect or are affected by speciation remains unexplored.
Our analysis of 4843 protein-coding genes in five species of the Drosophila melanogaster subgroup shows that while ~70% of genes follow clock-like evolution, between 17–19.67% of loci show signatures of accelerated rates of evolution in recently formed species.
These genes show 2-3-fold higher rates of substitution in recently diverged species compared to older species.
This fraction of loci affects a diverse range of functions.
Only a small proportion of reproductive genes experience speciation-related accelerated changes but many sex-and -reproduction related genes show an interesting pattern of persistent rapid evolution suggesting that sex-and-reproduction related genes are under constant selective pressures.
The identification of loci associated with accelerated evolution allows us to address the mechanisms of rapid evolution and speciation, which in our study appears to be a combination of both selection and rapid demographical changes.
American Psychological Association (APA)
Jagadeeshan, Santosh& Haerty, Wilfried& Singh, Rama S.. 2011. Is Speciation Accompanied by Rapid Evolution? Insights from Comparing Reproductive and Nonreproductive Transcriptomes in Drosophila. International Journal of Evolutionary Biology،Vol. 2011, no. 2011, pp.1-11.
https://search.emarefa.net/detail/BIM-483689
Modern Language Association (MLA)
Jagadeeshan, Santosh…[et al.]. Is Speciation Accompanied by Rapid Evolution? Insights from Comparing Reproductive and Nonreproductive Transcriptomes in Drosophila. International Journal of Evolutionary Biology No. 2011 (2011), pp.1-11.
https://search.emarefa.net/detail/BIM-483689
American Medical Association (AMA)
Jagadeeshan, Santosh& Haerty, Wilfried& Singh, Rama S.. Is Speciation Accompanied by Rapid Evolution? Insights from Comparing Reproductive and Nonreproductive Transcriptomes in Drosophila. International Journal of Evolutionary Biology. 2011. Vol. 2011, no. 2011, pp.1-11.
https://search.emarefa.net/detail/BIM-483689
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references
Record ID
BIM-483689