Wright, AE;
Harrison, PW;
Zimmer, F;
Montgomery, SH;
Pointer, MA;
Mank, JE;
(2015)
Variation in promiscuity and sexual selection drives avian rate of Faster-Z evolution.
Mol Ecol
, 24
(6)
pp. 1218-1235.
10.1111/mec.13113.
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Abstract
Higher rates of coding sequence evolution have been observed on the Z chromosome relative to the autosomes across a wide range of species. However, despite a considerable body of theory, we lack empirical evidence explaining variation in the strength of the Faster-Z Effect. To assess the magnitude and drivers of Faster-Z Evolution, we assembled six de novo transcriptomes, spanning 90 million years of avian evolution. Our analysis combines expression, sequence and polymorphism data with measures of sperm competition and promiscuity. In doing so, we present the first empirical evidence demonstrating the positive relationship between Faster-Z Effect and measures of promiscuity, and therefore variance in male mating success. Our results from multiple lines of evidence indicate that selection is less effective on the Z chromosome, particularly in promiscuous species, and that Faster-Z Evolution in birds is due primarily to genetic drift. Our results reveal the power of mating system and sexual selection in shaping broad patterns in genome evolution. This article is protected by copyright. All rights reserved.
| Type: | Article |
|---|---|
| Title: | Variation in promiscuity and sexual selection drives avian rate of Faster-Z evolution. |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1111/mec.13113 |
| Publisher version: | http://dx.doi.org/10.1111/mec.13113 |
| Additional information: | © 2015 The Authors. Molecular Ecology published by John Wiley & Sons Ltd. This is an open access article under the terms of the Creative Commons Attribution License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited. |
| Keywords: | Faster-Z evolution, effective population size, genetic drift, sexual selection |
| UCL classification: | UCL UCL > Provost and Vice Provost Offices > School of Life and Medical Sciences UCL > Provost and Vice Provost Offices > School of Life and Medical Sciences > Faculty of Life Sciences UCL > Provost and Vice Provost Offices > School of Life and Medical Sciences > Faculty of Life Sciences > Div of Biosciences UCL > Provost and Vice Provost Offices > School of Life and Medical Sciences > Faculty of Life Sciences > Div of Biosciences > Genetics, Evolution and Environment |
| URI: | https://discovery.ucl.ac.uk/id/eprint/1462440 |
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