Journal
NATURE COMMUNICATIONS
Volume 8, Issue -, Pages -Publisher
NATURE PORTFOLIO
DOI: 10.1038/ncomms14251
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Funding
- European Research Council [260233, 680951]
- Swedish Research Council [2012-3624]
- Natural Sciences and Engineering Research Council of Canada
- Biotechnology and Biological Sciences Research Council [BB/M009513/1]
- Marie Sklodowska-Curie Fellowships [654699, 660172]
- NSF Postdoctoral Research Fellowship in Biology [1523669]
- BBSRC [1622040] Funding Source: UKRI
- NERC [NE/N013948/1] Funding Source: UKRI
- Direct For Biological Sciences
- Div Of Biological Infrastructure [1523669] Funding Source: National Science Foundation
- Marie Curie Actions (MSCA) [660172, 654699] Funding Source: Marie Curie Actions (MSCA)
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Sex chromosomes evolve once recombination is halted between a homologous pair of chromosomes. The dominant model of sex chromosome evolution posits that recombination is suppressed between emerging X and Y chromosomes in order to resolve sexual conflict. Here we test this model using whole genome and transcriptome resequencing data in the guppy, a model for sexual selection with many Y-linked colour traits. We show that although the nascent Y chromosome encompasses nearly half of the linkage group, there has been no perceptible degradation of Y chromosome gene content or activity. Using replicate wild populations with differing levels of sexually antagonistic selection for colour, we also show that sexual selection leads to greater expansion of the non-recombining region and increased Y chromosome divergence. These results provide empirical support for longstanding models of sex chromosome catalysis, and suggest an important role for sexual selection and sexual conflict in genome evolution.
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