Developmental Systems Drift and the Drivers of Sex Chromosome Evolution
Language English Country United States Media print
Document type Journal Article, Research Support, Non-U.S. Gov't, Research Support, U.S. Gov't, Non-P.H.S.
PubMed
31710681
DOI
10.1093/molbev/msz268
PII: 5618730
Knihovny.cz E-resources
- Keywords
- developmental systems drift, recombination suppression, sex chromosomes, sexual antagonism,
- MeSH
- Biological Evolution MeSH
- Phenotype MeSH
- Genetic Drift MeSH
- Evolution, Molecular MeSH
- Pipidae genetics physiology MeSH
- Sex Chromosomes genetics MeSH
- Sex Determination Processes MeSH
- Recombination, Genetic MeSH
- Selection, Genetic MeSH
- Sex Differentiation MeSH
- Animals MeSH
- Check Tag
- Male MeSH
- Female MeSH
- Animals MeSH
- Publication type
- Journal Article MeSH
- Research Support, Non-U.S. Gov't MeSH
- Research Support, U.S. Gov't, Non-P.H.S. MeSH
Phenotypic invariance-the outcome of purifying selection-is a hallmark of biological importance. However, invariant phenotypes might be controlled by diverged genetic systems in different species. Here, we explore how an important and invariant phenotype-the development of sexually differentiated individuals-is controlled in over two dozen species in the frog family Pipidae. We uncovered evidence in different species for 1) an ancestral W chromosome that is not found in many females and is found in some males, 2) independent losses and 3) autosomal segregation of this W chromosome, 4) changes in male versus female heterogamy, and 5) substantial variation among species in recombination suppression on sex chromosomes. We further provide evidence of, and evolutionary context for, the origins of at least seven distinct systems for regulating sex determination among three closely related genera. These systems are distinct in their genomic locations, evolutionary origins, and/or male versus female heterogamy. Our findings demonstrate that the developmental control of sexual differentiation changed via loss, sidelining, and empowerment of a mechanistically influential gene, and offer insights into novel factors that impinge on the diverse evolutionary fates of sex chromosomes.
Biology Department McMaster University Hamilton Canada
Department of Biological Sciences The University of Texas at El Paso El Paso TX
Department of Cell Biology Charles University Prague 2 Czech Republic
Department of Zoology Biodiversity Research Centre University of British Columbia Vancouver Canada
References provided by Crossref.org
