All iguana families with the exception of basilisks share sex chromosomes
Language English Country Germany Media print-electronic
Document type Journal Article, Research Support, Non-U.S. Gov't
PubMed
29287619
DOI
10.1016/j.zool.2017.11.007
PII: S0944-2006(17)30189-7
Knihovny.cz E-resources
- Keywords
- Dedifferentiation, Evolution, Sex chromosomes, X-linked genes, qPCR,
- MeSH
- X Chromosome genetics MeSH
- Phylogeny MeSH
- Gene Dosage genetics MeSH
- Karyotype MeSH
- Real-Time Polymerase Chain Reaction veterinary MeSH
- Iguanas genetics MeSH
- Sex Chromosomes genetics MeSH
- Animals MeSH
- Check Tag
- Male MeSH
- Female MeSH
- Animals MeSH
- Publication type
- Journal Article MeSH
- Research Support, Non-U.S. Gov't MeSH
Once believed to be restricted only to endotherms (mammals and birds), several poikilothermic amniote lineages have recently been documented to possess long-term evolutionary stability in their sex chromosomes. However, many important lineages were not included in these tests. Previously, based on molecular evidence, we documented the homology of well-differentiated sex chromosomes among seven families of iguanas (Pleurodonta), with basilisks (Corytophanidae) being the only exception, as the tested genes linked to X, but missing on the Y chromosome, in other iguanas were autosomal or pseudoautosomal in basilisks. In this study, we test the homology of sex chromosomes in the remaining, previously unstudied iguana families (Hoplocercidae, Leiosauridae, Liolaemidae, Polychrotidae) and in the basilisk genus Corytophanes. Our results show that 12 currently recognized families of iguanas share X-specific gene content conserved from the common ancestor living in the Cretaceous period. However, the results in the genus Corytophanes indicate the loss of the ancestral differentiated sex chromosomes from the ancestor of basilisks. Our new data further confirm the extensive stability of sex chromosomes in iguanas, thus enabling molecular sexing based on the comparison of the number of X-specific genes by quantitative PCR (qPCR) in all but one family of this widely diversified clade.
Department of Ecology Faculty of Science Charles University CZ 12844 Prague Czech Republic
Department of Zoology Faculty of Science Palacky University CZ 77146 Olomouc Czech Republic
References provided by Crossref.org
Sex Chromosome Turnovers and Stability in Snakes
Sex chromosome evolution among amniotes: is the origin of sex chromosomes non-random?
Poorly differentiated XX/XY sex chromosomes are widely shared across skink radiation
Evolutionary Variability of W-Linked Repetitive Content in Lacertid Lizards
Conserved sex chromosomes and karyotype evolution in monitor lizards (Varanidae)
