The dragon lizard Pogona vitticeps has ZZ/ZW micro-sex chromosomes

@article{Ezaz2005TheDL,
  title={The dragon lizard Pogona vitticeps has ZZ/ZW micro-sex chromosomes},
  author={Tariq Ezaz and Alexander Quinn and Ikuo Miura and Stephen D. Sarre and Arthur Georges and Jennifer A Marshall Graves},
  journal={Chromosome Research},
  year={2005},
  volume={13},
  pages={763-776}
}
The bearded dragon, Pogona vitticeps (Agamidae: Reptilia) is an agamid lizard endemic to Australia. Like crocodilians and many turtles, temperature-dependent sex determination (TSD) is common in agamid lizards, although many species have genotypic sex determination (GSD). P. vitticeps is reported to have GSD, but no detectable sex chromosomes. Here we used molecular cytogenetic and differential banding techniques to reveal sex chromosomes in this species. Comparative genomic hybridization (CGH… Expand
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References

SHOWING 1-10 OF 47 REFERENCES
Evolution of sex-chromosomes in lacertid lizards
The occurrence and form of sex chromosomes were investigated with the aid of C-banding and 4′-6-diamidino-2-phenylindole (DAPI) staining in 13 species of lacertid lizards. The results obtained showExpand
Sex Determination in Reptiles
  • J. Bull
  • Biology
  • The Quarterly Review of Biology
  • 1980
TLDR
Temperature-dependent sex determination (TSD) is common in turtles and has been reported in two lizards and alligators; however, data on TSD are available for few non-turtle species and an attempt is made to deduce their ancestries. Expand
Sex-determining mechanisms in squamate reptiles
TLDR
The sex-determining mechanisms of squamate reptiles are poorly known, relative to the large number of species in the group; only 16% of these species have been karyotyped (Olmo, '861), and the effects of multi-temperature incubations have been examined in only a few species. Expand
Homomorphic sex chromosomes in the lacertid lizard Takydromus sexlineatus1
TLDR
A new case of female heterogamety has been described in Takydromus sexlineatus, which suggests that the mechanisms involved in sex chromosomes differentiation in lizards may be the same as those suggested for snakes. Expand
Environmental Sex Determination in Reptiles: Ecology, Evolution, and Experimental Design
TLDR
Physiological investigations of TSD have clarified the roles of steroid hormones, various enzymes, and H-Y antigen in sexual differentiation, whereas molecular studies have identified several plausible candidates for sex-determining genes in species with TSD. Expand
Co‐occurrence of multiple, supposedly incompatible modes of sex determination in a lizard population
TLDR
It is inferred that incubation temperatures can over-ride genetically determined sex in this species, providing a unique opportunity to explore these alternative sex-determining systems within a single population. Expand
Satellite DNA and evolution of sex chromosomes
TLDR
It is suggested that the origin of satellite DNA (satellite III) in the W chromosome is the first step in differentiation of W from the Z in snakes by generating asynchrony in the DNA replication pattern of Z and W chromosomes and thus conceivably reducing the frequency of crossing-over between them which is the prerequisite of differentiation of sex chromosomes. Expand
Sex chromosome differentiation revealed by genomic in-situ hybridization
TLDR
GISH did not reveal any sex chromosome molecular differentiation on the male and female homomorphic sex chromosome pair, and the karyotypes of these individuals were equally labelled by the male- and female-derived probe, while the heteromorphic Y chromosome showed a differentially labelled region only with themale- derived probe. Expand
Evolution of sex-chromosomes and formation of W-chromatin in snakes
TLDR
The analysis of sex-chromosome complexes and formation of W-chromatin in 16 species of snakes of the families Boidae, Colubridae, Elapidae, and Hydrophiidae suggests that the W- chromatin is responsible for the synthesis of the nucleolus in these snakes. Expand
Molecular differentiation of sex chromosomes probed by comparative genomic hybridization
TLDR
Comparative genomic hybridization was used to identify and probe sex chromosomes in several XY and WZ systems and shows that W chromosomes in these species are molecularly well differentiated from the Z chromosomes. Expand
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2
3
4
5
...