| Title |
The dragon lizard Pogona vitticeps has ZZ/ZW micro-sex chromosomes
|
|---|---|
| Published in |
Chromosome Research, December 2005
|
| DOI | 10.1007/s10577-005-1010-9 |
| Pubmed ID | |
| Authors |
Tariq Ezaz, Alexander E. Quinn, Ikuo Miura, Stephen D. Sarre, Arthur Georges, Jennifer A. Marshall Graves |
| Abstract |
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), GTG- and C-banding identified a highly heterochromatic microchromosome specific to females, demonstrating female heterogamety (ZZ/ZW) in this species. We isolated the P. vitticeps W chromosome by microdissection, re-amplified the DNA and used it to paint the W. No unpaired bivalents were detected in male synaptonemal complexes at meiotic pachytene, confirming male homogamety. We conclude that P. vitticeps has differentiated previously unidentifable W and Z micro-sex chromosomes, the first to be demonstrated in an agamid lizard. Our finding implies that heterochromatinization of the heterogametic chromosome occurred during sex chromosome differentiation in this species, as is the case in some lizards and many snakes, as well as in birds and mammals. Many GSD reptiles with cryptic sex chromosomes may also prove to have micro-sex chromosomes. Reptile microchromosomes, long dismissed as non-functional minutiae and often omitted from karyotypes, therefore deserve closer scrutiny with new and more sensitive techniques. |
X Demographics
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Geographical breakdown
| Country | Count | As % |
|---|---|---|
| Canada | 1 | 50% |
| United Kingdom | 1 | 50% |
Demographic breakdown
| Type | Count | As % |
|---|---|---|
| Scientists | 1 | 50% |
| Members of the public | 1 | 50% |
Mendeley readers
The data shown below were compiled from readership statistics for 166 Mendeley readers of this research output. Click here to see the associated Mendeley record.
Geographical breakdown
| Country | Count | As % |
|---|---|---|
| Portugal | 2 | 1% |
| Hungary | 1 | <1% |
| Germany | 1 | <1% |
| Netherlands | 1 | <1% |
| France | 1 | <1% |
| Brazil | 1 | <1% |
| Czechia | 1 | <1% |
| Spain | 1 | <1% |
| Japan | 1 | <1% |
| Other | 0 | 0% |
| Unknown | 156 | 94% |
Demographic breakdown
| Readers by professional status | Count | As % |
|---|---|---|
| Researcher | 40 | 24% |
| Student > Ph. D. Student | 31 | 19% |
| Student > Master | 22 | 13% |
| Student > Bachelor | 19 | 11% |
| Student > Doctoral Student | 8 | 5% |
| Other | 25 | 15% |
| Unknown | 21 | 13% |
| Readers by discipline | Count | As % |
|---|---|---|
| Agricultural and Biological Sciences | 88 | 53% |
| Biochemistry, Genetics and Molecular Biology | 29 | 17% |
| Environmental Science | 13 | 8% |
| Veterinary Science and Veterinary Medicine | 2 | 1% |
| Earth and Planetary Sciences | 2 | 1% |
| Other | 12 | 7% |
| Unknown | 20 | 12% |
Attention Score in Context
This research output has an Altmetric Attention Score of 5. This is our high-level measure of the quality and quantity of online attention that it has received. This Attention Score, as well as the ranking and number of research outputs shown below, was calculated when the research output was last mentioned on 18 February 2024.
All research outputs
#7,310,239
of 25,998,826 outputs
Outputs from Chromosome Research
#139
of 549 outputs
Outputs of similar age
#35,762
of 167,145 outputs
Outputs of similar age from Chromosome Research
#1
of 3 outputs
Altmetric has tracked 25,998,826 research outputs across all sources so far. This one has received more attention than most of these and is in the 71st percentile.
So far Altmetric has tracked 549 research outputs from this source. They typically receive a little more attention than average, with a mean Attention Score of 6.2. This one has gotten more attention than average, scoring higher than 74% of its peers.
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