A large pseudoautosomal region on the sex chromosomes of the frog Silurana tropicalis.
A large pseudoautosomal region on the sex chromosomes of the frog Silurana tropicalis.
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DOI:
10.1093/gbe/evt073
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发表时间:
2013
影响因子:
3.3
通讯作者:
Evans BJ
中科院分区:
文献类型:
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作者:
Bewick AJ;Chain FJ;Zimmerman LB;Sesay A;Gilchrist MJ;Owens ND;Seifertova E;Krylov V;Macha J;Tlapakova T;Kubickova S;Cernohorska H;Zarsky V;Evans BJ
Sex chromosome divergence has been documented across phylogenetically diverse species, with amphibians typically having cytologically nondiverged (“homomorphic”) sex chromosomes. With an aim of further characterizing sex chromosome divergence of an amphibian, we used “RAD-tags” and Sanger sequencing to examine sex specificity and heterozygosity in the Western clawed frog Silurana tropicalis (also known as Xenopus tropicalis). Our findings based on approximately 20 million genotype calls and approximately 200 polymerase chain reaction-amplified regions across multiple male and female genomes failed to identify a substantially sized genomic region with genotypic hallmarks of sex chromosome divergence, including in regions known to be tightly linked to the sex-determining region. We also found that expression and molecular evolution of genes linked to the sex-determining region did not differ substantially from genes in other parts of the genome. This suggests that the pseudoautosomal region, where recombination occurs, comprises a large portion of the sex chromosomes of S. tropicalis. These results may in part explain why African clawed frogs have such a high incidence of polyploidization, shed light on why amphibians have a high rate of sex chromosome turnover, and raise questions about why homomorphic sex chromosomes are so prevalent in amphibians.
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影响因子:
3.7
作者:
Baird NA;Etter PD;Atwood TS;Currey MC;Shiver AL;Lewis ZA;Selker EU;Cresko WA;Johnson EA
通讯作者:
Johnson EA
影响因子:
3.7
作者:
Baxter SW;Davey JW;Johnston JS;Shelton AM;Heckel DG;Jiggins CD;Blaxter ML
通讯作者:
Blaxter ML
DOI:
10.1098/rstb.2000.0717
发表时间:
2000-11-29
影响因子:
6.3
作者:
Charlesworth, B;Charlesworth, D
通讯作者:
Charlesworth, D
DOI:
10.1073/pnas.95.14.8147
发表时间:
1998-07-07
影响因子:
11.1
作者:
Fridolfsson, AK;Cheng, H;Ellegren, H
通讯作者:
Ellegren, H
影响因子:
30.8
作者:
通讯作者:
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