Complex evolutionary trajectories of sex chromosomes across bird taxa
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Complex evolutionary trajectories of sex chromosomes across bird taxa. / Zhou, Qi; Zhang, Jilin; Bachtrog, Doris; An, Na; Huang, Quanfei; Jarvis, Erich D.; Gilbert, M. Thomas P.; Zhang, Guojie.
In: Science, Vol. 346, No. 6215, 1246338, 2014.Research output: Contribution to journal › Journal article › Research › peer-review
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TY - JOUR
T1 - Complex evolutionary trajectories of sex chromosomes across bird taxa
AU - Zhou, Qi
AU - Zhang, Jilin
AU - Bachtrog, Doris
AU - An, Na
AU - Huang, Quanfei
AU - Jarvis, Erich D.
AU - Gilbert, M. Thomas P.
AU - Zhang, Guojie
PY - 2014
Y1 - 2014
N2 - Sex-specific chromosomes, like the W of most female birds and the Y of male mammals, usually have lost most genes owing to a lack of recombination.We analyze newly available genomes of 17 bird species representing the avian phylogenetic range, and find that more than half of them do not have as fully degenerated W chromosomes as that of chicken. We show that avian sex chromosomes harbor tremendous diversity among species in their composition of pseudoautosomal regions and degree of Z/W differentiation. Punctuated events of shared or lineage-specific recombination suppression have produced a gradient of "evolutionary strata" along the Z chromosome, which initiates from the putative avian sex-determining gene DMRT1 and ends at the pseudoautosomal region.W-linked genes are subject to ongoing functional decay after recombination was suppressed, and the tempo of degeneration slows down in older strata. Overall, we unveil a complex history of avian sex chromosome evolution.
AB - Sex-specific chromosomes, like the W of most female birds and the Y of male mammals, usually have lost most genes owing to a lack of recombination.We analyze newly available genomes of 17 bird species representing the avian phylogenetic range, and find that more than half of them do not have as fully degenerated W chromosomes as that of chicken. We show that avian sex chromosomes harbor tremendous diversity among species in their composition of pseudoautosomal regions and degree of Z/W differentiation. Punctuated events of shared or lineage-specific recombination suppression have produced a gradient of "evolutionary strata" along the Z chromosome, which initiates from the putative avian sex-determining gene DMRT1 and ends at the pseudoautosomal region.W-linked genes are subject to ongoing functional decay after recombination was suppressed, and the tempo of degeneration slows down in older strata. Overall, we unveil a complex history of avian sex chromosome evolution.
U2 - 10.1126/science.1246338
DO - 10.1126/science.1246338
M3 - Journal article
AN - SCOPUS:84917708480
VL - 346
JO - Science
JF - Science
SN - 0036-8075
IS - 6215
M1 - 1246338
ER -
ID: 129542408