Please use this identifier to cite or link to this item: http://hdl.handle.net/2381/15429
Title: Estimating sex-specific processes in human populations: Are XY-homologous markers an effective tool?
Authors: Balaresque, P
Manni, F
Dugoujon, JM
Crousau-Roy, B
Heyer, E
First Published: Mar-2006
Citation: HEREDITY (EDINB), 2006, 96 (3), pp. 214-221
Abstract: Homologous markers on the sex-specific regions of the X- and Y-chromosomes are differentially inherited through males and females, and have similar molecular characteristics. They may therefore be useful as a complement to the comparison of mtDNA and Y-chromosomal haplotypes for estimating sex-specific processes shaping human population structure. To test this idea, we analyzed XY-homologous microsatellite diversity in 33 human populations from Africa, Asia and Europe. Interpopulation comparisons suggest that the generally discordant pattern of genetic variation observed for X- and Y-linked markers could be an outcome of sex-specific migration processes (m(females)/m(males) approximately 3) or sex-specific demographic processes (N(females)/N(males) approximately 11) or a combination of both. However, intrapopulation diversity estimated by the X/Y ratio Watterson estimator (theta(H(Y))/theta(H(X))) suggests that the scenarios required to explain the global genetic variation of XY-homologous markers are many and complex, and that the sex-specific processes (effective population size and migration rate) shaping human population structures are likely to be specific to each population under study. XY-homologous markers provide an insight into the genuine complexity of sex-specific processes, and their further exploitation in human population studies seems worthwhile.
DOI Link: 10.1038/sj.hdy.6800779
ISSN: 0018-067X
Links: http://hdl.handle.net/2381/15429
Type: Journal Article
Appears in Collections:Published Articles, Dept. of Genetics

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