Human Molecular Genetics, Vol 8, 2117-2120, Copyright © 1999 by Oxford University Press
MA Jobling, E Heyer, P Dieltjes and P Knijff
Polymorphic Y-chromosome-specific microsatellites are becoming increasingly
used in evolutionary and forensic studies and, in particular, in dating the
origins of Y-chromosomal lineages. Previously, haplotyping of Y chromosomes
from males belonging to a set of deep-rooting pedigrees was used to
estimate a conservative average Y- chromosomal microsatellite mutation rate
of 2.1 x 10(-3)per locus per generation. A number of males showed multiple
differences in haplotypes compared with other males within their pedigrees,
and these were excluded from the calculation of this estimate, on the
grounds that non- paternity was a more probable explanation than multiple
mutation within a lineage. Here we reanalyse the pedigrees using an
independent highly polymorphic system, the Y-specific minisatellite, MSY1.
This supports the hypothesis of non-paternity where more than one
microsatellite difference was observed, provides further support for the
previously deduced microsatellite mutation rate and throws light on the
mutation dynamics of MSY1 itself, suggesting that single-step changes are
not the only mode of mutation.
ARTICLES
Y-chromosome-specific microsatellite mutation rates re-examined using a minisatellite, MSY1
Department of Genetics, University of Leicester, University Road, Leicester LE1 7RH, UK,
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