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Nat Genet. 2015 May;47(5):453-7. doi: 10.1038/ng.3171. Epub 2015 Mar 25.

The Y-chromosome point mutation rate in humans.

Author information

1
1] deCODE Genetics/Amgen, Inc., Reykjavik, Iceland. [2] Department of Anthropology, University of Iceland, Reykjavik, Iceland.
2
deCODE Genetics/Amgen, Inc., Reykjavik, Iceland.
3
1] deCODE Genetics/Amgen, Inc., Reykjavik, Iceland. [2] Faculty of Medicine, University of Iceland, Reykjavik, Iceland.

Abstract

Mutations are the fundamental source of biological variation, and their rate is a crucial parameter for evolutionary and medical studies. Here we used whole-genome sequence data from 753 Icelandic males, grouped into 274 patrilines, to estimate the point mutation rate for 21.3 Mb of male-specific Y chromosome (MSY) sequence, on the basis of 1,365 meioses (47,123 years). The combined mutation rate for 15.2 Mb of X-degenerate (XDG), X-transposed (XTR) and ampliconic excluding palindromes (rAMP) sequence was 8.71 × 10(-10) mutations per position per year (PPPY). We observed a lower rate (P = 0.04) of 7.37 × 10(-10) PPPY for 6.1 Mb of sequence from palindromes (PAL), which was not statistically different from the rate of 7.2 × 10(-10) PPPY for paternally transmitted autosomes. We postulate that the difference between PAL and the other MSY regions may provide an indication of the rate at which nascent autosomal and PAL de novo mutations are repaired as a result of gene conversion.

PMID:
25807285
DOI:
10.1038/ng.3171
[Indexed for MEDLINE]

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