Variability of canine microsatellites within and between different dog breeds

Variability of canine microsatellites within and between different dog breeds Polymorphic animal microsatellites have proved valuable genetic markers. For this project, the variability of 19 canine microsatellite loci was examined within and between three pure breeds of dog: Greyhounds, Labradors, and German Shepherds. The number of alleles, absolute and relative frequencies, and the statistics that express polymorphism within a breed were determined. The evolutionary relationships among these closely related dog breeds were estimated by genetic distance measures developed for use with microsatellite loci. According to the pairwise genetic distances, Greyhounds and German Shepherds had longer diverse evolutionary histories than Greyhounds and Labradors or Labradors and German Shepherds. Although a few breed-specific alleles were observed, the significant differences between breeds are in their relative frequencies and distribution of the alleles across a locus. None of the three pure dog breeds corresponds to Hardy-Weinberg equilibrium. A considerable reduction in intrapopulation variation was observed within three pure breeds, compared with the population of individuals belonging to 15 dog breeds. This reduction was especially pronounced in the Greyhound breed, which expressed the lowest degree of variation. Intrapopulation variations of Labradors and German Shepherds did not differ significantly, that of Labradors being only slightly higher. The intra-species variation of dogs is lower than in humans, mouse, or rat, but similar to that in domestic animals, probably reflecting similarly high inbreeding coefficients. However, some highly informative loci were common to all dog breeds tested so far. Such population data are necessary for mapping studies and linkage analysis in dogs. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Mammalian Genome Springer Journals

Variability of canine microsatellites within and between different dog breeds

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Publisher
Springer-Verlag
Copyright
Copyright © 1997 by Springer-Verlag
Subject
Life Sciences; Cell Biology; Anatomy; Zoology
ISSN
0938-8990
eISSN
1432-1777
D.O.I.
10.1007/s003359900386
Publisher site
See Article on Publisher Site

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