Genetic relationships among Šumava, Valachian and Improved Valachian sheep

This study compares the genetic variation in three breeds native in the territory of the Czech and Slovak Republics. Six polymorphic microsatellite loci and the loci of beta-lactoglobulin and prolactin are used to detect differences in polymorphism of these markers in Šumava sheep, Valachian sheep a...

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Bibliographic Details
Published in:Small ruminant research 2005, Vol.57 (2), p.157-165
Main Authors: Jandurová, O.M., Kott, T., Kottová, B., Czerneková, V., Milerski, M.
Format: Article
Language:English
Subjects:
alleles
Beta-lactoglobulin
Gene resources
genetic drift
genetic markers
genetic polymorphism
genetic variation
heterozygosity
Improved Valachian (sheep breed)
lactoglobulins
microsatellite repeats
Microsatellites
Prolactin
quantitative trait loci
rare breeds
Sheep
sheep breeds
Sumava (sheep breed)
Valachian (sheep breed)
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Summary:This study compares the genetic variation in three breeds native in the territory of the Czech and Slovak Republics. Six polymorphic microsatellite loci and the loci of beta-lactoglobulin and prolactin are used to detect differences in polymorphism of these markers in Šumava sheep, Valachian sheep and Improved Valachian sheep breeds. The differences among three reproductively isolated sheep populations, in the frequencies of beta-lactoglobulin as well as prolactin alleles, are likely caused by drift in small closed populations. The lower numbers of alleles in MAF33 and MAF209 loci, found in Valachian sheep, are probably due to a dramatic reduction of the population size of this rare breed in the past. Relatively high heterozygosity, in majority of the investigated loci, is a useful tool for maintaining these small populations in the Animal Resources Programme.
ISSN:0921-4488
1879-0941
DOI:10.1016/j.smallrumres.2004.06.021