Article (Scientific journals)
Linkage disequilibrium on the bovine X chromosome: Characterization and use in quantitative trait locus mapping
Sandor, Cynthia; Farnir, Frédéric; Hansoul, Sarah et al.
2006In Genetics, 173 (3), p. 1777-1786
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Abstract :
[en] We herein demonstrate that in the Holstein-Friesian dairy cattle population, microsatellites are as polymorphic on the X chromosome as on the autosomes but that the level of linkage disequilibrium between these markers is higher on the X chromosome than on the autosomes. The latter observation is not compatible with the small male-to-female ratio that prevails in this population and results in a higher gonosomal than autosomal effective population size. It suggests that the X chromosome undergoes distinct selective or mutational forces. We describe and characterize a novel Markovian approach to exploit this linkage disequilibrium to compute the probability that two chromosomes are identical-by-descent conditional on flanking marker data. We use the ensuing probabilities in a restricted maximum-likelihood approach to search for quantitative trait loci (QTL) affecting 48 traits of importance to the dairy industry and provide evidence for the presence of QTL affecting 5 of these traits on the bovine X chromosome.
Disciplines :
Veterinary medicine & animal health
Author, co-author :
Sandor, Cynthia ;  Université de Liège - ULiège > Département de productions animales > Génomique animale
Farnir, Frédéric  ;  Université de Liège - ULiège > Département de productions animales > Biostatistique, économie, sélection animale
Hansoul, Sarah ;  Université de Liège - ULiège > Département de productions animales > Génomique animale
Coppieters, Wouter ;  Université de Liège - ULiège > Département de productions animales > Département de productions animales
Meuwissen, T.
Georges, Michel  ;  Université de Liège - ULiège > Département de productions animales > Génomique animale
Language :
English
Title :
Linkage disequilibrium on the bovine X chromosome: Characterization and use in quantitative trait locus mapping
Publication date :
2006
Journal title :
Genetics
ISSN :
0016-6731
eISSN :
1943-2631
Publisher :
Genetics, Baltimore, United States - Maryland
Volume :
173
Issue :
3
Pages :
1777-1786
Peer reviewed :
Peer Reviewed verified by ORBi
Available on ORBi :
since 04 January 2010

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