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A genome‐wide association study reveals a QTL influencing caudal supernumerary teats in Holstein cattle
Author(s) -
Joerg H.,
Meili C.,
Ruprecht O.,
Bangerter E.,
Burren A.,
Bigler A.
Publication year - 2014
Publication title -
animal genetics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.756
H-Index - 81
eISSN - 1365-2052
pISSN - 0268-9146
DOI - 10.1111/age.12215
Subject(s) - supernumerary , biology , quantitative trait locus , genetics , heritability , snp , genome wide association study , single nucleotide polymorphism , genetic association , udder , chromosome , anatomy , genotype , gene , mastitis , microbiology and biotechnology
Summary Supernumerary teats represent a common abnormality of the bovine udder. A genome‐wide association study was performed based on the proportion of the occurrence of supernumerary teats in the daughters of 1097 Holstein bulls. The heritability of caudal supernumerary teats without mammary gland in this study was 0.604. The largest proportion of the heritability was attributable to BTA 20. The strongest evidence for association was with five SNP s on chromosome 20, referred to as a QTL . The mode of inheritance at this QTL was dominant. These findings reveal that the occurrence of caudal supernumerary teats without mammary gland in Holstein cattle is influenced by a QTL on chromosome 20 and a polygenic part. The data support the high potential of the SNP s in the QTL region as markers for breeding against caudal supernumerary teats.