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Genome-wide association study for 13 udder traits from linear type classification in cattle
Udder conformation traits are known to correlate with the incidence of clinical mastitis and the length of productive life. The results of a genome-wide association study based on imputed high-density genotypes of 1,637 -Brown Swiss sires and de-regressed breeding values for 13 udder traits are presented here. For seven traits significant signals could be observed in five regions on BTA3, BTA5, BTA6, BTA17, and BTA25. For fore udder length and teats diameter significant SNPs were found in a known region around 90 Mb on BTA6. For the trait rear udder height significant SNPs are positioned in the coding region of the SNX29 gene. Several significant SNPs around 62 Mb on BTA17 are associated with the traits rear udder width, front teat placement and rear teat placement. The function of potential candidate genes and the influence of substructure will be addressed as next steps.
Keywords:
GWAS
udder conformation traits
