Related Experiment Video
Updated: Jul 22, 2026

Transabdominal Ultrasound for Pregnancy Diagnosis in Reeves' Muntjac Deer
Published on: January 7, 2014
A genome-wide association study reveals a QTL influencing caudal supernumerary teats in Holstein cattle
1School of Agricultural, Forest and Food Sciences, Bern University of Applied Sciences, Länggasse 85, 3052, Zollikofen, Switzerland.
Abstract:
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 SNPs 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 SNPs in the QTL region as markers for breeding against caudal supernumerary teats.
More Related Videos
Related Concept Videos
Punnett Squares
Multiple Allele Traits
Pleiotropy
Incomplete Dominance
Genome-wide Association Studies-GWAS
GWAS does not require the identification of the target gene involved in...
Heritability

