Genetic effects and correlations between production and fertility traits and their dependency on the lactation-stage in Holstein Friesians.

ABSTRACT:

Background

This study focused on the dynamics of genome-wide effects on five milk production and eight fertility traits as well as genetic correlations between the traits. For 2,405 Holstein Friesian bulls, estimated breeding values (EBVs) were used. The production traits were additionally assessed in 10-day intervals over the first 60 lactation days, as this stage is physiologically the most crucial time in milk production.

Results

SNPs significantly affecting the EBVs of the production traits could be separated into three groups according to the development of the size of allele effects over time: 1) increasing effects for all traits; 2) decreasing effects for all traits; and 3) increasing effects for all traits except fat yield. Most of the significant markers were found

SUBMITTER: Strucken EM 

PROVIDER: S-EPMC3561121 | biostudies-literature | 2012 Dec

REPOSITORIES: biostudies-literature