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- W1991998018 abstract "Summary Genetic correlations between body condition score (BCS) and fertility traits in dairy cattle were estimated using bivariate random regression models. BCS was recorded by the Swiss Holstein Association on 22 075 lactating heifers (primiparous cows) from 856 sires. Fertility data during first lactation were extracted for 40 736 cows. The fertility traits were days to first service (DFS), days between first and last insemination (DFLI), calving interval (CI), number of services per conception (NSPC) and conception rate to first insemination (CRFI). A bivariate model was used to estimate genetic correlations between BCS as a longitudinal trait by random regression components, and daughter's fertility at the sire level as a single lactation measurement. Heritability of BCS was 0.17, and heritabilities for fertility traits were low (0.01–0.08). Genetic correlations between BCS and fertility over the lactation varied from: −0.45 to −0.14 for DFS; −0.75 to 0.03 for DFLI; from −0.59 to −0.02 for CI; from −0.47 to 0.33 for NSPC and from 0.08 to 0.82 for CRFI. These results show (genetic) interactions between fat reserves and reproduction along the lactation trajectory of modern dairy cows, which can be useful in genetic selection as well as in management. Maximum genetic gain in fertility from indirect selection on BCS should be based on measurements taken in mid lactation when the genetic variance for BCS is largest, and the genetic correlations between BCS and fertility is strongest." @default.
- W1991998018 created "2016-06-24" @default.
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- W1991998018 date "2007-09-14" @default.
- W1991998018 modified "2023-10-16" @default.
- W1991998018 title "Genetic correlations between body condition scores and fertility in dairy cattle using bivariate random regression models" @default.
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- W1991998018 doi "https://doi.org/10.1111/j.1439-0388.2007.00675.x" @default.
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