PMID- 17868080
OWN - NLM
STAT- MEDLINE
DCOM- 20071213
LR  - 20070917
IS  - 0931-2668 (Print)
IS  - 0931-2668 (Linking)
VI  - 124
IP  - 5
DP  - 2007 Oct
TI  - Genetic correlations between body condition scores and fertility in dairy cattle 
      using bivariate random regression models.
PG  - 277-85
AB  - 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.
FAU - De Haas, Y
AU  - De Haas Y
AD  - Institute of Animal Sciences, Swiss Federal Institute of Technology ETH Zentrum, 
      Zurich, Switzerland.
FAU - Janss, L L G
AU  - Janss LL
FAU - Kadarmideen, H N
AU  - Kadarmideen HN
LA  - eng
PT  - Journal Article
PT  - Research Support, Non-U.S. Gov't
PL  - Germany
TA  - J Anim Breed Genet
JT  - Journal of animal breeding and genetics = Zeitschrift fur Tierzuchtung und 
      Zuchtungsbiologie
JID - 100955807
SB  - IM
MH  - Animals
MH  - Body Composition/*genetics
MH  - Cattle/*genetics
MH  - Female
MH  - Fertility/*genetics
MH  - Insemination
MH  - Male
MH  - Models, Genetic
MH  - Regression Analysis
EDAT- 2007/09/18 09:00
MHDA- 2007/12/14 09:00
CRDT- 2007/09/18 09:00
PHST- 2007/09/18 09:00 [pubmed]
PHST- 2007/12/14 09:00 [medline]
PHST- 2007/09/18 09:00 [entrez]
AID - JBG675 [pii]
AID - 10.1111/j.1439-0388.2007.00675.x [doi]
PST - ppublish
SO  - J Anim Breed Genet. 2007 Oct;124(5):277-85. doi: 
      10.1111/j.1439-0388.2007.00675.x.