Longitudinal records of four growth traits (bodyweight, wither height, foreleg length and cannon bone length) were taken for 291 breeding warmblood weanling colts between October 2004 and May 2005. For the genetic analysis average daily gain, respectively average monthly growth rates for the other selected traits were calculated for each colt. Genetic parameters of all traits were estimated multivariate with an animal model that included the fixed effects breeding farm, season of birth (early/late) of the colts and the random additive genetic effect of the animal. The heritability estimates were 0.23, 0.32, 0.05, and 0.22, respectively, for daily gain, monthly growth of wither, monthly growth of foreleg length and monthly growth of cannon bone length. High genetic correlations were estimated between monthly growth of foreleg and monthly growth of cannon bone (rg=0.91), respectively monthly growth of wither (rg=0.86). Medium correlations were found between monthly growth of wither and monthly growth of cannon bone (rg=0.57), accordingly for daily gain (rg=0.52).
Proceedings of the World Congress on Genetics Applied to Livestock Production, Volume , , 08.13, 2006
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