UNASSIGNED: Recent studies on data from the Dutch Warmblood Studbook (KWPN) have shown that the ongoing specialization of @entity1641 for either dressage (DH) or show jumping ( @entity12808 ) has led to a decreasing genetic relationship between the two subpopulations. The aim of this study was to analyse the effect of the specialization process on the genetic parameters of traits measured in the studbook-entry inspection of KWPN during the last fifteen years. Data from 18  125 DH and 23  800 @entity12808 recorded from 1998 until 2013 were used to analyse 13 traits scored in both DH and @entity12808 . Analyses were performed in a Bayesian framework. Firstly, variance components were estimated based on the whole data set. Secondly, genetic correlations between traits measured in DH or @entity12808 were estimated using bivariate analyses. Thirdly, three time periods were defined and genetic correlations between subpopulations were estimated within each period. Heritability was moderate (0.17-0.39) for both DH and @entity12808 . Genetic correlations between traits measured in DH or @entity12808 were not different from one considering the posterior standard deviation of the estimation; however, in most of the traits, a clear trend in reduction of the genetic correlation for traits expressed in DH and @entity12808 and an increase in their posterior standard deviation for recent years was observed. These results suggest that specialization could lead to differences in traits measured in DH and @entity12808 in the recent years.

Effect of specialization on genetic parameters of studbook-entry inspection in Dutch Warmblood XXXX .

@entity12808 :: ('MESH:C566556', 'Disease') :: ['JH'] @entity1641 :: ('9796', 'Species') :: ['horses']
@entity1641 :: (9796,Species) :: ['horses']
