Canine hip dysplasia in Irish water spaniels: two decades of gradual improvement

[...]it is possible that there may be slight differences in the major causal genes/alleles in different breeds, and in order that a better understanding may be obtained for CHD generically, an argument could be made for individually studying as many breeds as possible. [...]work presented here reiterates the fact that CHD is a complex trait, which is almost certainly governed by multiple gene interactions. Biometrics 15, 417-423 Wilson B. J. Nicholas F. W. James J. W. Wade C. M. Tammen I. Raadsma H. W. Castle K. Thomson P. C. ( 2011 ) Symmetry of hip dysplasia traits in the German Shepherd Dog in Australia.