Phenotypic Variation of cattle - looking for academic sources Can someone please point me in the direction of a good academic article on the following: What are possible sources of phenotypic variation of different 400 day weights of cattle? Furthermore how much variation is likely to be due to each contributing source? I have tried the following searches in google scholar: * Phenotypic, genetic, environmental cattle weight * Phenotypic variation cattle weight * Phenotypic variation * Phenotypic variation, genetic * genetic variation, dam, sire

Online Mendelian Inheritance in Animals (OMIA) is a database of genes, inherited disorders and traits in more than 135 animal species (other than human and mouse). At the moment, it has about 400 entries for _Bos taurus_, mostly disease phenotypes. This is probably the only attempt to exhaustively list such phenotypes.