00840nam a2200253 a 450000100080000000500110000800800410001910000180006024500440007826000380012230000090016050000180016952002540018765000170044165000160045865000140047465000160048865000100050465000120051465300150052665300180054165300190055965300080057814319982007-07-09       1978    bl uuuu  m   00u1 u    #d1 aFAVERO, J. A.  aMaternal performance of Yorkshire sows.  aIowa: Iowa State Universityc1978  a75p.  aTese Mestrado  aThe purpose of this study was to evaluate genetic and phenotypic parameters of nine litter traits from a group of Yorkshire first litter gilts. The data included 294 litters produced from 1971 to 1976 at the Bilsland Memorial Farm near Madrid, Iowa.  aheritability  alitter size  aLeitegada  aPerformance  aPorca  aTamanho  aDesempenho  aHerdabilidade  aRaca Yorkshire  aSow