Article
Performance of Holstein clones in the United States.
Journal of dairy science - 1 Mar 2004
Norman H D, Lawlor T J, Wright J R, Powell R L
Abstract excerpt
Phenotypic and genetic performance of US Holstein clones from embryo splitting (ETS) and nuclear transfer (ETN) was documented for yield and fitness traits. Holstein Association USA has registered 2319 ETS and 215 ETN clones. The number of male clones has decreased. Animals selected for cloning were slightly superior genetically to population mean for yield traits. For females, mean superiority of pedigree merit...
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