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7. Genetic and phenotypic relationships among endocrine and traditional fertility traits and production traits in Holstein-Friesian dairy cows. Royal MD, Flint AP, Woolliams JA. J Dairy Sci; 2002 Apr; 85(4):958-67. PubMed ID: 12018442 [Abstract] [Full Text] [Related]
8. Additive and nonadditive genetic effects on milk production in dairy cattle: evidence for major individual heterosis. Ahlborn-Breier G, Hohenboken WD. J Dairy Sci; 1991 Feb; 74(2):592-602. PubMed ID: 2045565 [Abstract] [Full Text] [Related]