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Estimation Of Breed-Specific Heterosis Effects For Birth, Weaning And Yearling Weight In Cattle., L. N. Schiermiester, R. M. Thallman, L. A. Kuehn, M. L. Spangler
Estimation Of Breed-Specific Heterosis Effects For Birth, Weaning And Yearling Weight In Cattle., L. N. Schiermiester, R. M. Thallman, L. A. Kuehn, M. L. Spangler
Department of Animal Science: Faculty Publications
Heterosis, assumed proportional to expected breed heterozygosity, was calculated for 4,835 individuals with birth, weaning and yearling weight records from Cycle VII of the U.S. Meat Animal Research Center Germplasm Evaluation Program. Heterosis was further estimated by proportions of British x British (BxB), British x Continental (BxC) and Continental x Continental (CxC) crosses. Angus and Red Angus were considered a single breed for estimation of heterosis. Direct heritability estimates (SE) for birth, weaning and yearling weight were 0.39 (0.05), 0.18 (0.04) and .40 (0.06), respectively. The BxB covariate was significant and BxC approached significance for weaning weight. The BxB proportion …