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Heterosis effects were evaluated as traits of the dam in F2 progeny of F1 dams and F3 and F4 progeny of F2 and F3 dams in 3 composite breed types. Breed effects were evaluated for the 9 parental breeds (Red Poll, Hereford, American Angus, Limousin, Brown Mountain, Pinzgauer, Gelbvieh, Simmental and ...

Gregory, K. E.; Cundiff, L. V.; Koch, R. M.
Journal of Animal Science, 1991, 69, 9, pp 3574-3589