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Studies on improvement of Cheju native cattle by three-breed crossing. 1. Genetic and environmental effects on preweaning growth of Cheju, Brahman, Santa Gertrudis, Charolais and Holstein cattle and their two- and three-way crosses



Studies on improvement of Cheju native cattle by three-breed crossing. 1. Genetic and environmental effects on preweaning growth of Cheju, Brahman, Santa Gertrudis, Charolais and Holstein cattle and their two- and three-way crosses



Research Reports of the Rural Development Administration, Livestock 33(2): 1-5



Among the pure breeds, body weights at birth and at 3 and 6 months of age were lowest for Cheju cattle and highest for Holsteins. Among the crossbreds, the least-squares constants for the two 2-way crosses studied (Brahman X Cheju and Santa Gertrudis X Cheju) were negative for 3- and 6-month weights, while those of 3-breed crosses were positive, the highest value being for Charolais X (Santa Gertrudis X Cheju).

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