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Heterosis from crosses among British breeds of beef cattle



Heterosis from crosses among British breeds of beef cattle



Genetics today. Proc. Xlth int. Congr. Genet, The Hague 1: 265-266



This experiment was designed to estimate heterosis in beef calves resulting from various levels of breed crossing, not confounded with heterosis in maternal traits of their dams. Purebred or high-grade Aberdeen-Angus, Hereford and Shorthorn cows, here designated as " straightbreds ", were mated to purebred bulls of these 3 breeds to produce straightbred and reciprocal 2-breed cross calves. Similar straightbred cows were bred to crossbred bulls (F1) to produce 3-breed and backcross calves.

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