Two-, three- and four-breed rotational crossbreeding systems were evaluated for reproduction and weaning traits over four generations. Angus (A), Brahman
 (B), Charolais (C) and Hereford (H) breeds were included such that each rotation system included B. Three- and four-breed rotation systems weaned more and heavier calves than two-breed rotation systems. Rotation combinations including C weaned
 heavier calves but generally had lower weaning rates.

D. E Franke

Proceedings of the World Congress on Genetics Applied to Livestock Production, Volume XV. Beef cattle, sheep and pig genetics and breeding, fibre, fur and meat quality., , 283–286, 1990
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