Formation of optimal composite populations.
The optimal breed composition of a composite population is derived from straightbred and average heterotic effects. It is demonstrated that there is a unique breed composition which maximizes a bioeconomic objective for a composite of m breeds. A forward stepwise approach for determination of the number of breeds to include in the composite population is advocated. Two examples of optimal composite populations are presented and briefly discussed using simulated net returns to weaning and through slaughter as objectives.
Roman L. Hruska U.S. Meat Animal Research Center, USDA-ARS, P.O. Box 166, 68933-0166, Clay Center, NE, USA.
M D
MD
Macneil