Evaluation of Crossbreeding Systems for Preweaning Traits in Beef Cattle
نویسندگان
چکیده
SUMMARY four-generation crossbreeding experiment with Hereford, Angus a from a tt1e were analyzed. Individual, maternal, and grand-maternal rthorn c: rotic effects on the composite trait of calf weight weaned per I e and h\~eeding and its component traits were evaluated. The parameter e."osed to then used to project performance at equ i 1 i bri urn under rotat i on teS ~ere The average of two-breed cross rotations is expected to increase r~lng. ned per cow exposed by 18 percent above the average of the three Ight w~: The three-breed cross rotat i on is expected to increase calf • t bre~ ~r cow exposed by 23 percent above the average of the three weane d~ For the average of all two-breed cross rotations combined with • t ~r:~ re' crossbreedi ng system, the expected increase inca lf wei ght Ina coW exposed above the average of a 11 straight breeds is 24 percent. per basis the expectati on for a three-breed cross rotation combined • ~:ina 1 sire crossbreedi ng system is 28 percent.
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Estimation of genetic and crossbreeding parameters for preweaning traits in German Angus and Simmental beef cattle and the reciprocal crosses.
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