In order to explore the crossbreeding combination of beef cattle breeds in the hot areas,Six bull combinations of Angus,Wagyu cattle,Short-horn cattle,Yunling cattle,Wenshan cattle and Dulong cattle were crossbred with the Black Angus cows introduced from Australia,of which the mating ratio was 1:30(1 male:30 fe-male).The results showed that Angus cattle had high reproductive performance,and 314 calves yielded mating with 337 cows,with a calving rate of 93.17%.The survival rate of calves in the herd was 99.91%,and the repro-ductive survival rate was 97.64%.Among them,the average birth weight of Angus cattle was 34.16±4.01 kg,while the birth weights of F1 hybrids of Short-horn×Angus,Yunling×Angus,Wagyu cattle×Angus,Wenshan cattle×Angus,Dulong cattle×Angus were 34.61±5.87 kg,33.57±5.80 kg,32.48±4.06 kg,28.10±1.79 kg,and24.71±6.24 kg,respectively.The hybridization effect of Black Angus crossbreed introduced breeds represented better,of which the birth weights among the crossbreeding combinations was not significant(P＞0.05).But the F1 birth weight of Wenshan cattle×Angus was significantly lower than those of the introduced hy-brids(P＜0.05),and the F1 birth weight of Dulong cattle×Angus was extremely significantly lower than those of the introduced breed(P＜0.01),and significantly lower than that of Wenshan cattle×Angus F1(P＜0.05).This study preliminarily revealed the crossbreeding effects of different combinations for Angus cattle,providing posi-tive scientific references for future breeding.
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