ZHOU Xiaobing;WANG Zhongquan;ZOU Guangbin;BrightPig Co., Ltd.;

ZHOU Xiaobing%WANG Zhongquan%ZOU Guangbin%BrightPig Co., Ltd.

Canada Duroc pigs;;America Duroc pigs;;France Landrace-Yorkshire sows;;PIC 399;;growth rate;;pork traits

In order to find high-quality and efficient terminal sire breeds for introduction, breeding and feeding on large scale pig farms, we chose different breeds of herd boars including PIC399, America Duroc pigs and Canada Duroc pigs, intercrossed them with France Landrace-Yorkshire sows, and measured the average daily gain(ADG), feed intake, feed conversion rate, carcass grading of hybrid pigs.The results showed that the daily gain was the highest in the group of Canada Duroc pigs(GC), and their required daily age for 100 and 115 kg was higher than the groups of American Duroc pigs(GA) and PIC399 pigs(GP), with significant difference from the GC group(P<0.05). The feed conversion rate was the highest in the GA group, and the feed-gain ratios at the weights of 100 kg and 115 kg were lower than the GC group and the GP group, with significant difference from the GP group(P<0.05) but no significant difference from the GC group(P>0.05). The back fat of the slaughtered pigs was the lowest in the GA group, and at the weight of 100 kg and 115 kg significantly lower than both the GC and GP groups(P<0.05). At the weight of 100 kg, the eye muscle area of the GP group was larger than that of the GA and GC groups, with significant difference from the GC group(P<0.05). When the weight reached 115 kg, the eye muscle area of the GA group was the largest, which was significantly different from that of the GC group(P<0.05). In terms of the eye muscle area, the GA group was more suitable for raising large pigs. In the perspective of economic benefit, the group with the best profitability is the GA pigs. When the weight reached 100 kg and 115 kg, their sales profit was higher than the GC and GP groups.