Abstract:The growth performance and slaughter performance of Australian white, Suffolk, Dolper and lake sheep were measured by different crosscrosses.The results show that: (1)The birth weight of F1 generation in Australian white × lake sheep, Dolper× lake sheep, Suffolk × lake sheep, Australian white × Dolper × lake sheep and Suffolk × Dolper × lake sheep groups was significantly higher than that of lake sheep group (P?0.05), the weight of F1 generation at 1 month old and 3 month old was significantly higher than that of lake sheep group (P?0.01), and the F1 generation weight at 6 months old Australian white × lake sheep, Dolper× lake sheep,Australian white × Dolper × lake sheep,Suffolk × Dolper × lake sheep compared with Lake sheep groups shows significantly different (P?0.01). There was significant difference between Suffolk × lake sheep group and lake sheep group (P?0.05).(2)There were significant differences in premortem weight, carcass weight and net meat weight between Australian white × lake sheep, Dolper× lake sheep, Australian white × Dolper × lake sheep and Suffolk × Dolper × lake sheep combination and lake sheep and Suffolk × lake sheep group (P?0.01), while there were significant differences between Suffolk × lake sheep and lake sheep group and lake sheep group (P?0.05). There were significant differences in slaughter rate, net meat rate, meat to bone ratio and eye muscle area between the five hybrid combinations and lake sheep group (P?0.05), extremely significant differences in net meat rate and meat to bone ratio (P?0.01) and extremely significant differences in eye muscle area (P?0.01).(3)The marbling of Australian white × lake sheep,Australian white × Dolper × lake sheep ,Suffolk × Dolper × lake sheep and lake sheep groups were significantly different (P < 0.05). The water loss rate of Australian white × Dolper × lake sheep and Suffolk × Dolper × lake sheep was significantly lower than that of the other groups (P < 0.05), and the cooked meat rate was significantly higher than that of the other groups (P < 0.05), indicating that the three-part hybrid mutton had better water system and stronger preservation ability. The results of crossbreeding experiments with Australian white ram, Duper ram, Suffolk ram and lake sheep are obvious, and can be vigorously promoted in similar ecological conditions.
