The analysis on growth performance of the improved Hu sheep by crossbreeding with east-friesian sheep
[Objective]The study was conducted to explore the improvement effect of Hu sheep growth performance by crossbreeding with East-Friesian sheep.[Method]Under the same conditions of feeding and management,five experimental groups were selected as follows:East-Friesian Sheep,Hu sheep,F1 lambs crossbred by East-Friesian sheep(♂)and Hu sheep(♀)(F1 lambs),F2 lambs crossbred by East-Friesian sheep(♂)and Hu sheep(♀)(F2 lambs)and transverse cross fixation group.Their body weight and body size from birth to 6-month-old were observed,and the effects of gender,parity,birth rank and ewe age on the growth performance of lambs were determined and the correlations among different growth traits were also analyzed.[Result]For the transverse-cross fixation group and F2 generation,the weights at 3-month-old and at 6-month-old,average daily gain from weaning to the 6-month-old,and chest circumfer-ence at 3-month-old were higher than those of Hu sheep(P<0.05).The average daily gain from birth to 6-month-old was the highest(211.53 g)in the transverse cross fixation group,followed by the F2 generation(206.27 g),and it was the lowest(165.70 g)in Hu sheep.The body height,chest measurement and circum-ference of cannon bone of Hu sheep at 6-month-old were significantly lower than those of the other groups(P<0.05).These results indicated that the East-Friesian sheep had a significant effect on the growth perfor-mance of Hu sheep.The body length,chest measurement and circumference of cannon bone of male lambs at 3-month-old were significantly higher than those of female lambs(P<0.05),and all the body size traits of male lambs at 6-month-old were significantly higher than those of female lambs(P<0.01).The birth weight and weaning weight of the fourth litter were significantly higher than those of the first three litters(P<0.05).The birth weight of the single and twins was significantly greater than that of triplets and quadru-plets.The weight of the 6-month-old lambs from 3-and 4-year-old ewes was significantly higher than that from the first-birth ewes(P<0.05).Parity,birth rank and ewe age had no significant effects on body size of lambs(P>0.05).The results of correlation analysis showed that the body weight and body size of lambs at weaning,3-month-old and 6-month-old were positively correlated.[Conclusion]After crossbreeding be-tween East-Friesian sheep and Hu sheep,the transverse cross fixation group and F2 lambs showed the obvi-ous heterosis.
east-friesian sheepHu sheepcrossbreeding and improvementweightdaily gainbody size
万方数据
维普
