东佛里生羊杂交改良湖羊生长性能分析
杨舒童 , 王龙斌 , 张玉庭 , 沈继源 , 刘圆 , 郭世伟 , 郝志云 , 王继卿
甘肃农业大学学报 ›› 2024, Vol. 59 ›› Issue (06) : 24 -31.
东佛里生羊杂交改良湖羊生长性能分析
The analysis on growth performance of the improved Hu sheep by crossbreeding with east-friesian sheep
目的 探讨东佛里生羊对湖羊生长性能的杂交改良效果。 方法 在相同饲养管理条件下,选择出生年龄相近的东佛里生羊、湖羊、东佛里生羊(♂)× 湖羊(♀)杂交F1代羊(简称F1代)、东佛里生羊(♂)× 湖羊(♀)级进杂交F2代羊(简称F2代)以及横交固定组5个试验组,观测其初生至6月龄阶段的体重和体尺,并分析性别、胎次、出生等级和母羊年龄对羔羊生长性能的影响以及各生长性状间的相关性。 结果 横交固定组和F2代的3月龄重、6月龄重、断奶-6月龄平均日增重和3月龄胸围大于湖羊(P<0.05)。横交固定组的出生-6月龄平均日增重最大(211.53 g),其次为F2代(206.27 g),湖羊的最小(165.70 g)。湖羊的6月龄体高、胸围和管围均显著小于其他群体(P<0.05)。这表明东佛里生对湖羊生长性能有显著的杂交改良效果;公羔的3月龄体长、胸围和管围显著大于母羔(P<0.05),它的6月龄各项体尺性状均极显著大于母羔(P<0.01);第4胎羔羊的初生重和断奶重显著大于前3胎羔羊(P<0.05);单羔和双羔个体的初生重显著大于3羔和4羔个体;3岁和4岁母羊所产羔羊的6月龄重显著大于初产母羊所产羔羊(P<0.05)。胎次、出生等级和母羊年龄对羔羊体尺无显著影响(P>0.05)。相关性分析结果发现,羔羊在断奶、3月龄和6月龄时的体重与体尺指标间呈明显的正相关。 结论 东佛里生羊与湖羊杂交后,横交固定组与F2代羔羊的生长性能最优。
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 circumference 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 circumference 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 performance 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 quadruplets.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 between East-Friesian sheep and Hu sheep,the transverse cross fixation group and F2 lambs showed the obvious heterosis.
东佛里生羊 / 湖羊 / 杂交改良 / 体重 / 日增重 / 体尺
east-friesian sheep / Hu sheep / crossbreeding and improvement / weight / daily gain / body size
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甘肃省基础研究创新群体项目(22JR5RA829)
兰州市科技计划项目(2021-1-162)
甘肃农业大学校级研究生联合培养基地(GAU2022-008)
甘肃农业大学学科团队项目(GAU-XKTD-2022-21)
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