草食家畜Issue(4)：9-18,10.DOI:10.16863/j.cnki.1003-6377.2026.04.002
导入湖羊公羊多胎基因后杂交群体后代FecB基因型分布及早期生长性能比较
FecB Genotype Distribution and Early Growth Performance of Crossbred Offspring Derived from Hu Sheep Rams Carrying Multiparity Gene
摘要
Abstract
[Objective]To address the industry challenges of low lambing rates and limited growth performance improvement in local sheep of Changji Prefecture,this study introduced the FecB prolific gene into the local sheep population.By establishing purebred control groups and various hybrid experimental groups,the study aimed to screen for the optimal hybrid combination with the best overall production performance and to clarify the regulatory effects of the FecB gene on the growth performance of offspring.[Methods]The experiment comprised two purebred control groups(Kazakh sheep,KK;Xinjiang Fine-wool sheep,XX)and five hybrid experimental groups.Hu sheep rams with the FecB BB genotype were used as sires,mated respectively with Kazakh sheep(KH),Xinjiang Fine-wool sheep(XH),Kazakh×Suffolk F1 dams(KSH),Xinjiang Fine-wool×Suffolk F1 dams(XSH),and Xinjiang Fine-wool×German Merino F1 dams(XDH).The birth weight and body weight at 60 days of age of F1 lambs from each combination were measured,and FecB genotype distribution was determined to analyze its association with growth performance.[Results]FecB gene detection of all ewes participating in this experiment revealed that all were of the++wild-type,with no B allele detected.The frequency of the B+genotype in the F1 generation across the five hybrid experimental groups ranged from 46.7%to 53.3%,approximating the theoretical expected value of 50%.Among the seven experimental groups,the KSH group exhibited the best overall growth performance,with an average birth weight of 5.68±2.11 kg and an average body weight at 60 days of 24.88±7.33 kg,both of which were significantly higher than those of the purebred control groups and other two-way crossbreeding groups(P<0.05).Within the same crossbreeding combination,the growth performance of B+genotype lambs was significantly superior to that of++genotype lambs,with body weight at 60 days of age increasing by 8.04%~14.53%.Among all groups,the 60-day body weight of B+genotype lambs in the KSH group(25.90±2.80 kg)was the highest.[Conclusion]This study confirmed that introducing the FecB gene into the local sheep population of Changji Prefecture can effectively improve the growth performance of offspring.The Hu sheep×(Kazakh sheep×Suffolk F1)combination represents the optimal local hybrid combination,achieving a synergistic effect of prolific gene introgression and growth performance enhancement,thereby providing an optimal crossbreeding model and scientific basis for improving the quality and efficiency of the meat sheep industry in Changji Prefecture.关键词
湖羊/多胎经济杂交/多胎遗传改良Key words
Hu sheep/multiple-birth economic crossbreeding/multiple-birth genetic improvement分类
农业科技引用本文复制引用
张晴,傅文栋,张云生,吐尔洪·艾尼玩,杨金国,傅文奇,聂存喜..导入湖羊公羊多胎基因后杂交群体后代FecB基因型分布及早期生长性能比较[J].草食家畜,2026,(4):9-18,10.基金项目
新疆维吾尔自治区"天山英才"人才培养计划项目(2023TSYCJC0030) （2023TSYCJC0030）
