全放牧婆罗门牛和BMY牛胚胎回收适期的探讨  

Investigation into Suitable Time of Embryos Recovery of Brahman and BMY Cattle in Whole Year Grazing

作　　者：和占星[1] 和协超[2] 张继才[1] 王喆[1] 朱芳贤[3] 铃木达行 赵刚[1] 亐开兴[1] 

机构地区：[1]云南省草地动物科学研究院,云南昆明650212 [2]中国科学院昆明动物研究所,云南昆明650223 [3]天津市奶牛发展中心,天津300221 [4]山口大学,日本山口753-8515

出　　处：《西南农业学报》2009年第2期467-469,共3页Southwest China Journal of Agricultural Sciences

基　　金：云南省省院省校合作项目(2005YX02);云南省自然科学基金项目(2001C0077M);云南省“十五”科技攻关项目(2001NG36)

摘　　要：选用婆罗门牛和BMY牛供体超数排卵，以第1次人工授精（AI）当日为0d，分别在AI第6～6．5天、7—7．5天和8—8．5天回收胚胎，统计≤16细胞胚、桑椹胚、囊胚和孵化胚的数量，计算各发育阶段胚胎所占的百分率，分析婆罗门牛和BMY牛的胚胎回收适期。结果表明：婆罗门牛AI第6～6．5天的桑椹胚率比BMY牛高43．54个百分点（P〈0．01），AI第8～8．5天的孵化胚率比BMY牛高35．94个百分点（P〈0．05），胚胎发育速度比BMY牛较快。罗门牛和BMY牛在AI第6～6．5天回收胚胎的囊胚率低，而第8—8．5天的孵化胚率高，胚胎回收以AI第7—7．5天为宜。The superevulation treatment was applied to the Brahman donors and its crossbreed （BMY cattle）. The embryos was recovered on 6 -6.5, 7 -7.5 and 8 -8.5 d after the first AI and the number and percentage of the cell embryos （ ≤16 cells）, morulas, blastocysts and hatched embryos were counted to obtain the optimum time of recovering the embryo of Brahman and BMY cattle. The results showed that the peacentage of the morula of Brahman donors was higher 43.54 percent points than that of the BMY catfles on 6 - 6.5 d after the first AI（ P 〈 0.01 ）, the percentage of the hatched embryos of Brahman donors was higher 35.94 percent points than that of the BMY cattles on 8 - 8. 5 d after the first At（ P 〈 0.01 ）, the development rate of the Brahman donors was quicker than that of the B MY cattles, the blastocyst rate of the Brahman donors and the BMY caries was lower when the embryos were recovered 6 - 6.5 d after the first AI, but those hatched embryos rate was higher on 8 -8.5 d after the first AI, so the optimum time of recovering the embryo was on 7 -7.5 d after the first AI.

关 键 词：全放牧 婆罗门牛 BMY牛 胚胎回收 

分 类 号：S823[农业科学—畜牧学]