乾华肉用美利奴羊的染色体核型研究及G-带分析  

Chromosome Karyotype and G-band Analysis of Qianhua Mutton Merino Sheep

作　　者：赵国春 李晓涵 董小美 肖鑫银 李佳蓉[1] 陈洋[1] 姜怀志[1] ZHAO Guochun;LI Xiaohan;DONG Xiaomei;XIAO Xinyin;LI Jiarong;CHEN Yang;JIANG Huaizhi(College of Animal Science and Technology,Jilin Agricultural University,Changchun130118,China)

机构地区：[1]吉林农业大学动物科学技术学院,长春130118

出　　处：《中国草食动物科学》2022年第2期26-29,共4页China Herbivore Science

基　　金：大学生创新创业训练计划项目(201810193023)。

摘　　要：旨在研究新品种乾华肉用美利奴羊染色体的核型和G-带,揭示该品种的染色体数目和结构变异特征。采用外周血淋巴细胞培养法及常规染色体标本制备技术,分析染色体核型和G-带。结果表明,乾华肉用美利奴羊二倍体染色体数目为2n=54,26对常染色体中有3对为中着丝粒染色体,23对端着丝粒染色体;在性染色体中,X染色体为最大的端着丝粒染色体,Y染色体为最小的中着丝粒染色体。综上,乾华肉用美利奴羊染色体数目为2n=54(占95.8%),G-带与其他绵羊品种的G-带基本一致。This article aims to study the chromosome karyotype and G-banding of Qianhua Mutton Merino sheep,to reveal the chromosome number and structural variation of the breed.The karyotype and G-band of chromosome were analyzed by peripheral blood lymphocyte culture and routine chromosome specimen preparation technology.The results showed that the diploid chromosome number of Qianhua Mutton Merino sheep was 2n=54,3 of the 26 pairs of autosomes were metacentric chromosomes and 23 pairs of terminal centromeric chromosomes;among sex chromosomes,X chromosome is the largest telocentric chromosome and Y chromosome is the smallest mesocentric chromosome.The chromosome number of Qianhua Mutton Merino sheep is 2n=54(95.8%),and the G-band is basically consistent with that of other sheep breeds.

关 键 词：乾华肉用美利奴羊 染色体 核型分析 G-带 

分 类 号：S826.2[农业科学—畜牧学]