中国畜禽种业 ›› 2023, Vol. 19 ›› Issue (9): 4-11.
• 遗传育种 • 上一篇
林雨浓，马万欣，包玲玲，何曙光，石顺利，张秋生，赵澈勒格日，高会江，李俊雅，王泽昭
Lin Yunong, Ma Wanxin, Bao Lingling, He Shuguang, Shi Shunli, Zhang Qiusheng, Zhao Chelegeri, Gao Huijiang, Li Junya, Wang Zezhao
摘要： 该研究分析了“科尔沁肉牛”群体的遗传多样性和种群结构，以期为“科尔沁肉牛”新品种培育和后续遗传改良提供遗传背景支撑。试验使用 Ilumina Bovine HD BeadChip 芯片对“科尔沁肉牛”群体 (n=437)、华西群体 (n=55) 和美系西门塔尔牛群体 (n=25) 进行基因分型，对其遗传多样性参数和群体结构进行统计分析，并对比三个群体的连锁不平衡衰减情况。研究结果表明:（1）“科尔沁肉牛”群体内中高频 (MAF0.3) 标记的数量多于华西牛和美系西门塔尔牛群体，且“科尔沁肉牛”群体遗传多样性在三个群体内最高。（2）“科尔沁肉牛”群体和美系西门塔尔牛群体具有相似的遗传组成，与华西牛群体的遗传距离相对较远。从群体结构来看“科尔沁肉生”群体内部分个体与美系西门塔尔牛群体遗传分化较差。（3）“科尔沁肉牛”群体远端标记的连锁能力在三个群体中处于比较低的情况。从整体来看，“科尔沁肉生”与华西牛及美系牛之间存在明显的遗传距离。尽管科尔沁牛的选育工作正在持续进行，但相对于美系西门塔尔牛和华西牛，其选择强度仍有提高的空间。
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