金川牦牛体躯结构及产肉性状的通径分析  

Path Analysis of Body Structure and Meat Production Traits of Jinchuan Yak

作　　者：袁龙飞 文勇立 扎升 毛昌秀 谭成贵 艾鷖 泽让东科 YUAN Longfei 1, WEN Yongli 1 , ZHA Sheng 2, MAO Changxiu 2, TAN Chenggui 2,AI Yi 1, TSERANG Donko Mipam 1(1. Institute of Qinghai-Tibetan Plateau,Southwest University for Nationalities,Chengdu 610041,China;2. Jinchuan County Animal Husbandry and Veterinary Medicine Service Center,Aba Sichuan 624100,China)

机构地区：[1]西南民族大学青藏高原研究院,四川成都610041 [2]四川阿坝州金川县畜牧兽医服务中心,四川阿坝624100

出　　处：《家畜生态学报》2018年第5期18-25,共8页Journal of Domestic Animal Ecology

基　　金：国家科技支撑计划课题(2014BAD13B03);创新型科研项目(CX2015SP472);优秀学生培养工程项目(13ZYXS79)

摘　　要：旨在探讨金川牦牛重要结构及产肉性状间的线性相关,以便筛选间接选择性状。利用30头金川牦牛共14个性状,分别以体重、体高、胸围、胴体重、净肉重5个性状为因变量,其他性状为自变量,进行通径分析。结果表明:(1)针对体重,胸围、坐骨端宽、体高等的直接作用较大,胸围、胸围与体斜长、坐骨端宽等的决定程度较大,胸深、胸围、体高等的决策系数较大;(2)针对体高,胸深、胸围、体重等的直接作用较大,胸深、胸深与胸围、胸深与体重等的决定程度较大,体重、胸围、尻高等的决策系数较大;(3)针对胸围,尻高、体斜长等的直接作用较大,尻高、尻高与体斜长、坐骨端宽等的决定程度较大,尻高、体斜长、胸深等的决策系数较大;(4)针对胴体重,体重、坐骨端宽、尻高等的直接作用较大,体重与胸深、体重与体斜长、体重与体高等的决定程度较大,体重、尻高、胸围等的决策系数较大;(5)针对净肉重,体重、体高、胸深等的直接作用较大,体重与胸深、体重与体斜长、体重与体高等的决定程度较大,体重、胸深、体高等的决策系数较大。结论:各因变量的间接选择性状为:体重—胸围、坐骨端宽等,体高—体重、胸围等,胸围—体斜长、尻高等,胴体重—体重、尻高等,净肉重—体重、胸深等。The paper studied the linear correlation between the important structural traits of Jinchuan yaks so as to screen indirect selection traits. In the 14 traits of 30 Jinchuan Yaks, five indicators such as body weight and body height were taken as the dependent variables, the other traits independent variables, and the path analysis was carried out. The results show that （1） The chest circumference, the width of the sciatic end and the body height have a large positive direct effect on body weight.The chest circumference, chest circumference and body oblique length, sciatic width in turn have largely determined the body weight; chest depth, chest circumference, body height have higher decision coefficient on body weight respectively; （2） Chest depth, chest circumference and body weight and so on have a large positive direct effect on body height. Chest depth, chest depth and chest circumference, chest depth and body weight respectively have a greater degree of determination on body height; body weight, chest circumference, croup height have a larger decision coefficient to the body height in turn. （3） Croup height and body oblique length have positive direct effect on the chest circumference in turn.Croup height, croup height and body oblique length, sciatic width sequentially have largely decided on the chest circumference; croup height, body oblique length, chest depth have a large decision coefficient on the chest circumference; （4） Body weight, sciatic width, and croup height have a positive direct effect on carcass weight.Body weight and chest depth, body weight and body oblique length, body weight and body height have largely determined the carcass weight; body weight, croup height and chest circumference have a large decision coefficient on the carcass weight; （5） Body weight, body height, chest depth and so on in turn have a positive direct effect on the net meat weight.Body weight and chest depth, body weight and body oblique length, body weight and body height have largely decided on th

关 键 词：金川牦牛 结构性状 产肉性状 通径分析 

分 类 号：S811.5[农业科学—畜牧学]