荷斯坦奶牛外貌性状对305d产奶量的通径分析  

Path Analysis Between Appearance Traits and 305 d Milk Yield of Holstein Cows

作　　者：龚争 程郁昕[1] GONG Zheng;CHENG Yuxin(College of Animal Science,Anhui Science and Technology University,Fengyang 233100,China)

机构地区：[1]安徽科技学院动物科学学院,安徽凤阳233100

出　　处：《安徽科技学院学报》2019年第1期1-4,共4页Journal of Anhui Science and Technology University

基　　金：安徽省高校自然科学研究重点项目(KJ2018A0541)

摘　　要：目的:以荷斯坦奶牛为研究对象,研究其外貌性状对305d产奶量的通径分析。方法:选择淮南益益乳品公司第一奶牛场,随机抽取荷斯坦奶牛180头,其中1～3胎各60头,测定外貌性状体高(x_1)、胸宽(x_2)、体深(x_3)、尻角度(x_4)、尻宽(x_5)、后肢侧视(x_6)、蹄角度(x_7)等指标并评定线性分数,同时记录305d产奶量(y),研究奶牛外貌性状对305d产奶量的通径分析。结果:测定的外貌性状(尻角度除外)与305d产奶量均为正相关。通径分析中,尻宽、蹄角度、体高是对305d产奶量影响较大的3个性状,前两者以直接影响为主导,后者以间接影响为主导。结论:荷斯坦奶牛外貌性状对305d产奶量有一定的直接与间接影响。Objective:To execute 305 d milk yield of Holstein cows based on appearance traits via the path analysis.Methods:180 Holstein cows in the first cow farm of Huainan YiYi,with 60 cows at 1-3 fetals respectively,were randomly sampled to be measured appearance traits,be linear evaluated further,which including body height(x1),chest width(x2),body depth(x3),rump angle(x4),rump width(x5),rear leg side view(x6),and foot angle(x7)and 305 d milk yield(y),in order to make path analysis between appearance traits and 305 d milk yield of Holstein cows.Results:There were positive correlation between appearance traits(except rump angle)and 305 d milk yield.In the path analysis,rump width,foot angle,and body height were the three traits that had great influence on 305 d milk yield.The first two traits are dominated by direct influence and the latter by indirect influence.Conclusion:The appearance traits of Holstein cows had direct and indirect influences on 305 d milk yield.

关 键 词：荷斯坦奶牛 外貌性状 305D产奶量 相关系数 通径分析 

分 类 号：S823[农业科学—畜牧学]