《中国畜牧兽医》 ›› 2019, Vol. 46 ›› Issue (6): 1628-1635.doi: 10.16431/j.cnki.1671-7236.2019.06.008

• 动物营养与饲料科学 • 上一篇    下一篇

兰州大尾羊×小尾寒羊F1代体重和体尺的相关性研究

陆会宁1, 刘妍妍1, 张丽1, 金鑫1, 何林波1, 曹忻2   

  1. 1. 西北民族大学生命科学与工程学院, 兰州 730030;
    2. 西北民族大学实验教学部, 兰州 730030
  • 收稿日期:2018-12-22 出版日期:2019-06-20 发布日期:2019-06-19
  • 通讯作者: 曹忻 E-mail:caoxin-juliet@163.com
  • 作者简介:陆会宁(1979-),男,甘肃会宁人,博士生,研究方向:分子生物学与分子生物学,E-mail:lzz.316@163.com;刘妍妍(1998-),女,贵州黎平人,本科生,研究方向:动物科学,E-mail:2311288101@qq.com
  • 基金资助:

    西北民族大学实验室开放项目(SYSKF-2019191);中央高校专项基金项目(31920160004、31920170172);西北民族大学本科生科研创新项目(Y18100)

Correlation Analyses Between Body Weight and Body Sizes of F1 Hybrid of Lanzhou Fat-tailed Sheep×Small-tailed Han Sheep

LU Huining1, LIU Yanyan1, ZHANG Li1, JIN Xin1, HE Linbo1, CAO Xin2   

  1. 1. College of Life Science and Engineering, Northwest Minzu University, Lanzhou 730030, China;
    2. Experiment Teaching Department, Northwest Minzu University, Lanzhou 730030, China
  • Received:2018-12-22 Online:2019-06-20 Published:2019-06-19

摘要:

本研究旨在探讨兰州大尾羊×小尾寒羊F1代羔羊体重和体尺的相关关系,为通过体尺性状估计其体重提供科学的理论依据。试验随机选取80只150日龄兰小杂交F1代羔羊,公、母羔各半,测量其体重(Y)、体长(X1)、体高(X2)、胸围(X3)、管围(X4)、胸深(X5)和胸宽(X6),运用SPSS 22.0软件分别对公、母羔的体重和体尺数据进行相关性分析、通径分析、逐步线性回归分析和相关系数的分解。结果表明,兰小杂交F1代羔羊的体重与体长、体高、胸围、管围、胸深、胸宽均呈极显著正相关(P<0.01),公、母羔胸围与体重的相关程度最高,相关系数分别为0.907和0.908,其次为体长,相关系数分别为0.875、0.844。各体尺性状间也呈极显著正相关(P<0.01),其中胸围和体长的相关系数最高。胸围和体长主要通过直接作用影响体重,胸深、管围、体高、胸宽主要通过间接作用影响体重,胸围对体重的直接作用最大,胸深对体重的间接作用最大。公、母羔体重与体尺的最优回归方程分别为:Y=-43.861+0.675X3+0.394X1r=0.945,P<0.01)和Y=-38.378+0.590X3+0.397X1r=0.948,P<0.01)。综上所述,胸围和体长是影响兰小杂交F1代羔羊体重的两个重要因素,在该品种的选育和肥羔的生产过程中,要加强对胸围和体长的选择力度,同时考虑胸深、管围、体高、胸宽的影响。

关键词: 兰小杂交羔羊; 体重; 体尺; 相关性; 通径; 逐步线性回归

Abstract:

The aim of this study was to investigate correlation between body weight and body sizes of F1 hybrid of Lanzhou Fat-tailed sheep×Small-tailed Han sheep,which could provide scientific theory basis for estimation of weight through its body sizes.In the experiment,80 F1 hybrids of Lanzhou Fat-tailed sheep×Small-tailed Han sheep with 40 lambs of each sex at 150 days of age were selected randomly as objects.The body weight (Y),body length (X1),body height (X2),chest circumference (X3),cannon circumference (X4),chest depth (X5),chest width (X6) of lambs were measured.The phenotypic correlation analysis,path analysis,stepwise linear regression analysis and subdivision of correlation coefficients between the body weight and body sizes of rams and ewes were performed using SPSS 22.0 software.The results indicated that there were extremely significant positive correlations between body length,body height,chest circumference,cannon circumference,chest depth,chest width and body weight of F1 hybrid of Lanzhou Fat-tailed sheep×Small-tailed Han sheep (P<0.01).The correlation degree between chest circumference and body weight was the highest,the correlation coefficients were 0.907 and 0.908 in rams and ewes,respectively.The correlation degree between body length and body weight was followed whose correlation coefficient of rams was 0.875,and that of ewes was 0.844.Extremely significant positive correlations were also found among body sizes traits (P<0.01),in which,the correlation coefficient between chest circumference and body length was the highest.Chest circumference and body length mainly had an effect on body weight by direct action,while chest depth,cannon circumference,body height and chest width mainly affected body weight through indirect effect.The direct impact of chest circumference on body weight was the greatest and the indirect influence of chest depth on body weight was the highest.The optimal regression equation between the body weight and body sizes of rams and ewes were Y=-43.861+0.675X3+0.394X1(r=0.945,P<0.01),Y=-38.378+0.590X3+0.397X1(r=0.948,P<0.01).In conclusion,chest circumference and body length were two important factors influencing body weight of F1 hybrid of Lanzhou Fat-tailed sheep×Small-tailed Han sheep.In the process of breeding and fattening,the choice of chest circumference and body length should be strengthened while the influence of chest depth,cannon circumference,body height and chest width also should be considered.

Key words: Lanzhou Fat-tailed sheep×Small-tailed Han sheep; body weight; body sizes; correlation; path; stepwise linear regression

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