作 者：
张梅;李涛;刘宜勇;刘建明;褚洪忠;陈春华;杨光维;张志东;团勇;吐来力江;邱梅玉
单 位：
伊犁职业技术学院;新疆畜牧科学院生物技术研究所;伊犁州畜牧科学研究所
关键词：
特哈杂交羔羊;体重;体尺;相关性;通径;逐步线性回归
摘 要：
本研究通过对哈萨克羊×特克赛尔羊杂交F_1代体重与体尺指标的相关及回归分析进而建立最佳回归方程,为品种选育提供可靠的科学依据。试验随机选取特哈杂交F_1代公羔184只、母羔174只,对其测量体重(Y),体高(X_1)、体斜长(X_2)、胸围(X_3)、胸宽(X_4)、胸深(X_5)、管围(X_6),运用SPSS19.0分别对公、母羔的体重和体尺数据进行相关及回归分析建立最佳线性回归方程。特哈杂交F_1代羔羊体重与6项体尺指标均呈现极显著正相关(P<0.01),公、母羔体斜长与体重的相关程度最高,分别为0.641和0.555。各体尺间除公羔胸围和胸宽两项体尺指标与胸深没有显著相关性外,其它各体尺间都表现出极显著的相关性(P<0.01),其中相关程度公羔最高的为体高和胸深,母羔为体高与体斜长。公羔胸围对体重的直接作用效果最大,母羔胸深对体重的直接作用最大,而公、母羔体尺指标对体重的间接作用正好与之相反。公、母羔体重与体尺指标间的最佳回归方程分别为Y=-74.203+0.272X_2+0.357X_3+0.285X_1+0.159X_4+0.129X_6,(r=0.832,P<0.01)和Y=-59.179+0.295X_2+0.296 X_5+0.209 X_4+0.184 X_1,(r=0.723,P<0.01)。体斜长是影响特哈F_1代羔羊体重的重要因素,在品种选育过程中要着重考虑该体尺指标的选育,同时充分考虑其它体尺指标的影响。
译 名：
Correlation and Regression Analysis of Body Size and Body Weight of F_1 Generation of Kazakh Sheep and Texel Sheep
作 者：
ZHANG Mei;LI Tao;LIU Yi-yong;LIU Jian-ming;CHU Hong-zhong;CHEN Chun-hua;YANG Guang-wei;ZHANG Zhi-dong;TUAN Yong;TU Lai-lijiang;QIU Mei-yu;Yili Vocational and Technical College;Yili Animal Husbandry Science Research Institute;Institute of Biotechnology,Xinjiang Academy of Animal Husbandry;
关键词：
hybrid of Kazak × Texel sheep;;body weight;;body size;;correlation;;path;;stepwise linear regression
摘 要：
The aim of study was to investigate correlation and regression analysis between weight and body size index of F_1hybrid of Kazak×Texel sheep.The best regression equation was established,which could provide scientific theoretical basis for breeding.In the experiment,184male and 174female of F_1hybrid lambs were selected randomly,their body weight(Y),body height(X_1),body length(X_2),chest circumference(X_3),chest width(X_4),chest depth(X_5),and tube circumference(X_6)were measured.SPSS 19.0was used to conduct correlation and regression analysis on the body weight and body size data of male and female lambs to establish the best linear regression equation.The body weight of F_1hybrid of Kazak×Texel sheep was significantly positively correlated with six body size indexes(P<0.01),and the correlation degree between body length and body weight of male and female lambs was the highest,which were 0.641and 0.555,respectively.There were extremely significant correlation between the body sizes(P<0.01),except that there were no significant correlation between chest circumference and chest width and chest depth in rams,among which the highest correlation were body height and chest depth in rams,and the body height and body slant length in ewes.The direct impact of chest circumference on body mass was the greatest in rams,the direct impact of chest depth on body weight the greatest was in ewes,while the body size had the opposite indirect effect on weight in rams and ewes.The optimal regression equations between body weight and body size were Y=-74.203+0.272X_2+0.357X_3+0.285X_1+0.159X_4+0.129X_6(r=0.832,P<0.01)and Y=-59.179+0.295X_2+0.296X_5+0.209X_4+0.184X_1(r=0.723,P<0.01).The body length deviation was an important factor affecting body quality of F_1hybrid of Kazak×Texel sheep.In the breeding process,we should enhance the selection body size index,and consider fully the influence other body size indexes.
