平坝灰鹅体尺性状的相关分析

Correlation analysis on body measurements traits in Pingba gray goose

随机抽取相同放养条件下同批出雏、健康无病及体况相近的14周龄平坝灰鹅66只(♂35,♀31)进行体尺性状测定,结果表明,公鹅的体重、胸宽、胫围和胫长均显著或极显著高于母鹅,其他体尺指标没有呈现出差异显著水平;相关分析结果显示,体斜长与龙骨长及胸深与胫围间不存在显著相关,其他各体尺指标间均达到了显著或极显著相关水平;体重与各体尺指标间的回归分析结果表明,最优回归方程为Y=-787.718+61.742X2+94.298X4+234.253X6,模型决定系数(R2)=0.557,其中龙骨长(X2)、胸宽(X4)和胫围(X6)的系数估计值均达到极显著水平。

In this study,66 geese （ ♂： 35,♀：31） which were 14 weeks old, healthy, similar body condition and lived in the similar grazed environment were selected randomly as experimental samples, the body measurements traits of Pingba gray goose were measured. The results showed that body weight, breast width, shank length, shank girth of male geese were significantly higher than female geese. Correlation analysis showed that there were no significant correlated between body slanting length and fossil bone length, shank girth and breast depth.Regression analysis between body measurements traits and body weight showed that the optimum regression equation was obtained as follows, Y=-787.718＋61.742X2＋94.298X4＋234.253X6, determination coefficients of model （R2） was 0.557, coefficients of estimate value of fossil bone length （X2）, breast width （X4） and shank girth （X6） reached a very significant level.