安格斯牛×秦川牛F1代产量分级模型的研究

doi:10.16431/j.cnki.1671-7236.2016.04.018

摘要/Abstract

摘要： 本研究旨在对中长期育肥的安格斯牛×秦川牛F1代的胴体性状指标进行筛选并建立其产量分级模型。随机选取115头发育正常、健康无病的育肥牛屠宰后测定胴体性状指标,采用相关分析和因子分析对其进行筛选并建立产肉率预测模型。结果表明,胴体重、后躯部位肉重、眼肌面积、背膘厚是胴体产量分级的重要指标;将其与产肉率进行多元线性回归,得到胴体产量分级模型,产肉率(%)=41.372-0.046×胴体重+0.403×后躯部位肉重-0.049×眼肌面积+0.334×背膘厚(R²=0.850),经回归诊断和t检验证明该模型预测结果良好,预测值和实测值间差异不显著。结果提示,建立的产量分级模型可用于安格斯牛×秦川牛F1代产量的预测,为开展雪花牛胴体分级提供科学依据。

关键词: 雪花牛; 胴体性状; 产量分级; 分级模型

Abstract: The experiment was conducted to screen the carcass traits of hybrid F1 of Angus×Qinchuan cattle and establish the yield model.115 Angus×Qinchuan F1 cattles were randomly selected and the carcass traits were measured to screen and establish the yield model.Correlation analysis and multivariate factor analysis were used to decompose the correlation matrix of carcass measurement traits of crossed-bred cattles.The results showed that carcass weight, hindquarter cut, loin eye area and backfat thickness were important yield indexes.The model was set up by matching them to meat production percentage with multivariate linear regression:Meat production percentage(%)=41.372-0.046×carcass weight+0.403×hindquarter cut -0.049×loin eye area+0.334×backfat thickness (R²=0.850).The model was proved to be accurate after the regression diagnostics and t test with no significant differences between predicted values and measure values.These results indicated that the model could be used to predict the meat yield of hybrid F1 of Angus×Qinchuan cattle and provide technical support to carry out the carcass grading of snowflake cattle.

Key words: snowflake cattle; carcass traits; yield classification; classification model

中图分类号:

S823.8⁺1

李敬, 郎玉苗, 张丽, 孙宝忠, 谢鹏, 李海鹏. 安格斯牛×秦川牛F1代产量分级模型的研究[J]. , 2016, 43(4): 973-979.

LI Jing, LANG Yu-miao, ZHANG Li, SUN Bao-zhong, XIE Peng, LI Hai-peng. Study on the Yield Grade Model of Hybrid F1 of Angus×Qinchuan Cattle[J]. , 2016, 43(4): 973-979.

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