和田青驴体质量和体尺相关性的R语言分析

和田青驴是新疆优良地方驴品种,针对和田青驴存栏量不断减少急需加快保种、选育和提纯复壮速度的现状,以新疆和田地区皮山县的和田青驴为研究对象,测定和田青驴的体质量和主要体尺指标,应用R语言(2.14.2)分析它们的相关性,并建立最优的回归模型。结果表明:年龄(特别是6月龄～1岁年龄)对和田青驴的体质量和体尺性状(不含管围)影响极显著(P<0.001);体质量与体尺性状间存在极显著的相关关系(P<0.001),其中体质量与胸围的相关系数最高(r=0.97),对和田青驴体质量其决定作用的是胸围,其次是体高和体长,管围对体质量的影响最小。应用R语言的线性和回归模型确定和田青驴体质量和体尺的最优回归模型为:Y=1.47X1+3.04X3-339.77。总之和田青驴在保种、选育和提纯复壮时应以胸围为主兼顾体高和体长,同时参考最优回归模型可以得到好的效果。

Correlation Analysis between Body Weight and Body Size of Hetian Qing Donkey by R Project

Hetian Qing donkey is a good local donkey breed in Xinjiang.In order to make some suggestion for conservation,development and breeding selection of the decreased Hetian Qing donkey,body weight and body size of Hetian Qing donkey distributed in Pishan County of Hetian in Xinjiang were measured and multi-analyzed by R project(2.14.2).The results showed that ages(especially for 6-month to 1-year old) had highly significant effect(P<0.001) in body weight and body size except for the circumference of cannon bone.The relationship between body weight and size were highly significant(P<0.001),especially the correlation coefficient between weight and heart girth(r=0.97) was the highest in all.The most decisive role in body weight was heart girth,then height at wither,body length and circumference of cannon bone in sequence.The best regression model was Y=1.47X1+3.04X3-339.77 by the linear equation and regression equation in R 2.14.2.The conclusions were that priority should be given to heart girth,and the height at wither and body length should be taken into consideration.Meanwhile the optimal regression model should be taken for reference when conserving,breeding and reproducing Hetian Qing donkey.