摘要
据线性模型原理,提出了利用协变量改进作物新品种性状表现方差估计的方法,指出了方差估计效果评价的指标,在此基础上,分析讨论了利用协变量改进作物新品种性状表现方差估计的可能性及其条件。最后分析了陕西省关中灌区小麦区域试验产量资料。
According to the linear model concept,this paper proposed the method for improving the variance estimate of the new crop variety performances by using a covariate.The norm for assessing usefulness of different estimators is pointed out.Then the possibility and the condition for improvement of the variance estimate of the new crop variety performances by using a covariate are theoretically discussed.As an application example,the yield data from regional wheat trial in irrigation area of Middle Shaanxi are analyzed.
出处
《西北农林科技大学学报（自然科学版）》
CSCD
北大核心
2005年第3期48-52,共5页
Journal of Northwest A&F University(Natural Science Edition)
基金
国家863计划项目(2001AA241037)
关键词
品种稳定性
方差估计
协变鞋
均方误
variety stability
variance estimation
covariate
mean square error
