品种区域试验中稳定性参数数量分类的改进方法

A Modification of The Quantitative Classification of Stability Parameters in Cultivar Regional Tests

此文建议以历届区试品CV值大样本中点值M′为总体正态分布原点,选用适宜小概率,导出标准差理论值S′后,再进行数量分类计算,作为对原法的改进方法。经此改进,既不出现负值,且覆盖面广;更加合理,适用,可进一步提高区试品仲评定分类的正确性。

The present paper proposed that the ' median' M' of large sample CV values from all yearly cultivar regional tests were taken as the origion point of the population normal distribution, by screening suitable little propability. derived out the theoritic value of standard deviation S'. then circulating quantitative classification. Using the modification, not only no negative values apear. but also broaden its cover regions, more reasonable and more suitable in application, further more, it could increase the correctness to evaluate cultivar's score in regional tests.