水稻新品种DUS测试数量性状特异性统计分析判别研究

Study on the Statistical Assessment of Distinctness of Quantitative Characteristics in DUS Testing of the New Rice Varieties

对3个申请品种与其近似品种的10个主要数量性状连续2年的测试数据进行统计分析,结果表明:申请品种与其近似品种在指南中处于不同分级范围的数量性状,如果该性状均值相差相对较小,可能实际没有差异;申请品种与其近似品种在指南中处于同一个分级范围的数量性状,如果该性状均值相差相对较大,有可能存在显著差异;数量性状特异性统计分析判别是除指南判别以外的重要判别依据.

Ten main quantitative characteristics of 3 candidate varieties and their similar ones were statistically analysed in 2 continuous years. If the quantitative characteristic of the candidate variety and its similar one is too close, there may actually be no distinctness on the quantitative characteristic, while the classifications of the characteristic of the two varieties are different in DUS test guideline. However, if the difference of the average value of the quantitative characteristic between the candidate variety and its similar one is comparatively big, there may be significant distinctness on the quantitative characteristic, while the classifications of the quantitative characteristics of the two varieties are the same in DUS test guideline. Besides the criteria of DUS test guideline, statistical analysis should be an important method to assess the distinctness of the quantitative characteristics of new rice varieties.