唐菖蒲品种的特异性、一致性和稳定性研究

Study on Distincness,Uniformity and Stability of Gladiolus Cultivars

为制定科学、合理的唐菖蒲 DUS测试指南 ,对国内主栽的 2 1个夏花型唐菖蒲品种的 8个定性二元性状、4 7个定性多态性状和 2 4个数量性状进行了田间观测。经变异系数、t检验、系统聚类法等进行分析显示 ,各品种的定性二元性状和大部分定性多态性状的一致性表现较好 ,而数量性状因受环境影响一致性差 ;定性二元性状稳定性较好 ,数量性状最差。经分析共筛选出 4 2个表现好的性状、2 6个较差的性状和 11个很差的性状。 4 2个表现好的性状可用于品种特异性比较 ,能正确、有效地区分

Eight qualitative binary characters, 47 qualitative polymorphic characters and 24 quantitative characters of 21 main gladiolus cultivars were observed on the field, in order to setup a scientific and reasonable DUS test guide. Uniformity, stability and distinctness of these characters were analyzed by using coefficient of variation, t test, and systematic cluster analysis. Results showed that the uniformity of all qualitative binary characters and most of qualitative polymorphic ones were good for all cultivars, while the quantitative ones were influenced by the environment significantly and their uniformity were bad. The stability of the qualitative binary characters were relatively good, while those quantitative ones were the worst. On the basis of uniformity and stability, we screened out 42 good characters, 26 relatively poor ones and 11 bad ones. And the first catesory of characters can be better used for comparing distinctness of cultivars, distinguishing one DUS test cultivar from another correctly and efficiently.