金娃娃萱草种子苗花茎高度变异与相关性状研究

Study on variation of flowering stalk height and its related traits in seed seedling of Hemerocallis hybridus Stella de Oro

对金娃娃萱草(Hemerocallis hybridus Stella de Oro)种子苗(群体)的花茎高度、单茎花朵数、叶片长度和开花日数的变异进行了研究。结果表明,单茎花朵数变异系数最大,花茎高度和叶片长度变异系数较大,开花日数变异系数最小,种子苗单茎花朵数与花茎高度明显超过母本金娃娃,通过广义遗传力计算看出,花茎高度、叶片长度和单茎花朵数的变异主要由遗传因素控制,开花日数的变异受环境因素影响较大;花茎高度与叶片长度和单茎花朵数之间存在高度相关;对种子苗进行聚类分析,共分为4个类群,从第1类到第4类花茎高度由高变矮,直至无花茎,单茎花朵数由多变少,最终无花朵;在每个类群中进行了相关性分析,第1类和第2类中,花茎高度与叶片长度呈显著相关,其余为负相关,从第1类至第4类花茎高度与单茎花朵数相关系数逐渐增大,由低度相关到高度相关。

The flowering stalk height,number of single stalk flowers,leaf length and the variation of flowering period of seed seedling in Hemerocallis hybridus Stella de Oro were studied.The results showed that the variation coefficient of number of single stalk flowers was the largest,the variation coefficient of flowering stalk height and leaf length were larger,and the coefficient of variation of flowering days was the smallest.The number of single stalk flowers and flowering stalk height of seed seedling were highly significantly more than their female parent.According to the calculation of the generalized heritability,the variation of flowering stalk height,number of single stalk flowers and leaf length were mainly controlled by genetic factors,the variation of flowering period mainly controlled by environmental factors.There was a high correlation between flowering stalk height,leaf length and the number of single stalk flowers.Cluster analysis was carried out on seed seedlings,which were divided into 4 groups,from the first group to the fourth group,the height of flower stalk changed from high to low,until there was no flower stalk.Correlation analysis was carried out in each group.In the first and second groups,there was a significant correlation between the height of flower stalk and leaf length,while the rest was negatively correlated.The correlation coefficient between flower stalk height and number of single-stalk flowers increased gradually from the first to the fourth groups,from low degree to high degree.