檫木家系生长、叶色遗传变异及优良家系选择

The family growth condition,heredity variation of leaf pigments and excellent family selection for Sassafras tsumu

以檫木半同胞家系为材料,揭示家系苗期生长、叶片颜色和叶片色素等主要性状变异规律,并利用层次分析方法对其进行综合评价。研究结果表明,檫木生长性状中的叶量、苗高、基径和分枝数,叶片颜色中的叶色a^*值、叶色b^*值和叶色L值在家系间具有显著的差异;以上7个性状受中度以上的遗传力控制。叶片花色素苷含量、类胡萝卜素含量和叶绿素含量在家系间差异不显著,并且具有较低的广义遗传力,说明这3个性状受环境影响较大。通过层次分析法对檫木家系进行综合评价,筛选出苗期表现比较优异的家系。檫木家系间生长和叶色性状遗传变异丰富,遗传改良潜力较大,并筛选出来自浙江和安徽的3个优良家系。

In order to select the excellent families of Sassafras tsumu,genetic variation of growth,leaf color and leaf pigment between families were investigated.Genetic variation of main traits was analyzed and evaluation of all families was conducted by using analytic hierarchy process(AHP).The results showed that there were significant differences in aspect of seven traits,including leaf number,seedling height,diameter at base height,branches,a^*,b^*and L among different families.This indicated that these seven traits have a huge potential for improvement.The broad heritability of these seven traits were above 0.65.This suggested that these traits were mainly controlled by genetic factors instead of environmental factors.No significant differences were found in chlorophyll,carotenoid and anthocyanin contents between different families.The broad heritability of these three traits were low,that indicated these three traits were mainling controlled by environment.Genetic variation of growth and leaf color was rich between all families.Three superior families from Zhejiang and Anhui province were selected for popularization.