四川农业大学学报2025，Vol.43Issue(2)：365-374,10.DOI:10.16036/j.issn.1000-2650.202411508
光叶水青冈种实表型变异及其环境解释
Phenotypic Variations in Fruit and Seed Traits of Fagus lucida Populations and Its Environmental Interpretation
摘要
Abstract
[Objective]Fagus lucida is a multi-purpose tree species worth developing in the middle mountain area of subtropical region.In order to provides reference for resource protection,utilization and selective breeding,the phenotypic diversity in fruit and seed traits of F.lucida populations in different habitats was analyzed.[Method]The phenotypic variation of 14 fruit and seed traits from 6 natural popu-lations in Sichuan and Zhejiang provinces were studied,the variation The variation degree and regularity were analyzed by nested variance and canonical correlation analysis.[Result]①Most of the fruit and seed phenotypic traits showed significant variation within and among populations,but CT,NLD,ST,SSW and STD did not differ significantly among populations.The weight(CW)and size(PL and CB)of cupule in the Sichuan populations were significantly larger than those in the Zhejiang populations,and the nuts in the Nanjiang population were significantly larger and heavier than those in other populations.②The mean coefficient of variation(C.V.)and the mean value of relative range(R')were 15.85%and 18.47%,respectively,the variation range and dispersion degree of weight traits such as CW,SNW,SW and SSW were higher than the average,indicating that the yield performance was not stable.The coeffi-cient of variation and relative range of Nanjiang,Qingyuan and Yunhe 3 populations were all above 18%and 20%,indicating the phenotypic variation of these populations was rich and the trait stability was slightly poor.③The phenotypic differentiation coefficient between populations was 18.14%,the variation coefficient of each index was 1.28%-85.71%,and the differentiation coefficient of fruit and seed traits was<50%except for SW,which showed the diversity of intrapopulation was greater than that of interpopu-lation,and the intrapopulation variation was the main source of phenotypic variation.④The Shannon-Wiener diversity index ranged from 0.806 to 1.332,the average value was 0.954,and the diversity index of ST was the highest,while the SLD was the smallest.The diversity indices of the three populations in Si-chuan were all above 1.0,with high genetic diversity and stable character distribution.⑤The appearance quality of cupule and nut was significantly and positively correlated with seed weight and size,which could effectively reflect the seed quality;the positive effect of altitude on fruit and seed was greater than that of geographic latitude and longitude,while the average annual temperature was significantly and negatively correlated with most fruit and seed traits.As the altitude increasing and the temperature de-creasing,the fruit and seeds gradually grew larger and heavier.[Conclusion]The phenotypic diversity of F.lucida was abundant,and the size of cupule and nut could better predict seed traits.In the future,Sichuan could be chosen as the key area for seed collection and diversity conservation,because the fruit and seeds here are larger and heavier.关键词
光叶水青冈/天然种群/种实性状/表型变异Key words
Fagus lucida/natural population/fruit and seed traits/phenotypic variation分类
农业科技引用本文复制引用
念欣彤,严俊伟,龚志鸿,陈小红..光叶水青冈种实表型变异及其环境解释[J].四川农业大学学报,2025,43(2):365-374,10.基金项目
橡树种质资源收集评价与创新利用(2024YFNH0028). （2024YFNH0028）
