热带亚热带植物学报2026，Vol.34Issue(2)：185-195,11.DOI:10.11926/jtsb.4989
广东阳春市猪血木不同居群种实表型性状变异及萌发特征研究
Phenotypic Variations in Seed and Fruit Traits and Germination Characteristics of the Wild and Cultivated Populations of Euryodendron excelsum in Yangchun,Guangdong
摘要
Abstract
To clarify the variation and patterns of seed and fruit phenotypes and germination traits among extremely small populations of the endangered plant Euryodendron excelsum,and to identify phenotypic traits affecting germination rate,and select superior germplasm,the reproductive traits and seed germination rate of 6 populations of E.excelsum in Yangchun City,Guangdong Province were studied using field survey and laboratory analyses.The results showed that there were significant differences in 7 seed and fruit phenotypic traits and germination rate among populations(P<0.05),with an average coefficient of variation of 32.18%.The variation degree of seed traits was more abundant than that of fruit traits.The diameter,length,size index and 100-fruit weight of fruit were main indicators for evaluating populations.Wild populations generally exhibited greater variation than artificial ones.The overall mean germination rate was 32.2%,indicating low seed vigor.In wild populations,germination rate positively with diameter,length,size index,and 100-fruit weight,and negatively correlated with fruit shape index(P<0.05);while there was no significant correlations among the traits in artificial populations.The six populations could be clustered into two categories according to their origin type and geographical location:wild populations and artificial populations.Among them,the seed and fruit traits of artificial populations were generally better than those of wild populations.Among the artificial populations,the population of E'huangzhang had the best seed and fruit traits,and among the wild populations,the population of middle Bajia had the best seed and fruit traits and the highest germination rate.There was rich variation in seed and fruit phenotypes among the populations of E.excelsum.The seed germination rate of wild populations was significantly correlated with seed and fruit phenotypes.The population of middle Bajia should be the key population for protection and utilization.关键词
猪血木/极小种群植物/濒危植物/种实性状/表型多样性/发芽Key words
Euryodendron excelsum/Extremely small population plant/Endangered plant/Seed and fruit trait/Phenotypic variation/Germination引用本文复制引用
李盈莹,杨锦昌,袁在翔,邱祖械,徐翊,李荣生,董明亮..广东阳春市猪血木不同居群种实表型性状变异及萌发特征研究[J].热带亚热带植物学报,2026,34(2):185-195,11.基金项目
林木种质资源调查项目(GDZZDC20228702) （GDZZDC20228702）
中央预算内投资计划项目(粤林函[2022]250)资助 This work was supported by the Project for Forest Germplasm Resources Investigation(Grant No.GDZZDC20228702),and the Project of Central Budget Investment Plan(Grant No.Yuelinhan[2022]250). （粤林函[2022]250）
