广西林业科学2025，Vol.54Issue(5)：471-480,10.DOI:10.19692/j.issn.1006-1126.20250501
濒危植物元宝山冷杉不同龄级遗传多样性评估
Genetic Diversity Assessments of Endangered Plant Abies yuanbaoshanensis at Different Age Classes
摘要
Abstract
In order to explore change rule of genetic diversity on time scale of endangered plant Abies yuan-baoshanensis and provide basis for formulation of conservation strategies and rational utilization of resources,SSR molecular marker was used to analyze genetic diversities and genetic structures of A.yuanbaoshanensis wild groups at different age classes(seedling,small tree,middle tree and old tree).Results showed that a total of 25 alleles were detected by six pairs of primers,and average Na,Ne,I,Ho,He and PIC were 4.167,2.129,0.854,0.468,0.494 and 0.493 respectively.A.yuanbaoshanensis groups at four age classes showed low degrees of ge-netic diversity.Old tree group had the highest genetic diversity,and seedling group had the lowest genetic diver-sity.Population showed significant decrease trend.Among groups at four age classes,there were moderate ge-netic differentiation(Fst=0.105)and frequent gene exchange(Nm>1.000).AMOVA results showed that genetic variation in A.yuanbaoshanensis population mainly derived from groups within age classes(91%).Isolated dis-tribution might be main reason for endangered status of A.yuanbaoshanensis.Combination of in situ protection and artificial breeding should be taken to protect genetic diversity of A.yuanbaoshanensis and alleviate its en-dangered status.关键词
遗传多样性/SSR/濒危植物/元宝山冷杉Key words
genetic diversity/SSR/endangered plant/Abies yuanbaoshanensis分类
农业科技引用本文复制引用
卢勇,韦金鑫,唐健民,韦玉赏,杨宇萍,刘世男,丁涛..濒危植物元宝山冷杉不同龄级遗传多样性评估[J].广西林业科学,2025,54(5):471-480,10.基金项目
广西自然科学基金项目(2025GXNSFAA069161) （2025GXNSFAA069161）
广西植物研究所学科发展基金项目(桂植发030) （桂植发030）
广西林业科技推广示范项目(桂林科字[2022]GT23) （桂林科字[2022]GT23）
