湖南生态科学学报2026，Vol.13Issue(2)：1-6,6.DOI:10.3969/j.issn.2095-7300.2026.02.001
付家林场樟子松种质资源表型多样性评价
Phenotypic Diversity Evaluation of Pinus sylvestris var.mongolica Germplasm Resources in Fujia Mechanized Forest Farm
摘要
Abstract
[Objective]To reveal the phenotypic differentiation degree and variation patterns among different provenances of Pinus sylvestris var.mongolica.[Method]A total of 74 germplasm resources from four provenances at the Superior Seed Base of the Fujia Mechanized Forest Farm in Changtu County were studied.Genetic diversity and genetic differentiation of seven phenotypic traits,including twig,needle,and sheath characteristics,were investigated.[Result]Significant differences were observed for the seven phenotypic traits both within and among populations,indicating abundant overall genetic variation.The phenotypic variation coefficient ranged from 1.97％to 18.93％(mean 10.42％),and the diversity index ranged from 1.95 to 2.04(mean 1.99).The degree of variation for the traits,in descending or-der,was:twig width>needle width>needle length>twig length>needle thickness>sheath width>sheath length.The mean phenotypic differentiation coefficient(Vst)among provenances was 51.50％,indicating comparable levels of variation within and among populations.Specifically,among-provenance variation was relatively large for needle length and sheath width,accounting for 83.50％and 84.38％of the total variation,respectively.Among-provenance variation for needle width(68.75％of total varia-tion)was also greater than within-provenance variation.Variation in the other phenotypic traits was pri-marily derived from within-provenance sources.[Conclusion]Phenotypic variation among different prove-nances of Pinus sylvestris var.mongolica is abundant.Some traits(e.g.,needle length,sheath width,needle width)exhibit variation primarily among provenances,while most traits are dominated by within-provenance variation.These findings provide a scientific basis for the efficient utilization and genetic im-provement of Pinus sylvestris var.mongolica germplasm resources.关键词
樟子松/付家机械林场/种质资源/表型多样性Key words
Pinus sylvestris var.mongolica/Fujia Mechanized Forest Farm/germplasm resources/phenotypic diversity分类
农业科技引用本文复制引用
宋健..付家林场樟子松种质资源表型多样性评价[J].湖南生态科学学报,2026,13(2):1-6,6.基金项目
国家科技部基础平台建设项目(2005DKA21003),横向课题《基于SSR分子标记的樟子松种子园遗传多样性和亲缘关系鉴定》(H2023127) （2005DKA21003）
