基于SSR标记的不同优势等级云南松遗传多样性分析

doi:10.7525/j.issn.1673-5102.2019.01.011

摘要/Abstract

摘要： 基于SSR分子标记技术，按树高和胸径（地径）因子将样地内的植株分为优势木、中等木和劣势木3类，对不同生长优势等级云南松林木的遗传多样性变异特征进行了研究。结果表明：在林冠层，优势木的有效等位基因数、Shannon's信息指数、观测杂合度和期望杂合度分别为2.083、0.762、0.290和0.423，略高于中等木和劣势木；在更新层，有效等位基因数、Shannon's信息指数、观测杂合度和期望杂合度分别为2.063、0.774、0.272和0.410，除观测杂合度外，其余3个指标也均表现为优势木略高于中等木和劣势木。从差异显著性检验来看，不同生长优势等级云南松林木间的遗传多样性差异不显著，即林木生长分化对遗传多样性的影响不明显。

关键词: 优势等级, 遗传多样性, 云南松

Abstract: The trees were divided into the dominant trees, the intermediate trees and the suppressed trees according to the height and diameter(ground diameter) parameters. The variation of genetic diversity characteristics in different dominance hierarchies of Pinus yunnanensis Franch. population was studied by SSR molecular markers. In forest canopy layer, the mean number of effective alleles, Shannon's information index, observed heterozygosity and expected heterozygosity of dominant trees were 2.083, 0.762, 0.290 and 0.423, respectively, for the dominant trees, which slightly exceeded the intermediate and suppressed trees. In regeneration layer mean number of effective alleles, Shannon's information index, observed heterozygosity and expected heterozygosity were 2.063, 0.774, 0.272 and 0.410, respectively, for the dominant tree, which slightly exceeded the intermediate and suppressed trees except for observed heterozygosity. There were no significant differences among the different dominance hierarchy trees for the genetic diversity by the difference significance test of statistics method.

Key words: dominance hierarchy, genetic diversity, Pinus yunnanensis Franch

中图分类号:

S791.257

蔡年辉, 许玉兰, 王亚楠, 陈诗, 汪梦婷, 李根前. 基于SSR标记的不同优势等级云南松遗传多样性分析[J]. 植物研究, 2019, 39(1): 87-95.

CAI Nian-Hui, XU Yu-Lan, WANG Ya-Nan, CHEN Shi, WANG Meng-Ting, LI Gen-Qian. Genetic Diversity Characteristics in Different Dominance Hierarchies of Pinus yunnanensis Franch. Trees[J]. Bulletin of Botanical Research, 2019, 39(1): 87-95.

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