不同择伐方式下云南松群体遗传多样性SSR分析  

Analysis of Genetic Diversity of Pinus yunnanensis Populations under Different Logging Methods

作　　者：许玉兰[1,2] 汪梦婷[2] 蔡年辉[1,2] 王亚楠[2] XU Yu-lan;WANG Meng-ting;CAI Nian-hui;WANG Ya-nan(Key Laboratory for Forest Genetic and Tree Improvement & Propagation in Universities of Yunnan Province, Southwest Forestry University, Yunnan Kunming 650224, China;Key Laboratory for Forest Resources Conservation and Utilization in the Southwest Mountains of China, Ministry of Education, Southwest Forestry University, Yunnan Kunming 650224, China)

机构地区：[1]西南林业大学云南省高校林木遗传改良与繁育重点实验室,云南昆明650224 [2]西南林业大学西南山地森林资源保育与利用教育部重点实验室,云南昆明650224

出　　处：《西南农业学报》2019年第7期1498-1502,共5页Southwest China Journal of Agricultural Sciences

基　　金：国家自然科学基金(31360189&31260191);云南省高校林木遗传改良与繁育重点实验室基金(YNGBT201702)

摘　　要：【目的】探讨不同择伐方式对云南松群体遗传多样性的影响。【方法】采用SSR分子标记技术分析云南松留优去劣、无人为择伐和伐优留劣3种方式的遗传多样性,比较遗传多样性的变异规律。【结果】云南松群体有效等位基因、Shannon′s信息指数和多态位点百分率分别为2.121、0.819和95.56%,云南松群体遗传多样性丰富。各群体间的遗传分化系数为0.012,遗传分化低,基因流高,变异主要来源于群体内,留优去劣群体的遗传多样性水平稍高于其他两类群体。【结论】不同择伐方式对云南松群体遗传多样性的影响不明显,生产中可对林分适度择伐,且保留优质木。[Objective] The effects of different cutting methods on the genetic diversity of Pinus yunnanensis populations were compared.[Method] Based on SSR molecular markers technique, the genetic diversity of P. yunnanensis under three cutting methods which were keep ing elite trees and logging inferior trees, no logging,keeping inferior trees and logging elite trees was studied.[Result] The results showed the effective alleles, Shannon's information index, and polymorphic loci of the P. yunnanensis populations were 2. 121,0. 819 and 95.56 %, respectively, indicating that the genetic diversity of P. yunnanensis was abundant. There were low coefficient of genetic differentiation (0.012) and high gene flow. The variation of P. yunnanensis populations mainly came from within populations. The genetic level of the population with keeping elite trees and logging inferior trees was significantly higher than that of the other two types.[Conclusion] There fore, The effect of the logging methods on the genetic diversity was little. In production, forest trees should be harvested moderately and high-quality wood should be retained.

关 键 词：云南松 择伐 遗传多样性 SSR标记 

分 类 号：S791[农业科学—林木遗传育种]