摘要
利用基因组SSR技术,研究广东湛江竹节树自然种群的遗传结构、遗传分化、基因流和小尺度空间遗传结构特征。结果表明:(1)竹节树种群遗传多样性较高,有效等位基因数Na=9.285、期望杂合度He=0.607、Shanoon′s多样性指数I=1.437;但种群杂合子缺失较严重,显著偏离Hardy-Weinberg平衡。(2)亚种群间Fst在0.088~0.181范围内,整体Fst=0.130,竹节树种群遗传分化较为显著。(3)竹节树种群有较大的花粉流及种子流,分别为131.78 m(50.13~186.36 m)和289.64 m。(4)竹节树种群空间遗传结构系数Sp为0.041,在4.4~7.0 m内有显著空间遗传结构。说明该种群尚处于健康和稳定的状态。
Based on SSR sites,we study the genetic structure,breeding system,gene flow and Finescale Spatial Genetic Structure of a natural Carallia brachiata population.The results show that:(1)The genetic diversity of the population is at a high level,Na=9.285,He=0.607 and I=1.437.The lack of heterozygosity is serious,and it deviates significantly from the Hardy-Weinberg equilibrium.(2)Fst between each subpopulation ranges from 0.088 to 0.181 with a total Fst of 0.130 in this population.In general,the population has a large genetic variation.(3)The pollen flow(131.78 m)and seed flow(289.64 m)of the population are large.(4)The genetic structure coefficient Sp of the population is 0.041,and there is a significant spatial genetic structure in the range of 4.4 m and 7.0 m.
作者
郑志翰
肖兰
杨盛昌
ZHENG Zhihan;XIAO Lan;YANG Shengchang(College of Environment&Ecology,Xiamen University,Xiamen 361102,Fujian,China;Island Research Center,Ministry of Natural Resources of the PRC,Pingtan 350400,Fujian,China)
出处
《福建林业科技》
2020年第3期1-7,共7页
Journal of Fujian Forestry Science and Technology
基金
国家科技部重点研发专项(红树林等典型滨海湿地生态恢复和生态功能提升技术研究与示范项目之课题三:特殊生境的红树林恢复,2017YFC0506103)
国家海洋局海洋公益性行业科研项目(201305021)。
关键词
竹节树
遗传结构
遗传分化
基因流
精细空间遗传结构
Carallia brachiate
genetic structure
genetic divergence
gene flow
finescale spatial genetic structure(FSGS)