干旱区生态环境知识资源中心(Arid): 额济纳湿地多枝柽柳种群的遗传多样性与遗传结构

Arid

	额济纳湿地多枝柽柳种群的遗传多样性与遗传结构
其他题名	Genetic Diversity and Genetic Structure of Tamarix ramosissima Populations in Ejina Wetlands
	张雅楠; 黄蕾; 张雷; 贾媛媛; 李佳彬; 党振华
来源期刊	西北植物学报
ISSN	1000-4025
出版年	2021
卷号	41 期号:7 页码:1000-4025
中文摘要	多枝柽柳(Tamarix ramosissima)是干旱区分布最广的柽柳属植物之一,可分布在沙荒地、干旱盐碱地和盐碱湿地等生境中,在维持特定生态系统稳定和保护植物种质资源多样性方面具有重要作用。该研究利用14个EST-SSR分子标记,分析了阿拉善额济纳湿地12个天然多枝柽柳种群(191个个体)的遗传多样性和遗传结构,为额济纳湿地多枝柽柳种质资源的管理、保护和利用提供理论依据。结果显示:(1)14个EST-SSR标记在191个多枝柽柳个体中共扩增出79个等位基因(N_a),平均每个基因座上的等位基因数为5.6,期望杂合度(H_e)平均为0.55,观测杂合度(H_o)平均为0.29,多态信息含量(PIC)平均为0.51,说明所调查种群的遗传变异信息丰富。(2) 12个多枝柽柳种群的平均多态位点比率为97.0%,平均Shannon's信息指数(I)为0.862,平均固定指数(F)为0.332,表明该地区多枝柽柳群体的遗传多样性较高。(3)种群内的近交系数(F_(is))为0.366,种群间的平均遗传分化系数(F_(st))为0.079,平均基因流(N_m)为4.425,表明所调查种群间的基因交流频繁,且种群内的遗传变异明显高于种群间。(4)在遗传结构上,12个多枝柽柳种群可分为4个亚群;种群间的遗传距离与地理距离无相关性(r= 0.194,P=0.120)。研究发现,所调查的多枝柽柳种群具有较丰富的遗传多样性,但它们均呈现出一定程度的杂合子不足及近交现象,对该地区多枝柽柳遗传多样性的长期维持构成了潜在不利影响。
英文摘要	Tamarix ramosissimais one of the most widely distributed Tamarixspecies in extremely arid areas.It can inhabit sandy wasteland,arid saline-alkali land,and saline-alkali wetland,etc.,and it plays an important role in maintaining the stability of a specific ecosystem and protecting the diversity of plant germplasm resources.In this study,by using 14EST-SSR markers,we analyzed the genetic diversity and genetic structure of 12 natural T.ramosissima populations(191 individuals)in the Ejina wetlands of the Alxa area.It provides a theoretical basis for the management,protection,and utilization of Tamarix germplasm resources in the region.The results showed that:(1)a total of 79 alleles(N_a)were amplified from 14EST-SSR markers.The average number of alleles per locus was 5.6,the average expected heterozygosity(H_e)was 0.55,the average observed heterozygosity(H_o)was 0.29,and the average polymorphism information content(PIC)was 0.51,indicating that the investigated populations had abundant information of genetic variation.(2)the average polymorphic loci ratio,the average Shannon's information index(I),and the average fixed index (F)of the 12 T.ramosissima populations were 97.0%,0.862,and 0.332,respectively,which indicated that the T.ramosissima populations in this area processed a high level of genetic diversity.(3)The mean inbreeding coefficient(F_(is))within the populations was 0.366,and the average genetic differentiation coefficient(F_(st))and gene flow(N_m)between the populations were 0.079 and 4.425,respectively.These results suggested that the genetic exchange between the populations existed widely,and the genetic variation within the investigated populations was significantly higher than that between populations.(4)The genetic structure analysis showed that the 12 T.ramosissima populations could be divided into four subpopulations,and the genetic distances between these populations were uncorrelated with their geographical distances(r=0.194,P=0.120).The present study identified that the investigated T.ramosissima populations had rich genetic diversity,while they all showed a certain degree of heterozygote deficiency and inbreeding,which had a potentially adverse effect on the long-term maintenance of genetic diversity of T.ramosissimain this area.
中文关键词	遗传多样性 ; 遗传结构 ; 基因流 ; 多枝柽柳
英文关键词	EST-SSR genetic diversity genetic structure gene flow EST-SSR Tamarix ramosissima
类型	Article
语种	中文
国家	中国
收录类别	CSCD
WOS类目	Genetics & Heredity
CSCD记录号	CSCD:7028074
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/365345
作者单位	张雅楠, 内蒙古大学生态与环境学院, 蒙古高原生态与资源利用教育部重点实验室;;内蒙古草地生态学重点实验室, 呼和浩特, 内蒙古 010021, 中国.; 黄蕾, 内蒙古大学生态与环境学院, 蒙古高原生态与资源利用教育部重点实验室;;内蒙古草地生态学重点实验室, 呼和浩特, 内蒙古 010021, 中国.; 贾媛媛, 内蒙古大学生态与环境学院, 蒙古高原生态与资源利用教育部重点实验室;;内蒙古草地生态学重点实验室, 呼和浩特, 内蒙古 010021, 中国.; 李佳彬, 内蒙古大学生态与环境学院, 蒙古高原生态与资源利用教育部重点实验室;;内蒙古草地生态学重点实验室, 呼和浩特, 内蒙古 010021, 中国.; 党振华, 内蒙古大学生态与环境学院, 蒙古高原生态与资源利用教育部重点实验室;;内蒙古草地生态学重点实验室, 呼和浩特, 内蒙古 010021, 中国.; 张雷, 内蒙古自治区林业科学研究院;;内蒙古大青山森林生态系统定位观测研究站, ;;内蒙古大青山森林生态系统定位观测研究站, 呼和浩特;;呼和浩特, ;; 010010;;010010.
推荐引用方式 GB/T 7714	张雅楠,黄蕾,张雷,等. 额济纳湿地多枝柽柳种群的遗传多样性与遗传结构[J],2021,41(7):1000-4025.
APA	张雅楠,黄蕾,张雷,贾媛媛,李佳彬,&党振华.(2021).额济纳湿地多枝柽柳种群的遗传多样性与遗传结构.西北植物学报,41(7),1000-4025.
MLA	张雅楠,et al."额济纳湿地多枝柽柳种群的遗传多样性与遗传结构".西北植物学报 41.7(2021):1000-4025.