43种石斛属植物叶绿体基因组比较及系统发育关系研究  

Comparative Chloroplast Genomics and Phylogenetics of 43 Dendrobium Species

作　　者：朱涛 李蕾蕾 郭刘艳 叶延欣 李涛涛 陈艳艳 ZHU Tao;LI Leilei;GUO Liuyan;YE Yanxin;LI Taotao;CHEN Yanyan(College of Life Science and Engineering,Henan University of Urban Construction,Pingdingshan 476000,China;Nanli Village Town People’s Government,Xin’an County,Luoyang City,Xin’an 471800,China)

机构地区：[1]河南城建学院生命科学与工程学院,河南平顶山467000 [2]洛阳市新安县南李村镇人民政府,河南新安471800

出　　处：《信阳师范学院学报（自然科学版）》2023年第4期561-566,共6页Journal of Xinyang Normal University(Natural Science Edition)

基　　金：国家自然科学基金项目(32100272);河南省科技攻关项目(222102320077)。

摘　　要：基于美国国立生物技术信息中心(National Center of Biotechnology Information,NCBI)中下载的43种石斛的全叶绿体组序列,对43个物种间的亲缘关系进行研究。结果显示:(1)叶绿体基因的碱基组成显示T、C、A、G碱基平均含量分别是31.8%、19.0%、30.7%、18.5%;(2)通过遗传距离分析发现,铁皮石斛、黄石斛、始兴石斛和铁皮石斛中科院Ⅳ号的遗传距离最小,为0。说明这4种石斛在遗传上比较近,与其他种之间亲缘关系均较远。(3)系统发育关系显示石斛属植物是一个单系群,其中梳唇石斛是最先分化出来的,其次是竹枝石斛;细茎石斛、霍山石斛、广东石斛具有较近的亲缘关系。The phylogenetic relationships among 43 Dendrobium species are investigated based on complete chloroplast sequences obtained from the National Center of Biotechnology Information(NCBI).The findings reveal that:(1)The average base composition in chloroplast genes is as follows:T(31.8%),C(19.0%),A(30.7%),G(18.5%);(2)Genetic distance analysis demonstrates that Dendrobium officinale,Dendrobium tosaense,Dendrobium shixingense,and Dendrobium catenatum cultivar zhong keⅣexhibit the smallest genetic distance of 0,indicating their close genetic relationship compared to other species;(3)Phylogen analysis confirms that Dendrobium forms a monophyletic group with differentiation occurring first in Dectochilum followed by Dendrobium bambusculum.Additionally,there is a close relationship observed between Dendrobium tenuiculus,Dendrobium huoshanensis,and Dendrobium guangdongensis.

关 键 词：石斛属 叶绿体组 系统发育 遗传距离 

分 类 号：Q941[生物学—植物学]