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植物研究 ›› 2023, Vol. 43 ›› Issue (1): 109-119.doi: 10.7525/j.issn.1673-5102.2023.01.012

• 分子生物学 • 上一篇    下一篇

丝兰属6种植物叶绿体基因组特征分析

王飞1,2, 赵文植1,2, 董章宏2, 马路遥1,2, 李卫英1,2, 李宗艳1, 辛培尧1,2()   

  1. 1.西南林业大学,国家林业和草原局西南风景园林工程技术研究中心,昆明 650224
    2.西南林业大学,西南地区生物多样性保育国家林业和草原局重点实验室,昆明 650224
  • 收稿日期:2022-06-13 出版日期:2023-01-20 发布日期:2022-12-23
  • 通讯作者: 辛培尧 E-mail:xpytgyx@163.com
  • 作者简介:王飞(1996—),男,硕士研究生,主要从事林木分子生物学与遗传改良研究。
  • 基金资助:
    科技部国家重点研发计划项目(2019FYD1001003)

Analysis of the Chloroplast Genome Characteristics of 6 Species of Yucca

Fei WANG1,2, Wenzhi ZHAO1,2, Zhanghong DONG2, Luyao MA1,2, Weiying LI1,2, Zongyan LI1, Peiyao XIN1,2()   

  1. 1.Southwest Research Center for Landscape Architecture Engineering State Forestry and Grassland Administration in Southwest Forestry University,Kunming 650224
    2.Key Laboratory of National Forestry and Grassland Administration on Biodiversity Conservation in Southwest China,Kunming 650224
  • Received:2022-06-13 Online:2023-01-20 Published:2022-12-23
  • Contact: Peiyao XIN E-mail:xpytgyx@163.com
  • About author:WANG Fei(1996—),male,postgraduate,forest tree molecular biology and genetic improvement research.
  • Supported by:
    National Key R&D Program of China(2019FYD1001003)

摘要:

为了理清丝兰属(Yucca)叶绿体基因组特征和序列变异情况,进行丝兰属植物叶绿体比较基因组学分析,并构建基于叶绿体基因组的系统发育树。利用高通量测序技术获得无刺龙舌兰(Y. treculeana)叶绿体基因组序列,结合丝兰属现已发表的叶绿体基因组,使用生物信息学方法对6种丝兰属植物叶绿体全基因组进行基本结构、重复序列、边界收缩与扩张以及序列变异分析等在内的比较基因组学研究,并进行系统发育分析。结果表明:6种丝兰属植物叶绿体基因组大小、基因的类型及数目相近,种间基因组结构比较保守;从丝兰属植物叶绿体基因组中检测到多条重复序列,其中SSR位点多是由单核苷酸、双核苷酸和四核苷酸组成,且偏好使用A、T碱基;根据核酸多态性指数π≥0.008,在6种丝兰属植物叶绿体基因组中筛选出了psbK-psbl-trnS-GCUrpl20-rps12ccsA-ndhD 3个高变异区域;基于叶绿体全基因组和LSC+SSC区序列构建的系统发育关系基本一致,确定了6种丝兰属植物间的系统发育关系,其中无刺龙舌兰与克雷塔罗丝兰(Y. queretaroensis)的亲缘关系最近。本研究测序获得了无刺龙舌兰叶绿体基因组,揭示了6种丝兰属植物叶绿体基因组特征和序列变异情况,明确了各物种间的亲缘关系,研究结果可为后续丝兰属植物分子标记开发及系统发育研究提供参考。

关键词: 丝兰属, 叶绿体基因组, 结构特征, 变异位点, 系统发育分析

Abstract:

In order to clarify the characteristics and sequences variation of the chloroplast genomeof Yucca, a comparative genomics of the chloroplasts was performed, and a phylogenetic tree based on the chloroplast genome was constructed. The chloroplast genome of Y. treculeana was obtained by high-throughput sequencing technology, and combined with the published chloroplast genome of Yucca, the chloroplast genomes of six species of Yucca were studied by comparative genomics, including basic structure, SSR, boundary contraction and expansion, sequence variation and phylogenetic analysis respectively. The results showed that the chloroplast genome size, gene type and number of the six Yucca species were similar, and the interspecific genome structure was conserved. Several repeated sequences were detected in the chloroplast genome of Yucca, among which SSR loci were mostly composed of mononucleotide, dinucleotide and tetranucleotide, and preferred A and T bases. Three regions with high variation(psbK-psbl-trnS-GCUrpl20-rps12 and ccsA-ndhD) were identified from the chloroplast genomes of six Yucca species according to the nucleic acid polymorphism index(π)≥0.008. The phylogenetic relationships constructed from the chloroplast genome and LSC+SSC region sequences were basically consistent, and the phylogenetic relationships among six Yucca species were confirmed, among which Y. treculeana and Y. queretaroensis were most closely related. The sequencing obtained Y. treculeana chloroplast genome, revealed the genome characteristics and sequence variation of six Yucca species, and clarified the relatedness among various species. The results could provide reference for subsequent molecular marker development and phylogenetic research.

Key words: Yucca, chloroplast genome, structural characteristics, locus of variation, phylogenetic analysis

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