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园艺学报 ›› 2011, Vol. 38 ›› Issue (12): 2387-2394.

• 研究报告 • 上一篇    下一篇

应用核DNA ITS序列探讨广义花楸属(Sorbus L.)属下系统关系

王国勋1,2,张明理1,3,*   

  1. (1中国科学院植物研究所标本馆,北京 100093;2中国科学院研究生院,北京 100039;3中国科学院干旱区生物地理与生物资源重点实验室,中国科学院新疆生态与地理研究所,乌鲁木齐 830011)
  • 收稿日期:2011-08-12 修回日期:2011-11-16 出版日期:2011-12-25 发布日期:2011-12-25
  • 通讯作者: 张明理

A Molecular Phylogeny of Sorbus(Rosaceae)Based on ITS Sequence

WANG Guo-xun1,2 and ZHANG Ming-li1,3,*   

  1. (1Institute of Botany,Chinese Academy of Sciences,Beijing 100093,China;2Graduate University of Chinese Academy of Sciences,Beijing 100039,China;3Key Laboratory of Biogeography and Bioresource in Arid Land,Xinjiang Institute of Ecology and Geography,Chinese Academy of Sciences,Urumqi 830011,China)
  • Received:2011-08-12 Revised:2011-11-16 Online:2011-12-25 Published:2011-12-25
  • Contact: ZHANG Ming-li

摘要: 花楸属属内杂交和多倍化现象比较普遍,分类处理一直存在争议。选取核基因的ITS序列对花楸属(Sorbus L.)的46个种进行测序,并选取栒子属(Cotoneaster multiforus,Cotoneaster horizontalis)、白鹃梅属(Exochorda racemosa)、蔷薇属(Rosa hugonis)和樱属(Cerasus glandulosa)作为外类群,基于最大简约分析(Maximum parsimony analysis,MP),最大似然分析(Maximum likelihood analysis,ML)和贝叶斯推断(Bayesian inference,BI)对花楸属进行分子系统发育重建。结果表明:花楸属为自然的单系类群,并且得到很高的支持率;Aria、Micromeles和Sorbus,3个亚属各自不能形成单系,甚至单叶类群和复叶类群的分类学界限都不是很清楚,这说明目前的分子系统发育证据与花楸属属内的分类划分并不十分吻合。

关键词: 花楸属, 系统发育, ITS

Abstract: The systematic circumscription of Sorbus has remained unresolved because of hybridization and polyploidy. To reconstruct the phylogeny of Sorbus,we sequenced the nuclear ribosomal DNA ITS region of 46 species of the genus and outgroups species Cotoneaster multiforus,Cotoneaster horizontalis,Exochorda racemosa,Rosa hugonis and Cerasus glandulosa. The phylogenetic relationships among 43 species of Sorbus were investigated by means of maximum parsimony(MP),maximum likelihood(ML)and bayesian inference(BI)analyses. The results revealed that the genus Sorbus is monophyletic;Subg. Aria,Subg. Micromeles and Subg. Sorbus were not monophyletic,respectively;The circumscription between unifoliate group and multifoliate group is unclear. The results are not in accordance with the previous morphological classification.

Key words: Sorbus L., phylogeny, ITS

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