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题名: Systematic significance of cytology in Cyananthus ( Campanulaceae) endemic to the Sino-Himalayan region
作者: Chen, Guang-Fu1; Sun, Wen-Guang1; Hong, De-Yuan2; Zhou, Zhuo3; Niu, Yang3; Nie, Ze-Long3; Sun Hang(孙航)3; Zhang, Jian-Wen3; Li, Zhi-Min1
刊名: JOURNAL OF SYSTEMATICS AND EVOLUTION
关键词: aneuploidy and polyploidy ; chromosomes ; cluster analysis ; Cyananthus ; evolution ; Himalayan-Hengduan Mountains
英文摘要: Chromosome numbers and the morphology of members of 24 populations representing 15 species of the Sino-Himalayan endemic genus Cyananthus (Campanulaceae) were studied using karyological and numerical taxonomic techniques. The chromosome numbers of these taxa are 2n=10, 12, 14, 24, 28, and the basic chromosome numbers for the genus are x=5, 6, 7. All species except C. inflatus Hook. f. & Thoms. and C. microphyllus Edgew. were examined for the first time and a new ploidy level (tetraploidy) is reported in the genus. Chromosome measurement data were analyzed using cluster analysis. The relationships between three sections within Cyananthus and evolutionary trends within the genus are discussed in the light of karyological data. The cytological data suggest that Cyananthus is a relatively primitive genus in Campanulaceae and there is significant division within the genus, and polyploidization may have played an important role in the chromosome evolution and speciation of Cyananthus in the Himalayan-Hengduan Mountains.
出版日期: 2014-05-01
卷号: 52, 期号:3, 页码:260-270
DOI标识: 10.1111/jse.12095
语种: 英语
收录类别: SCI
学科分类: Plant Sciences
ISSN号: 1674-4918
Citation statistics:
内容类型: 期刊论文
URI标识: http://ir.kib.ac.cn/handle/151853/18133
Appears in Collections:中国科学院东亚植物多样性与生物地理学重点实验室_期刊论文

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作者单位: 1.Yunnan Normal Univ, Sch Life Sci, Kunming 650500, Peoples R China
2.Chinese Acad Sci, Inst Bot, State Key Lab Systemat & Evolutionary Bot, Beijing 100093, Peoples R China
3.Chinese Acad Sci, Kunming Inst Bot, Key Lab Plant Divers & Biogeog East Asia, Kunming 650201, Peoples R China

Recommended Citation:
Chen,Guang-Fu;Sun,Wen-Guang;Hong,De-Yuan;Zhou,Zhuo;Niu,Yang;Nie,Ze-Long;Sun,Hang;Zhang,Jian-Wen;Li,Zhi-Min.Systematic significance of cytology in Cyananthus ( Campanulaceae) endemic to the Sino-Himalayan region,JOURNAL OF SYSTEMATICS AND EVOLUTION,2014,52(3):260-270
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