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Chromosome study of the fern genus Cyrtomium (Dryopteridaceae)
Lu, JM; Cheng, X; Wu, D; Li, DZ
2006-02-01
发表期刊BOTANICAL JOURNAL OF THE LINNEAN SOCIETY
卷号150期号:2页码:221-228
摘要Cyrtomium (Dryopteridaceae) is an Asiatic genus comprising about 40 species characterized by having anastomosing veins that form areolae with included veinlets. Twelve chromosome counts representing 11 taxa were made in the present study. The chromosome numbers of six species endemic to China are reported for the first time: C. uniseriale, 2n = 164; C. guizhouense, 2n = 82; C. shingianum, n = 82, 2n = c.164; C. chingianum, 2n = 164; C. urophyllum, 2n = 82 and C. aequibasis, 2n = 123. The results were used to show that (1) C. uniseriale should be reduced to varietal status under C. balansae; (2) subseries Balansana is not closely related to any other Cyrtomium species and should be separated from Cyrtomium; and (3) C. guizhouense and C. lonchitoides are basal groups when subseries Balansana is not considered. These results were also supported by morphology. A high level of differentiation is a distinct characteristic in Cyrtomium. The genus has two reproductive types: sexual and apogamous. Sexual species are distributed mostly in China. Southwestern China is a modern diversity centre of Cyrtomium, with 80.6% of known species occurring there. Many species are endemic, most of which are sexual tetraploids or apogamous triploids. Both the apogamous reproductive type and polyploid species are adaptions to limestone habitats. (c) 2006 The Linnean Society of London.
关键词Apogamy Balansana Polyploidy
学科领域Plant Sciences
收录类别SCI
语种英语
WOS研究方向Plant Sciences
WOS类目Plant Sciences
WOS记录号WOS:000234919000007
引用统计
被引频次:7[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://ir.kib.ac.cn/handle/151853/11207
专题中国西南野生生物种质资源库
作者单位1.Chinese Acad Sci, Kunming Inst Bot, Lab Plant Biogeog & Biodivers, Kunming 650204, Yunnan, Peoples R China
2.Chinese Acad Sci, Grad Sch, Beijing 100039, Peoples R China
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GB/T 7714
Lu, JM,Cheng, X,Wu, D,et al. Chromosome study of the fern genus Cyrtomium (Dryopteridaceae)[J]. BOTANICAL JOURNAL OF THE LINNEAN SOCIETY,2006,150(2):221-228.
APA Lu, JM,Cheng, X,Wu, D,&Li, DZ.(2006).Chromosome study of the fern genus Cyrtomium (Dryopteridaceae).BOTANICAL JOURNAL OF THE LINNEAN SOCIETY,150(2),221-228.
MLA Lu, JM,et al."Chromosome study of the fern genus Cyrtomium (Dryopteridaceae)".BOTANICAL JOURNAL OF THE LINNEAN SOCIETY 150.2(2006):221-228.
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