Chromosome study of the fern genus Cyrtomium (Dryopteridaceae)

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	Chromosome study of the fern genus Cyrtomium (Dryopteridaceae)
	Lu, JM; Cheng, X ; Wu, D ; Li, DZ
刊名	BOTANICAL JOURNAL OF THE LINNEAN SOCIETY
	2006-02-01
卷号	150 期号:2 页码:221-228
关键词	apogamy Balansana polyploidy
英文摘要	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.
学科主题	Plant Sciences
类目[WOS]	Plant Sciences
研究领域[WOS]	Plant Sciences
关键词[WOS]	PHANEROPHLEBIA DRYOPTERIDACEAE
收录类别	SCI
语种	英语
WOS记录号	WOS:000234919000007
公开日期	2012-06-12
内容类型	期刊论文
源URL	[http://ir.kib.ac.cn:8080/handle/151853/11207]
专题	昆明植物研究所_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
推荐引用方式 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.