Cytotaxonomic study of genus Hymenasplenium (Aspleniaceae) in Xishuangbanna, southwestern China

	Cytotaxonomic study of genus Hymenasplenium (Aspleniaceae) in Xishuangbanna, southwestern China
	Cheng, X ; Murakami, N
	1998-12-01
发表期刊	JOURNAL OF PLANT RESEARCH
ISSN	0918-9440
卷号	111 期号:1104 页码:495-500
摘要	The gametic chromosome numbers of seven Hymena-splenium (Aspleniaceae) species from Xishuangbanna, Yunnan Prov., China, were investigated. All the examined individuals of H.obscorum, H.cheilosorum and H. latipinnum were sexual diploids with n = 39 chromosomes. Intraspecific cytological variation was found in H. excisum, which has a sexual diploid (n = 39) and a tetraploid (n = 78). Only a triploid apogamous cytotype (n = ca. 117) was found in H. laterepens. Hymenasplenium apogamum showed the most complicated intraspecific variation and included a sexual diploid (n = 39), a sexual tetraploid (n = 78) and an apogamous triploid (n = ca.117). This work reports for the first time the sexual diploids of H.cheilosorum and H. apogamum, which are only apogamous elsewhere in east Asia, Himalayas and Indochina. These results may indicate that this area is one of the diversity centers of Hymenasplenium. Most of the above species have chromosome numbers based on x = 39. In contrast, H. costarisorum contains a sexual diploid (n = 36) and a sexual tetraploid (n = 72), indicating that its basic number is x = 36.
关键词	Apogamy Aspleniaceae Chromosome Number Cytotaxonomy Hymenasplenium Yunnan Province
学科领域	Plant Sciences
收录类别	SCI
语种	英语
WOS记录号	WOS:000077874600004
引用统计
文献类型	期刊论文
条目标识符	http://ir.kib.ac.cn/handle/151853/2311
专题	资源植物与生物技术所级重点实验室
作者单位	1.Kyoto Univ, Grad Sch Sci, Dept Bot, Kyoto 6068502, Japan 2.Acad Sinica, Kunming Inst Bot, Kunming 650204, Peoples R China
推荐引用方式 GB/T 7714	Cheng, X,Murakami, N. Cytotaxonomic study of genus Hymenasplenium (Aspleniaceae) in Xishuangbanna, southwestern China[J]. JOURNAL OF PLANT RESEARCH,1998,111(1104):495-500.
APA	Cheng, X,&Murakami, N.(1998).Cytotaxonomic study of genus Hymenasplenium (Aspleniaceae) in Xishuangbanna, southwestern China.JOURNAL OF PLANT RESEARCH,111(1104),495-500.
MLA	Cheng, X,et al."Cytotaxonomic study of genus Hymenasplenium (Aspleniaceae) in Xishuangbanna, southwestern China".JOURNAL OF PLANT RESEARCH 111.1104(1998):495-500.

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