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题名: Cytotaxonomic study of genus Hymenasplenium (Aspleniaceae) in Xishuangbanna, southwestern China
作者: Cheng, X; Murakami, N
刊名: JOURNAL OF PLANT RESEARCH
关键词: apogamy ; Aspleniaceae ; chromosome number ; cytotaxonomy ; Hymenasplenium ; Yunnan Province
英文摘要: 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.
出版日期: 1998-12-01
卷号: 111, 期号:1104, 页码:495-500
语种: 英语
ISSN号: 0918-9440
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内容类型: 期刊论文
URI标识: http://ir.kib.ac.cn/handle/151853/2311
Appears in Collections:资源植物与生物技术所级重点实验室_期刊论文

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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

Recommended Citation:
Cheng, X; Murakami, N.Cytotaxonomic study of genus Hymenasplenium (Aspleniaceae) in Xishuangbanna, southwestern China,JOURNAL OF PLANT RESEARCH,1998,111(1104):495-500
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