Chromosome numbers of 13 species in the genus Dryopteris (Dryopteridaceae) from Yunnan, China

被引：8

作者：

Xiang Jian-Ying ^{[1
]}

Cheng Xiao ^{[1
]}

Wu Su-Gong ^{[1
]}

机构：

[1] Chinese Acad Sci, Kunming Inst Bot, Lab Plant Biodivers & Biogeog, Kunming 650204, Peoples R China

来源：

ACTA PHYTOTAXONOMICA SINICA | 2006年 / 44卷 / 03期

关键词：

Dryopteris; chromosome number; cytotype; cytotaxonomy;

D O I：

10.1360/aps040152

中图分类号：

Q94 [植物学];

学科分类号：

071001 ;

摘要：

Chromosomes of 13 species in the genus Dryopteris Adanson (Dryopteridaceae) from Yunnan, China have been counted. The numbers in four species, D. alpestris Tagawa (2n=82), D. habaensis Ching (2n=82), D. lachoongensis (Bedd.) Nayar & Kaur (2n=82), and D. yungtzeensis Ching (2n=82), were reported for the first time. The triploid apomict D. rosthornii (Diels) C. Chr. (2n=123), the tetraploid apomict D. wallichiana (Spreng.) Hylander ('n'=164, 2n=164) and the diploid apomict D. yoroii Serizawa (2n=82) represent three new cytotypes. Our results support the establishment of the section Caespitosae S. G. Lu, and indicate a high percentage of the diploid apomict cytotype in Dryopteris from the Himalayan region of China. The phenomenon of the presence of different cytotypes in a same plant of fern species is discussed.

引用

页码：304 / 319

页数：16

共 31 条

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