摘要
报道了中国云南产鳞毛蕨科Dryopteridaceae鳞毛蕨属DryopterisAdanson13种植物的染色体数目。其中4个种:多雄拉鳞毛蕨D.alpestris(2n=82)、哈巴鳞毛蕨D.habaensis(2n=82)、脉纹鳞毛蕨D.lachoongensis(2n=82)和永自鳞毛蕨D.yungtzeensis(2n=82)的染色体数目为首次报道;无融合三倍体的川西鳞毛蕨Dryopterisrosthornii、无融合四倍体的大羽鳞毛蕨D.wallichiana以及无融合二倍体的栗柄鳞毛蕨D.yoroii为3个新发现的细胞类型。细胞学研究结果支持高山鳞毛蕨组sect.CaespitosaeS.G.Lu应该为鳞毛蕨属内一个独立的组;中国喜马拉雅地区的鳞毛蕨属植物中存在着大量的无融合二倍体细胞类型。对蕨类植物中同一植株产生不同倍性孢子的现象进行了讨论。
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 fem species is discussed.
出处
《植物分类学报》
CSCD
北大核心
2006年第3期304-319,共16页
Acta Phytotaxonomica Sinica