六个石蒜居群的核型及四倍体石蒜的发现(英文)  

Karyotypes of six populations of Lycoris radiata and discovery of the tetraploid

作　　者：周守标[1] 余本祺[2] 罗琦[1] 胡金蓉[1] 毕德[1] 

机构地区：[1]安徽师范大学生命科学学院,芜湖241000 [2]安徽工程科技学院,芜湖241000

出　　处：《植物分类学报》2007年第4期513-522,共10页Acta Phytotaxonomica Sinica

基　　金：Supported by the Natural Science Fundation of Anhui Province, Grant No. 00042415;a project of Key Laboratory of Biological Resources Conservation and Utilization of Anhui Province.

摘　　要：染色体与核型的变化是植物系统发育和进化的一个重要方面。石蒜属Lycoris植物特别是石蒜L.radiata在染色体数目和核型上存在较大的变异。通过对不同居群的石蒜核型研究,可以为石蒜和石蒜属植物的核型演化及演化机制提供一些重要的基础资料。本文对分布于中国安徽省和浙江省的6个石蒜居群进行了细胞学研究。结果表明,6个石蒜居群的染色体数目和核型分别为:霍山居群2n=44=28st+8t+8T,2n=22=6st+12t+4T;黄山居群2n=22=22t,2n=22=18st+4t,2n=21=12st+7t+2T;滁州居群2n=33=33t;马鞍山居群2n=33=18st+15T,2n=25=1m+20st+2t+2T;宣城居群2n=22=20st+2T,2n=21=1m+20st;杭州居群2n=22=12st+4t+6T,2n=21=18st+3t。其中,部分居群的核型类型为首次报道;并首次发现了四倍体的石蒜居群。此外,对石蒜的核型进化和多倍体起源进行了初步探讨。Chromosomes and karyotypes are important aspects of plant phylogeny and evolution. The chromosome numbers and karyotypes of Lycoris radiata display great variability among and within different populations. By studying different populations of L. radiata we acquired some basic data on karyotype evolution and evolutionary mechanisms in L. radiata and the genus Lycoris. Six populations of L. radiata from Anhui and Zhejiang provinces in China were investigated cytologically. The chromosome numbers and karyotype formulae are as follows： Huoshan populations, 2n=44=28st＋8t＋8T, 2n=22=6st＋12t＋4T; Huangshan populations, 2n=22=22t, 2n=22=18st＋4t, 2n=21=12st＋7t＋2T; Chuzhou population, 2n=33=33t; Ma＇anshan populations, 2n=33=18st＋15T, 2n=25=1m＋20st＋2t＋2T; Xuancheng populations, 2n=22=20st＋2T, 2n=21=1m＋20st; and Hangzhou populations 2n=22=12st＋4t＋6T, 2n=21=18st＋3t. The chromosome numbers and karyotypes of some populations are reported here for the first time and the wild tetraploid population ofL. radiata was found for the first time. In addition, karyotype evolution among populations and the origin ofpolyploids are discussed.

关 键 词：石蒜 核型 四倍体 

分 类 号：Q943[生物学—植物学]