省藤属四种植物的核型分析  

A Karyological Study of Four Species in Calamus (Palmae:Calamoideae)

作　　者：王慷林[1] 谢静 张挺[1] 顾志建[1] 

机构地区：[1]中国科学院昆明植物研究所,云南昆明650204 [2]四川农业大学农学院,四川雅安625014

出　　处：《云南植物研究》2005年第1期87-91,共5页Acta Botanica Yunnanica

基　　金：云南省中青年学术和技术带头人培养经费 (2 0 0 0YP17);云南省应用基础研究项目 (2 0 0 0C0 0 71M );云南省科技攻关项目 (2 0 0 1NG6 2 2 );中科院知识创新工程西南基地昆明植物研究所资助

摘　　要：报道了省藤属 (Calamus) 4种植物的核型 :小省藤 (C gracilis)的核型公式为 2n =2x =16m + 10sm ,盈江省藤 (C nambariensisvar yingjiangensis)为 2n =2x =16m + 10sm ,宽刺藤 (C platyacanthus)为 2n =2x =14m + 12sm ,高地省藤 (C nambariensisvar alpinus)为 2n =2x =14m + 12sm。其体细胞染色体数均为 2n =2 6 ,核型不对称性类型为 2B ,说明其种间染色体核型差异小。但小省藤臂比值大于 2的染色体占 12 % ,而宽刺藤、盈江省藤和高地省藤为 30 % ,说明在系统发育中 。A karyological study of four species in Calamus was performed.The karyotype are as follows:2n=2x=26=16m+10sm for C.gracilis Roxb;2n=2x=26=16m+10sm for C.nambariensis Becc.var. yingjiangensis S.J.Pei et S.Y.Chen;2n=2x=26=14m+12sm for C.platyacanthus Warb.ex Becc.;2n=2x=26=14m+12sm for C.nambariensis Becc.var. alpinus S.J.Pei et S.Y.Chen.The chromosome numbers all are 2n=26.All the karyotypes belonged to stebbins'2B type.This explained the karyological difference in these species was little.The Arm Ratio of Calamus gracilis Roxb.which exceeded 2 accounted for 12% of the total,and that of others are 30%.This showed Calamus gracilis Roxb.may older than the other in phylogenesis.

关 键 词：省藤属 核型 染色体 

分 类 号：Q942[生物学—植物学]