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醉鱼草属四个种的核型分析
引用本文:陈高,孙卫邦.醉鱼草属四个种的核型分析[J].云南植物研究,2006,28(1):37-40.
作者姓名:陈高  孙卫邦
作者单位:1. 中国科学院昆明植物研究所,云南,昆明,650204;中国科学院研究生院,北京,100039
2. 中国科学院昆明植物研究所,云南,昆明,650204
基金项目:中国科学院知识创新工程项目
摘    要:报道了醉鱼草属(Btuldleja)4个种的染色体核型。云南醉鱼草(B.yunnanensis)的核型公式为2n=2x=38=22m+16sm,皱叶醉鱼草(B.crispa)为2n=2x=38=26m+10sm+2st,密蒙花(B.officinalis)为2n=2x=38=20m+16sm+2st,口本醉鱼草(B.japonica)为2n=2x=38=20m+16sm+2st。日本醉鱼草的核型为2B型,其它3个种的核型为2A型。根据核型分析结果,结合形态学特征和已有的细胞学资料,初步讨论了醉鱼草组(Sect.Neemda)两个系(Series)可能的演化关系。

关 键 词:醉鱼草属  核型  演化趋势
文章编号:0253-2700(2006)01-037-04
收稿时间:2005-06-29
修稿时间:2005-10-27

Karyotype of Four Species in Buddleja (Loganiaceae)
CHEN Gao,SUN Wei-Bang.Karyotype of Four Species in Buddleja (Loganiaceae)[J].Acta Botanica Yunnanica,2006,28(1):37-40.
Authors:CHEN Gao  SUN Wei-Bang
Institution:1 Kunming Institute of Botany, Chirtese Academy of Sciences. Kunming 650204, China 2 Graduate School of the Chinese Academy of Seiences, Beijing 100039, China
Abstract:The chromosome numbers and karyotypes of the 4 species in genus Buddleja were reported.The karyotype formulas are 2n=2x=38=22m+16sm (B.yunnanensis),2n=2x=38=26m+10sm+2st (B.crispa),2n=2x=38=20m+16sm+2st (B.officinalis),and 2n=2x=38=20m+16sm+2st (B.japonica).Karyotype of B.japonica belongs to Stebbins's 2B type and other 3 species belong to Stebbins's 2A type.Based on the cytological data (karyotypes and the recorded chromosome numbers) and the species morphologies,the evolution trend of the two series in Sect.Neemda was briefly discussed.
Keywords:Buddleja  Karyotype  Evolution trend
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