| 摘要: |
| 采用常规压片法,对豆科黄芪属6种植物制备染色体标本进行核型分析。结果表明:体细胞中期染色体数目分别为:沙打旺、斜茎黄芪、达乌里黄芪2n=16,均为二倍体; 草木樨状黄芪2n=32,为四倍体; 紫云英、鹰嘴紫云英则呈现多数目性,紫云英染色体数变动范围为55～65,64条稍多,鹰嘴紫云英染色体数变动范围51～65,62条稍多,均为混倍体。核型公式分别为:沙打旺2n=2x=16=12m+4sm; 斜茎黄芪2n=2x=16=10m+6sm; 达乌里黄芪2n=2x=16=16m; 草木樨状黄芪2n=4x=32=32m; 紫云英2n=64=62m+2sm; 鹰嘴紫云英2n=62=12M+50m(2SAT)。染色体核型呈现多样性。 |
| 关键词: 黄芪属 染色体 核型 |
| DOI：10.3969/j.issn.1000-3142.2012.05.002 |
| 分类号:Q942 |
| Fund project: |
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| Karyotype diversity of six Astragalus species |
|
KONG Hong
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College of Life Sciences, Langfang Normal University, Langfang 065000, China
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| Abstract: |
| Karyotypes were studied by conventional pressed slice method in 6 species in Astragalus. The results showed that the metaphase chromosome numbers were 2n=16 for A.huangheensis、A.adsurgens and A.dahuricus,2n=32 for A.melilotoides,from 55 to 65 for A.sinicus(64 was preponderant),from 51 to 65 for A.cicer(62 was preponderant). The somatic chromosome numbers showed diversity among species. The karyotypes were formulated to be 2n=2x=16=12m+4sm for A.huangheensis,2n=2x=16=10m+6sm for A.adsurgens,2n=2x=16=16m for A.dahuricus,2n=4x=32=32m for A.melilotoides,2n=64=62m+2sm for A.sinicus,2n=62=12M+50m(2SAT)for A.cicer. The karyotype was diverse among species. |
| Key words: Astragalus cromosome karyotype |
