| 摘要: |
| [目的]研究产于青藏高原东缘4种风毛菊属(Saussurea DC.)植物的染色体数目和核型.[方法]利用常规压片技术,对4种风毛菊的染色体数目和核型进行了分析.[结果]4个种的染色体数目和核型如下:星状雪兔子(S.stella)为2n=2x=30=18m+12sm,水母雪兔子(S.medusa)为2n=2x=34=20m+10sm+4st,异色风毛菊(S.brunneopilosa)为2n=2x=30=10m+20sm,禾叶风毛菊(S.graminea)为2n=2x=28=6m+20sm+2st;核型均属2B型.[结论]4个种的染色体中均未发现随体,且都为二倍体;禾叶风毛菊较其他3种风毛菊进化. |
| 关键词: 风毛菊属 核型 青藏高原 |
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| 基金项目:甘肃省自然科学基金项目(3ZS051-A25-024);甘肃省教委科研项目(041-15);甘肃省科技厅科研项目(3ZS041-A25-008) |
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| Study on karyotypes of 4 species of Saussurea DC. in the east of Qinghai-Tibetan Plateau |
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| Abstract: |
| 【Objective】 The paper studied the chromosome numbers and the karyotypes on 4 species of Saussurea DC.in the east of Qinghai-Tibetan Plateau.【Method】 With technology of the conventional squashing slides,the chromosome numbers and the karyotypes on 4 species of Saussurea were analyzed.【Result】 The chromsome numbers and the karyotypes were as follows:S.stella 2n=2x=30=18m+12sm;S.medusa 2n=2x=34=20m+10sm+4st;S.brunneopilosa 2n=2x=30=10m+20sm;S.graminea2n=2x=28=6m+20sm+2st;Their karyotypes belonged to stebbings 2B type.【Conclusion】 In this paper,no satellites were found in these 4 species,and they were all diploid;S.graminea was more evolutionary than other 3 species of Saussurea. |
| Key words: Saussurea DC karyotype Qinghai-Tibetan Plateau |
