| 蓟属两种植物的染色体研究 |
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| 引用本文： | 鄢本厚, 尹祖棠,. 蓟属两种植物的染色体研究[J]. 广西植物, 1995, 15(2): 172-175 |
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| 作者姓名： | 鄢本厚 尹祖棠 |
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| 作者单位： | 北京师范大学生物系 |
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| 摘 要： | 本文对蓟属（Ｃｉｒｓｉｕｍ）的两个形态相似的近缘种大刺儿菜和小刺儿菜进行了染色体研究，其中后者为首次报道。观察结果表明：两个种的染色体数目均为２ｎ＝２ｘ＝３４：它们的核型是：大刺儿菜．２ｎ＝２ｘ＝３４＝２０ｍ＋１２ｓｍ＋２ｓｔ：小刺儿菜．２ｎ＝２ｘ＝３４＝２２ｍ＋１０ｋｍ（２ＳＡＴ）＋２ｓｔ。通过核型比较，认为它们是两个独立的种．而且后者比前者进化。
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| 关 键 词： | 蓟属；染色体数目；核型分析 |
CHROMOSOME STUDIES OF 2 SPECIES OF CIRSIUM |
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| Yan Benhou and Yin Zutang. CHROMOSOME STUDIES OF 2 SPECIES OF CIRSIUM[J]. Guihaia, 1995, 15(2): 172-175 |
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| Authors: | Yan Benhou and Yin Zutang |
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| Abstract: | Reported in this paper are results of chromosome studies of 2 species of Cirsium:C.setosum and C.segetum,which are morphologically very similar.The number and karyotype of the latter are here reported for the first time. The results show that tile chromosome numbers of the 2 species are 2n=2x=34. The karyotype formulae are as follows:C.setosum,2n=2x=34=20m+ 12st+ 2st:C.segetum,2n=Zx=34=22m+10sm(2SAT)+ 2st.Compared the two karyotypes, it is considered that C.setosum and C.segetum are two independent species,and the latter is advance than the former. |
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| Keywords: | Cirsium chromosome number karyotype |
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