| 华南地区3种兔儿风属植物(菊科-帚菊木族)的细胞学研究 |
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| 引用本文： | 任琛,袁琼.华南地区3种兔儿风属植物(菊科-帚菊木族)的细胞学研究[J].热带亚热带植物学报,2012,20(1):51-57. |
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| 作者姓名： | 任琛 袁琼 |
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| 作者单位： | 1. 中国科学院华南植物园,中国科学院植物资源保护与可持续利用重点实验室,广州 510650;中国科学院研究生院,北京 100049
2. 中国科学院华南植物园,中国科学院植物资源保护与可持续利用重点实验室,广州 510650 |
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| 基金项目： | This work was supported by the Natural Science Foundation of Guangdong Province (9151009001000046). |
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| 摘 要： | 首次报道了华南地区兔儿风属(Ainsliaea DC.)(菊科-帚菊木族Asteraceae-Pertyeae)3种植物共4个居群的染色体数目和核型。其中长穗兔儿风(A.henryi Diels)的染色体数目为2n=24,核型公式为2n=16m+8sm;三脉兔儿风(A.trinervis Y.C.Tseng)的染色体数目为2n=26,核型公式为2n=16m+10sm;莲沱兔儿风(A.ramosa Hemsl.)2个居群的染色体数目均为2n=26,核型公式为2n=26=22m+4sm。所有居群的染色体由大到小逐渐变化,核型没有明显的二型性。这些结果表明兔儿风属植物确有x=12和x=13两个基数,其中x=13可能是该属的原始基数。
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| 关 键 词： | 兔儿风属 菊科 染色体基数 细胞分类学 核型 |
| 收稿时间： | 2011/4/30 0:00:00 |
| 修稿时间： | 6/5/2011 12:00:00 AM |
Cytology in Three Species of Ainsliaea (Asteraceae-Pertyeae) from Southern China |
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| REN Chen and YUAN Qiong.Cytology in Three Species of Ainsliaea (Asteraceae-Pertyeae) from Southern China[J].Journal of Tropical and Subtropical Botany,2012,20(1):51-57. |
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| Authors: | REN Chen and YUAN Qiong |
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| Institution: | 1. Key Laboratory of Plant Resources Conservation and Sustainable Utilization, South China Botanical Garden, Chinese Academy of Sciences, China; 2. Graduate University of Chinese Academy of Sciences, China;Key Laboratory of Plant Resources Conservation and Sustainable Utilization, South China Botanical Garden, Chinese Academy of Sciences, China |
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| Abstract: | Chromosome numbers and karyotypes in four populations of three species in the genus Ainsliaea DC. (Asteraceae-Pertyeae) from southern China have been investigated for the first time. The chromosome number of A. henryi Diels was counted to be 2n=24, and the karyotype was formulated as 2n=16m+8sm. The number of A. trinervis Y. C. Tseng was counted to be 2n=26, and the karyotype was formulated as 2n=16m+10sm. Both populations of A. ramosa Hemsl. had 2n=26 and the karyotype of 2n=22m+4sm. In all of the populations studied the chromosomes showed a steady gradation in length from the longest to the shortest, with no evidence of bimodality. The results have confirmed the occurrence of two basic chromosome numbers, x=12 and x=13, in the genus Ainsliaea, with x=13 very likely being the primitive number. |
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| Keywords: | Ainsliaea Asteraceae Basic chromosome number Cytotaxonomy Karyotype |
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