| 濒危植物长蕊木兰的核型 |
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| 引用本文： | 张雪梅,刀志灵,龙春林,李恒.濒危植物长蕊木兰的核型[J].云南植物研究,2006,28(3):268-270. |
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| 作者姓名： | 张雪梅 刀志灵 龙春林 李恒 |
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| 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 |
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| 基金项目： | 全球环境基金(GEF)/联合国环境署(UNEP)/联合国大学(UNU)PLEC项目计划;美国国家科学基金;科技部资助项目 |
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| 摘 要： | 报道了长蕊木兰（Alcimandra cathcartii）的染色体核型，核型公式为2n=2x=38=22m＋15sm（3sat）＋1st。核型类型属于Stebbins的2A型。第18条染色体为st染色体，第5、6、7条sm染色体的短臂上各具有1个随体。间期核为简单染色中心型（simple chromocenter type），有丝分裂前期染色体为中间型（interstitial type）。对前人关于木兰属和含笑属植物的核型研究结果进行了比较分析，长蕊木兰与含笑属亲缘关系较近，但稍有区别，而与木兰属的亲缘关系较远。
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| 关 键 词： | 木兰科 长蕊木兰 核型 亲缘关系 |
| 文章编号： | 0253-2700（2006）03-268-03 |
| 收稿时间： | 2005-09-21 |
| 修稿时间： | 2005-10-28 |
Karyotypical Studies on an Endangered Species Alcimandra cathcartii ( Magnoliaceae ) |
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| ZHANG Xue-Mei,DAO Zhi-Ling,LONG Chun-Lin,LI Heng.Karyotypical Studies on an Endangered Species Alcimandra cathcartii ( Magnoliaceae )[J].Acta Botanica Yunnanica,2006,28(3):268-270. |
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| Authors: | ZHANG Xue-Mei DAO Zhi-Ling LONG Chun-Lin LI Heng |
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| Institution: | 1. Kunming Institute of Botany, Chinese Academy of Sciences, Kunming 650204, China; 2. Graduate University of Chinese Academy of Sciences, Beijing 100039, China |
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| Abstract: | The karyotype of Alcimandra cathcartii Dandy is reported for the first time.Its karyotype can be formulated as 2n=2x=38=22m+15sm (3sat)+1st,belonging to Stebbins's 2A type.Only the eighteenth chromosome is st chromosome,and one satellite has been found on the fifth,sixth,and seventh chromosomes respectively.The interphase nucleus is characteristic of simple chromocenter type,and during mitotic prophase,the condensation behavior of chromosomes conforms to the interstitial type.Comparing with previous karyotype research results of Magnolia and Michelia,Alcimandra cathcartii is phylogenetically closed to Michelia but far from Magnolia. |
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| Keywords: | Magnoliaceae Alcimandra cathcartii Karyotype Phylogenetic relationships |
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