| 萱草属中国特有种的细胞分类研究 |
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| 引用本文： | 熊治廷,陈心启.萱草属中国特有种的细胞分类研究[J].植物分类学报,1997,35(3):215-218. |
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| 作者姓名： | 熊治廷 陈心启 |
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| 作者单位： | 武汉大学环境科学系，中国科学院植物研究所系统与进化植物学开放研究实验室，中国科学院植物研究所系统与进化植物学开放研究实验室 武汉 430072，北京 100093，北京 100093 |
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| 摘 要： | 对萱草属3个中国特有种，折叶萱草、西南萱草和多花萱草间的亲缘关系，不同学者有不同观点。本文试图从核型特征阐明三者的亲缘关系。折叶萱草、西南萱草和多花萱草的核型公式分别为：2n=12m+8sm+2T；2n=8m+12sm+2T和2n=12m+4sm+4st+2T。核型不对称性依次加大；三者均在T型(第11号)染色体着丝点端具有微小随体。三者染色体组分之间的欧氏距离：折叶萱草与西南萱草为0．2728；折叶萱草与多花萱草为0．4501；西南萱草与多花萱草为0.5741。以上资料表明，折叶萱草与西南萱草更为近缘，而多花萱草比前二者进化。
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| 关 键 词： | 萱草属 中国特有种 核型 |
A CYTOTAXONOMIC STUDY ON CHINESE ENDEMIC SPECIES OF HEMEROCALLIS (LILIACEAE) |
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| Xiong Zhi-ting.A CYTOTAXONOMIC STUDY ON CHINESE ENDEMIC SPECIES OF HEMEROCALLIS (LILIACEAE)[J].Acta Phytotaxonomica Sinica,1997,35(3):215-218. |
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| Authors: | Xiong Zhi-ting |
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| Abstract: | Disagreement exists among research workers in regard to the taxonomic relationship among three Chinese endemic species of Hemerocallis:H.plicata ,H.forrestii and H. multiflora. The present authors attempt to resolve this problem based on a study on kary-otypes. The karyotype formulas of H. plicata , H. forrestii and H. multiflora are respectively 2n=12m 8sm 2T,2n=8m 12sm 2T and 2n = 12m 4sm 4st 2T,in which the T chromosomes (No 11) of all the three species have microsatellites at the centromeric end.The Euclidean distances of chromosome complements are 0. 2728 between H. plicata and H. forrestii ,0. 4501 between H. plicata and H. multiflora and 0. 5741 between H. forrestii and H. multiflora. These data clearly indicate that H. plicata is more closely related to H. forrestii than to H. multiflora ,and that H. multiflora is more advanced than the other two species,for the karyotype of H. multiflora is more asymmetical. |
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| Keywords: | Hemerocallis Chinese endemic species Karyotype |
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