| 中国薯蓣属细胞分类的研究——染色体数与该属起源和演化 |
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| 引用本文： | 秦慧贞,张美珍,凌苹苹,丁志遵,窦方平.中国薯蓣属细胞分类的研究——染色体数与该属起源和演化[J].中国科学院研究生院学报,1985,23(1):11-18. |
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| 作者姓名： | 秦慧贞 张美珍 凌苹苹 丁志遵 窦方平 |
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| 作者单位： | (江苏省植物研究所，南京) |
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| 摘 要： | 本文继续报道了薯蓣属(Dioscorea L.)块茎类5个组(sect． Combilium Pr．et Burk.，Sect. Lasiophyton Pr． et Burk.， Sect. Opsophyton Uline， Sect． Shannicorea Pr. et Burk.， Sect. Enantiophyllum Uline)23个种和变种的染色体数，并对一些分类群进行了讨论。它们都是基数为10的多倍体，是本属进化的类型。 根据染色体数的演化和二倍体种类的地理分布，我们推论我国横断山脉地区可能是薯蓣属的起源中心。
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| 关 键 词： | 薯蓣属 T型毛组 复叶组 黄独组 顶生翅组 薯蓣组 染色体数目 起源 演化 |
A Cytotaxonomic Study on Chinese Dioscorea L.—The Chromosome Numbers and Their Relation to the Origin and Evolution of the Genus |
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| Chin Hui-Chen,Chang Mei-Chen,Ling Ping-Ping,Ting Chih-Tsun,Dou Fang-Ping.A Cytotaxonomic Study on Chinese Dioscorea L.—The Chromosome Numbers and Their Relation to the Origin and Evolution of the Genus[J].Journal of the Graduate School of the Chinese Academy of Sciences,1985,23(1):11-18. |
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| Authors: | Chin Hui-Chen Chang Mei-Chen Ling Ping-Ping Ting Chih-Tsun Dou Fang-Ping |
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| Institution: | (Jiangsu Institute of Botany) |
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| Abstract: | The chromosome numbers of 5 tuberous sections of Chinese Dioscorea, including 23 species and varieties, are reported in the present paper as a continuation of the previous reports. They are all polyploids with the basic number x=10. On the basis of analysis of chromosome numbers of whole genus, the rhizomatous diploid species of Sect. Stenophora Uline are presumed to be primitive taxa, while the polyploids of chromosome numbers 40-142 are considered derived groups as a result of hybridization between their ancestral diploids followed by chromosome doubling. Sect. Lasiophyton Pr. et Burk., Sect. Opsophyton UIine, Sect. Shannicorea Pr. et Burk., Sect. Combilium Pr. et Burk. and Sect. EnantiophylIum Uline may be the advanced groups. The chromosomal evolution and geographical distribution suggest that the primitivediploid might have originated in Hengduan Mountains of Asia, an old highland. |
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| Keywords: | Dioscorea Sect Combilium Sect Lasiophyton Sect Opsophyton Sect Shannicorea Sect Enantiophyllum Chromosome number Origin Evolution |
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