款冬属的核形态(菊科:千里光族)

植物研究 ›› 2000, Vol. 20 ›› Issue (3): 313-317.

款冬属的核形态(菊科:千里光族)

刘建全

中国科学院西北高原生物研究所, 西宁 810001, 青海

收稿日期:1999-07-29 出版日期:2000-09-15 发布日期:2016-06-14
作者简介:刘建全(1969-),男,博士,副研究员,从事系统与进化植物学。

KARYOMORPHOLOGY OF TUSSILAGO L. (ASTERACEAE:SENECIONEAE) AND ITS SYSTEMATIC SIGNIFICANCE

LIU Jian-quan

Northwest Plateau Institute of Biology, the Chinese Academy of Science, Xining 810001

Received:1999-07-29 Online:2000-09-15 Published:2016-06-14
Supported by:
Supported by the President Foundation of the Chinese Academy of Sciences and the Natural National Sciences Foundation of China (39670059)

摘要/Abstract

摘要： 研究了款冬属的核形态。染色体间期为简单型与复杂型的过渡型;前期染色体为近基型与中间型的过渡型。染色体较小,核型不对称,具明显的二型性;数目与核型公式为2n=60=42m+10sm+6st+2t。比较发现款冬的核型明显不同于千里光族中已有的核型记载,其核型特征似乎与它独特的形态特征相联系,具有重要的系统学意义。

关键词: 款冬属, 千里光族, 核形态

Abstract: Investigated in the present paper was the karyomorphology of Tussilago L. The interphase nuclei were categorized to be the intermediate type between the simple chromocenter type and complex chromocenter type, and the mitotic prophase chromosomes were classified as the intermediate type between the proximal type and interstitial type. The metaphase chromosomes were rather small, ranging from 2.67μm to 1.05μm and the average length was 1.37μm. The karyotype was formulated as 2n=60=40m+8sm+10st+2t with distinct bimodality. The karyomorphological characteristics of Tussilago are disctinct from those of other genera reported in the Senecioneae and seem to be correlated to its unique gross morphology.

Key words: Tussilago, Senecioneae, Karyomorphology

刘建全. 款冬属的核形态(菊科:千里光族)[J]. 植物研究, 2000, 20(3): 313-317.

LIU Jian-quan. KARYOMORPHOLOGY OF TUSSILAGO L. (ASTERACEAE:SENECIONEAE) AND ITS SYSTEMATIC SIGNIFICANCE[J]. Bulletin of Botanical Research, 2000, 20(3): 313-317.