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中国特有属——羽叶点地梅属的细胞学研究

孔宏智,刘建全   

  • 收稿日期:1900-01-01 修回日期:1900-01-01 出版日期:1999-09-10 发布日期:1999-09-10
  • 通讯作者: 孔宏智

Karyomorphology of the genus Pomatosace Maxin. (Primulaceae)

KONG Hong-Zhi, LIU Jian-Quan   

  • Received:1900-01-01 Revised:1900-01-01 Online:1999-09-10 Published:1999-09-10
  • Contact: KONG Hong-Zhi

摘要:

 本文首次对中国特有的羽叶点地梅属Pomatosace Maxim.进行了细胞学研究。羽叶点地梅P. filicula Maxim.的间期核和有丝分裂前期染色体分别为复杂染色中心型和中间型;染色体数目为2n=20,核型公式为2n=18m+2sm;染色体大小介于6.4μm至4.1 μm之间;核型不对称性为2A型。细胞学证据支持羽叶点地梅属与点地梅属相近的观点。

关键词: 羽叶点地梅属, 核型

Abstract:

 Reported in this paper was the karyomorphology of the monotypic genus Po-
matosace Maxim. The interphase nuclei and prophase chromosomes of P. filicula Maxim.
were categorized to be complex chromocenter type and interstitial type respectively;  the
metaphase chromosomes were counted to be 2n = 20, ranging in length from 6.4µm to 4.1µm; the karyotype was formulated as 2n= 18m + 2sm, with the karyotype asymmetry belonging to 2A. The similar karyomorphological characteristics of interphase nuclei and prophase chromosomes between Pomatosace and Androsace, together with the similar sizeand morphology of their metaphase chromosomes, support the viewpoint that they are closelyrelated.

Key words: Pomatosace Maxim., Karyomorphology