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披碱草属6种植物的核型研究

时英, 郭本兆, 李建华   

  1. (中国科学院西北高原生物研究所,西宁)
  • 收稿日期:1900-01-01 修回日期:1900-01-01 出版日期:1989-05-10 发布日期:1989-05-10
  • 通讯作者: 时英

A Study on Karyotypes of 6 Species of Elymus in China

Shi Ying, Kuo Pen-Chao, Li Jian-Hua   

  1.  (Northwcst Plateau Institute of Biology, Academia Sinica, Xining)
  • Received:1900-01-01 Revised:1900-01-01 Online:1989-05-10 Published:1989-05-10
  • Contact: Shi Ying

摘要:

本文首次报道特产于我国青藏高原披碱草属Elymus的6种植物的染色体数目和核型。6个种的染色体数目为2n=42,都是6倍体。它们的核型是:黑药鹅观草,2n=6x=42=32m+10sm;糙毛鹅观草,2n=6x=42=34m+8sm;大颖鹅观草,2n=6x=42=30m+12sm;疏花鹅观,2n=6x=42=32m+10sm;青海鹅观草,2n=6x= 42=34m十8sm;长颖鹅观草,2n=6x=42=34m十8sm。它们的核型属1B或2B型,染色体中均未发现随体。

关键词: 披碱草属, 核型

Abstract:

 The present paper deals with the karyotype analysis of 6 species of Elymus
which are native to Qinghai-Tibetan plateau.  The number of somatic chromosomes in root-
tip cells of the 6 species and their karyotypes are reportad here for the first time, and they are
all hexaploid, with 2n=6x=42.  The karyotype formulae are as follows:   E. melantherus,
2n=6x=42=32m+10sm, E. kengii, 2n=6x=42=34m+8sm, E grandiglumis, 2n=6x=42=
30 m+12 sm, E. laxiflorus, 2n=6x=42=32 m +10 sm, E. kokonoricus, 2n+6x=42=34 m
 +8 sm, E. longiglumis, 2n+6x=42=34 m+8 sm. No satellites have been founded in the 6
species and all the karyotypes belong to 1B or 2B type:

Key words: Elymus, karyotypes