欢迎访问中国科学院大学学报,今天是

中国科学院大学学报

• • 上一篇    下一篇

三倍体换锦花在安徽发现

张定成,孙叶根,郑艳,邵建章   

  • 收稿日期:1900-01-01 修回日期:1900-01-01 出版日期:1999-01-10 发布日期:1999-01-10
  • 通讯作者: 张定成

The discovery of triploid Lycoris sprengeri Comes ex Baker from Anhui, China

ZHANG Ding-Cheng, SUN Ye-Gen, ZHENG Yan, SHAO Jian-Zhang   

  • Received:1900-01-01 Revised:1900-01-01 Online:1999-01-10 Published:1999-01-10
  • Contact: ZHANG Ding-Cheng

摘要:

本文对分布于安徽江南和江淮两个地区野生居群的换锦花Lycoris sprengeri进行了细胞学研究,
发现换锦花为一复合体,包括两个不同类型:(1)三倍体类型,分布于安徽马鞍山市采石的野生居群,其
染色体数目和核型为2n=33=9st+21t+3T,属4A核型,极其稳定,该种的三倍体类型为首次发现;(2)
二倍体类型,分布于滁州市琅琊山的野生居群,发现有2个核型,核型I,2n=22=8st+14t,属4A核型,
约占观察细胞的80%;核型Ⅱ,2n=22=1m+1sm+14st+6t,属3B核型,约占观察细胞的20%,该染色
体核型为首次报道。换锦花三倍体居群和二倍体居群的植物外部形态特征基本相同。本文还指出罗伯
逊变化在石蒜属核型演化中起了关键作用。

关键词: 换锦花, 三倍体, 安徽

Abstract:

Lycoris sprengeri Comes ex Baker is endemic to China. Reported in the present
paper are the chromosomes number and karyotypes for two wild populations of the species
from Anhui. ( 1 )Caishi population has a karyotype 2n=33=9st+21t+3T. The length of
chromosomes ranges from 5.58~9.15μm. The karyotype belongs to Stebbin’s (1971)
“4A”. (2)Longyashan populations have two karyotypes. The karyotype formula of the type
I is 2n=22=8st+14t, with chromosomes ranging from 6.88~9.15μm. The karyotype
belongs to “4A”. The karyotype formula of the type Ⅱ is 2n=22=1m+1sm+14st+6t,
with chromosomes ranging from 7.20~15.80μm. The karyotype belongs to “3B”. The
triploid type of L. sprengeri was discovered in Anhui for the first time. The karyotype 2n=22 =1m+1sm+14st+6t in diploid type of this species is here reported for the first time.
The Robertsonian change plays a key role in karyotype evolution of Lycoris.

Key words: Lycoris sprengeri Comes ex Baker, Triploid, Anhui