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

类叶升麻具有毛茛科中最对称和最原始的核型吗?

杨亲二   

  • 收稿日期:1900-01-01 修回日期:1900-01-01 出版日期:1998-11-10 发布日期:1998-11-10
  • 通讯作者: 杨亲二

Does Actaea asiatica Have the Most Symmetric and Primitive Karyotype in the Ranunculaceae?

YANG Qin-Er   

  • Received:1900-01-01 Revised:1900-01-01 Online:1998-11-10 Published:1998-11-10
  • Contact: YANG Qin-Er

摘要:

根据以前的报道,类叶升麻 Actaea asiatica  Hara具有10条大型的中部着丝点染色体和6条较大
    的近中部着丝点染色体,其核型在毛茛科中显得最为对称和原始,而类叶升麻属的其他种类具有10条
    大型的中部着丝点染色体、4条较大的近中部着丝点染色体和两条没有短臂的染色体。在毛茛科中,同
    一属的染色体形态通常十分相似,因此上述类叶升麻的核型分析结果十分可疑。本文重新检查子该种
    的染色体。结果表明其核型与该属其他种类的核型没有明显区别。与升麻属其他4属,即 Beesia,
    Anemonopsis,Souliea,Cimicifuga相比,类叶升麻及该属其他种类都具有两条没有短臂的T染色体,因
    此类叶升麻属 Actaea L.的核型不对称性程度在升麻族中显得最高,其核型在该族中也可能最为进化,
    这两条T染色体可以作为类叶升麻属的细胞学标志,据此可以将该属与升麻族其他4属区别开来。

关键词: 类叶升麻, 核型, 毛茛科

Abstract:

Actaea asiatica was previously reported to have the most symmetric and primitive
karyotype, consisting of 10 m- and 6 sm-chromosomes, which is quite different from those of
the remaining species in the genus Actaea, consisting of 10 m-, 4 sm- and two T-chromo
somes. In this paper, the chromosomes of this species were re-examined. The results show
that Actaea asiatica has the same karyotype as the other species in the genus.  Compared
with the species in other genera in the tribe Cimicifugeae,  i.e.  Beesia,  Anemonopsis,
Souliea and Cimicifuga,  Actaea asiatica,  together with the remaining species of the
genus, has the most asymmetric and thus probably the most advanced karyotype in this tribe
because of the presence of two T- chromosomes in their chromosome complements. The two
T- chromosomes may serve as one of the most important cytological markers, by which the
species in Actaea are clearly distinguishable cytologically from those in Beesia, Anemonop-
sis, Souliea and Cimicifuga.

Key words: Actaea asiatica, Karyotype, Ranunculaceae