植物分类学报

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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

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.

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