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

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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

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

YANG Qin-Er. Does Actaea asiatica Have the Most Symmetric and Primitive Karyotype in the Ranunculaceae?[J]. .

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

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