Chromosome Studies of 10 Species of Aconitum in China

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Chromosome Studies of 10 Species of Aconitum in China

Shang Xiao-Min, Lee Cheng-Lee

(Department of Biology, Peking University, Beijing)

Received:1900-01-01 Revised:1900-01-01 Online:1984-10-18 Published:1984-10-18
Contact: Shang Xiao-Min

Abstract

Abstract:

This paper deals with chromosomal numbers and morphology of 10 species

of Aconitum in China. According to the basic number of the genus (x=8), these spe-

cies can be referred to diploid, tetraploid, hexaploid and octoploid. Correlation is found

between chromosomal numbers, sizes and structures. The perennial species with a rhizome

are mostly diploid, with chromosomes larger than those in the biennial species with a

tuber, and their chromosome pairs 3-7 are mostly subterminal ones, whereas most

biennial species are polyploid, and their chromosome pairs 3-7 are almost submetacen-

tric. The evolutionary trends of chromosome from diploid to polyploid, large to small,

st to sm are considered possible. The data are agreed with the idea that rhizomal species

are more primitive than tuberous ones. The existence of two types of karyotypes in

these 10 species is a further support of taxonomic division of two subgenera, subgen.

Paraconitum and subgen. Aconitum. In addition, some species are taxonomically dis-

cussed.

Key words: Gen.Aconitum, Subgen.Paraconitum Aconitum, Karyotype, Chromosomal evolution

Shang Xiao-Min, Lee Cheng-Lee. Chromosome Studies of 10 Species of Aconitum in China[J]. .

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Chromosome Studies of 10 Species of Aconitum in China

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