Cytotaxonomic Studies on Alisma L. from Hubei

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Cytotaxonomic Studies on Alisma L. from Hubei

Wang Zhen-Qiang, Sun Xiang-Zhong, Wang Hui-Qin

Received:1900-01-01 Revised:1900-01-01 Online:1987-08-18 Published:1987-08-18
Contact: Wang Zhen-Qiang

Abstract

Abstract:

The karyotypes of Alisma species in Hubei were analysed. The authors have

surveyed populations in fields, measured some morphological characters, made some experiments

of cultivation, and further studied classificatory problems in this genus. The results are as

follows:

1. There are three species in the provinc: A. plantago-aquatica L., A. orientale (Sam.)

Juzep. and A. canaliculatum A. Br. Bouche.

2. A. plantago-aquatica and A. orientale are diploids, 2n=2x=14, A. canaliculatum is

a hexaploid, 2n=6x=42. A new type of karyotype is reported here for A. orientale, which

is contrary to the reports that the karyotypes of Alisma are uniform.

3. There are obvious differences between A. plantago-aquatica and A. orientale in mor-

phology and karyotype and they should be regarded as two separate species.

4. There are three patterns of karyotype variation in this genus: ① Polyploidy; ② Va-

riation of individual chromosomes from symmetry to asymmetry; ③ Increase of karyotype symmetry.

Key words: Alisma, Karyotype, Classification

Wang Zhen-Qiang, Sun Xiang-Zhong, Wang Hui-Qin. Cytotaxonomic Studies on Alisma L. from Hubei[J]. .

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