作 者 ：Wang Zhen-Qiang, Sun Xiang-Zhong, Wang Hui-Qin
期 刊 ：植物分类学报 1987年 4期
Keywords:Alisma, Karyotype, Classification,
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.