中国葱属单生组4种植物的核型研究

doi:10.7523/j.issn.2095-6134.2001.5.003

中国科学院大学学报 ›› 2001, Vol. 39 ›› Issue (5): 423-432.DOI: 10.7523/j.issn.2095-6134.2001.5.003

中国葱属单生组4种植物的核型研究

何兴金,许介眉

收稿日期:1900-01-01 修回日期:1900-01-01 发布日期:2001-09-10
通讯作者: 何兴金

Karyotypes of 4 species in Allium sect. Haplostemon Boiss. from China

HE Xing-Jin, XU Jie-Mei

Received:1900-01-01 Revised:1900-01-01 Published:2001-09-10
Contact: HE Xing-Jin

摘要/Abstract

关键词: 葱属, 单生组, 核型, 多倍体, 进化

Abstract:

Karyotypes of eight populations representing four species of the genus Allium were ana-

lyzed. Included in this study are first reports of the karyotypes for three species from China. All

species examined were diploids, except Allium caeruleum in which diploid, triploid and tetraploid

were found. The results of this study and chromosome data previously published show that: 1 ) the

basic chromosome number of sect. Haplostemon is x = 8, and the karyotypes of all the species in

this section belong to Stebbins' lA and 2A types; 2) polymorphism in satellited chromosomes

among different populations of the same and different species may play an important role in the ada-

ptability of the plants to the habitats; 3) some species of this section, such as Allium caeruleum and

A. macrostemon, appear to be karyotypically diverse at the infraspecific level, and some species

show intraspecific morphological variation and 4) the sterile triploid A. caeruleum and the sterile

pentaploid A. macrostemon increase population size vegetatively through multiplication of bulbs and

bulbils. The relationship of their habitats, breeding systems and polyploid in the section are dis-

cussed. Vegetative reproduction and polyploidy are important in the evolution of polyploid species of

sect. Haplostemon.

Key words: Allium sect. Haplostemon, Karyotype, Polyploid, Evolution

何兴金,许介眉. 中国葱属单生组4种植物的核型研究[J]. 中国科学院大学学报, 2001, 39(5): 423-432.

HE Xing-Jin, XU Jie-Mei. Karyotypes of 4 species in Allium sect. Haplostemon Boiss. from China[J]. , 2001, 39(5): 423-432.

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中国葱属单生组4种植物的核型研究

Karyotypes of 4 species in Allium sect. Haplostemon Boiss. from China

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