%0 Journal Article
%T A study on cytotaxonomy of Sect. Anguinum of Allium<br>葱属宽叶组植物细胞分类学研究
%A JING Wang
%A Chun
%A XU Jie
%A Mei
%A YANG Lei
%A <br>景望春
%A 许介眉
%A 杨蕾
%J 植物分类学报
%D 1999
%I 
%X Allium Sect. Anguinum G. Don (Liliaceae) includes five species and three varieties. The results of investigation on 23 local populations, representing five species and one variety of this section, are as follows: (1) In this section, the basic chromosome number is x=8, and the karyotypes of all the species belong to 2A type. All the populations have similar metaphase chromosomes. The similar karyotypical features support the viewpoint that Sect. Anguinum is a natural taxon. (2) Despite the fact that the karyotypical features appear to be similar, karyotypical differences exist in some populations within the same species or among the species. First, there are various levels of ploidy. Second, the occurrence, number and shape of B chromosomes are variable among the populations. Third, as for the satellite chromosomes, there is a polymorphism in occurrence of the tandem satellites. (3) Highly sterile triploid of Allium ovalifolium has a kind of stolon and expands population by vegetative propagation. (4) According to widely geographical distribution and relatively old geological history of the geographical area, A. victorialis is considered as a primitive species in this section. This species, by means of geographical (gradual) speciation, has evolved step by step to the other species. (5) According to the geographical distribution and evolutionary process of Sect. Anguinum, it is proposed that the region from the Hengduan Mountains to the Qingling Range of China be the center of present distribution and differentiation of the section.
%K Allium
%K Sect
%K Anguinum
%K Karyotype
%K Polyploid
%K B chromosome
%K Intraspecific differentiation
%K Interspecific relationship<br>葱属
%K 宽叶组
%K 核型
%K 多倍体
%K B染色体
%K 种内分化
%K 种间亲缘关系
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=90BA3D13E7F3BC869AC96FB3DA594E3FE34FBF7B8BC0E591&jid=ACB22D77D53AF776BE3F554EEA83024E&aid=9F1DE4A07726E554E2AFB17E9860F631&yid=B914830F5B1D1078&vid=42425781F0B1C26E&iid=CA4FD0336C81A37A&sid=A04140E723CB732E&eid=339D79302DF62549&journal_id=0529-1526&journal_name=植物分类学报&referenced_num=10&reference_num=13