Abstract: The present paper reports the chromosome numbers and karyotypes of 9 populations of Allium przewalskianum(Liliaceae). The results are as follows: the populations distributed in lower altitudes such as Huangyuan,Xining and Gonghe are diploid,with karyotype formulas,2n=2x=16=14m+2st(2SAT) (Huangyuan population,Xining population) and 2n=2x=16=12sm+2st(2SAT) (Gonghe population);other population distributed in higher altitudes such as Maqin Yushu,and Nangqian are all tetraploid with 2n=4x=32=28m+4st(2SAT)(Yushu population 1,Nangqian population 1),2n=4x=32=24m+4sm+4st(Maqin population,Yushu population 3) and 2n=4x=32=26+2sm+4st(Yushu population 2).

Key words: Allium przewalskianum, Karyotype, Population, Qinghai

摘要： 本文研究了青海葱属青甘韭9个居群的染色体数目和核型。其中分布于湟源、西宁和共和海拔相对较低的地区的居群为2倍体，核型公式为2n=2x=16=14m+2st(2SAT)(湟源居群和西宁居群)，2n=2x=16=12m+2sm+2st(2SAT)(共和居群)；分布于玛沁、玉树、囊谦等高海拔地区的居群为4倍体，核型公式为2n=4x=32=28m+4st(2SAT)(玉树居群1和囊谦居群1），2n=4x=32=24m+4sm+4st(玛沁居群和玉树居群3)和2n=4x=32=26m+2sm+4st9玉树居群2)；囊谦一个生长在林下的居群为8倍体，2n=8x=64=54m+2sm+8st。讨论了居群间的核型分化和倍性与分布的关系。

关键词: 青甘韭, 核型, 居群, 青海