作 者 ：YANG Lei, XU Jie-Mei, ZHANG Xiao-Liang, WAN Hai-Qing
期 刊 ：植物分类学报 1998年 1期
Keywords:Allium, Karyotype, Population,
Abstract:
The present paper reports the chromosome numbers and karyotypes of 11 popula-
tions of six species of Sect. Bromatorrhiza and Sect. Rhizirideum in Allium (Liliaceae).
The results are as follows: A. cyathophorum Bur. et Franch.: 2n＝2x＝16=12m+4sm
(2SAT). A. przewalskianum Regel:
2n=4x＝32＝28m+4st(2SAT) and 2n=4x＝32=
28m+2sm+2st(2SAT) respectively from Zhagyab in Xizang and Lixian in Sichuan. A.
polyrhizum Turcz. ex Regel: 2n=4x=20m+8sm+4t(2SAT). A. mongolicum Regel:
2n=2x=16=14m+2st(2SAT). A. senescens L.: 2n=4x＝32＝28m+2sm+2st(2SAT)
and 2n=4x＝32＝24m+4sm+4st(2SAT) respectively from Ulrung-do (DPRK) and
Horqin Zuoyi Houqi, Nei Monggol. A. tuberosum Rottl. ex Spreng.: Four populations of
this species were studied. One from Yongji in Shanxi is diploid with 2n=2x＝16＝14m+2st
(2SAT) and the other three populations respectively from Lixian, Yulong and Sanwayao in
Sichuan are all tetraploid with 2n=4x＝32=28m+4st(2SAT). The chromosome numbers
and karyotypes of A. przewalskianum, A. polyrhizum and A. mongolicum are reported
here for the first time. The wild diploid population of A. tuberosum is found here for the
first time in China. In additon, the origin of cultivated A. tuberosum and the karyotypical
differentiations among the populations of A. cyathophorum, A. przewalskianum and A.
senescens are discussed.