青藏高原东缘2种风毛菊属植物的核型研究  

A study on karyotypes of two Saussurea species from the eastern Qinghai-Tibetan plateau

作　　者：李淮[1] 王转莉[1] 巩红冬[1] 王一峰[1] 

机构地区：[1]西北师范大学生命科学学院,甘肃兰州730070

出　　处：《西北师范大学学报（自然科学版）》2008年第2期95-98,共4页Journal of Northwest Normal University(Natural Science)

基　　金：甘肃省自然科学基金资助项目(3ZS051-A25-0243ZS041-A25-008);甘肃省教育厅科研资助项目(041-15)

摘　　要：对产于青藏高原东缘2种风毛菊属(SaussureaD C.)植物的染色体数目和核型进行了研究.结果表明:重齿风毛菊(S.katochaete)的染色体数目和核型为2n=2x=32=10m+16sm+6st,而弯齿风毛菊(S.przewalskii)染色体数目和核型为2n=2x=32=10m+22sm.根据Stebbins提出的核型分类原则,这2个种的核型分别为3B和2B型.In this paper, the chromosome numbers and karyotypes of two Saussurea species from the eastern Qinghai-Tibetan Plateau are studied. The chromosome number and karyotype of S. katochaete are revealed to be 2n=2x=32=10m＋16sm＋6st, while S. przewalskii has 2n=2x=32=10m＋22sm. The karyotypes of both species are belong to 3B or 2B according to the Stebbins＇s classification.

关 键 词：风毛菊属 核型 青藏高原 

分 类 号：Q343.2[生物学—遗传学]