横断山及邻近地区风毛菊属三个种的核形态学  

Karyomorphology of the Three Species of Saussurea (Asteraceae) from Hengduan Mountians and the Adjacent Areas

作　　者：岳学坤[1] 蔡金红[1] 李志敏[1] 孙航[2] 

机构地区：[1]云南师范大学生命科学学院,云南昆明650031 [2]中国科学院昆明植物研究所生物多样性与生物地理学重点实验室,云南昆明650204

出　　处：《云南植物研究》2008年第4期433-436,共4页Acta Botanica Yunnanica

基　　金：国家自然科学基金项目(30770167;40771073;30625004)

摘　　要：对风毛菊属(Saussurea)3种植物进行了核形态学研究。昂头风毛菊(Saussurea sobarocephala)核型公式为:2n=2x=34=6m+26sm+2st;弯齿风毛菊(Saussurea przewalskii)核型公式为:2n=2x=32=12m+14sm+6st;三角叶风毛菊(Saussurea deltoidea)核型公式为:为:2n=2x=34=26m+8sm,染色体数2n=34与前人报道一致。3种植物中,除三角叶风毛菊的核型不对称性为1B型外,另两种的核型不对称性均属于3B型。它们的间期核均为复杂染色体型,前期染色体为中间型。Chromosome numbers and karyotypes of three species from Saussurea （Asteraceae）, S. sobarocephala, S.przewalskii and S. deltoidea were studied. S. sobarocepluda 2n = 2x = 34 = 6m ＋ 26sm ＋ 2st with type 3B asymmetry and S. przewalskii 2n = 2x = 32 = 12m ＋ 14sin ＋ 6st with type 3B asymmetry were reported firstly. S. deltoidea 2n = 2x = 34 = 26m ＋ 8sm with type 1B was also confirmed. The interphase nuclei and prophase chromosomes of all these species were found to be of the complex chromosome type and interstitial type.

关 键 词：染色体数目 核形态学 风毛菊属 横断山区 

分 类 号：Q943[生物学—植物学]