横断山高山冰缘带两种伞形科特有植物的核型分析  

Karyomorphological Study of Two Endemic Plants(Apiaceae:Pleurospermum)from the Alpine Subnival Belt in Hengduan Mountains

作　　者：孙文远 孙文光[1,2] 李志敏 SUN Wen-yuan;SUN Wen-guang;LI Zhi-min(School of Life Sciences,Yunnan Normal University,Kunming 650500,China;Engineering Research Center of Sustainable Development and Utilization of Biomass Energy,Yunnan Normal University,Kunming 650500,China)

机构地区：[1]云南师范大学生命科学学院,云南昆明650500 [2]云南师范大学生物能源持续开发利用教育部工程研究中心,云南昆明650500

出　　处：《云南师范大学学报（自然科学版）》2020年第2期59-64,共6页Journal of Yunnan Normal University:Natural Sciences Edition

基　　金：国家自然科学基金资助项目(31670206,31960046);国家-云南省联合基金重点资助项目(U1802232);中国科学院A类战略性先导科技专项资助项目(XDA 20050203).

摘　　要：采用植物细胞常规压片法,对横断山高山冰缘带伞形科棱子芹属的两种特有植物——美丽棱子芹(Pleurospermum amabile)和丽江棱子芹(Pleurospermum foetens)进行细胞染色体核型分析.结果表明:棱子芹属内种间染色体基数存在9和11两种类型,其中美丽棱子芹的核型公式为2n=2x=22=14m+8sm,丽江棱子芹的核型公式为2n=2x=18=8m+10sm,两个物种都为二倍体植物且核型不对称性都为2A型.上述两种棱子芹属植物的染色体数目和核型数据均为首次报道.In this paper,chromosome number and karyotype of Pleurospermum amabile and P.foetens were studied firstly.These two species were endemic of the alpine subnival belt from the southwest China.The results show that the two species has different chromosome number and base chromosome numbers in Pleurospermum respectively as x=9 or 11.The nuclear formula of P.amabile is 2n=2x=22=14m+8sm and P.foetens is 2n=2x=18=8m+10sm.The chromosome number and karyotype of the two species were reported for the first time.

关 键 词：核型 特有种 棱子芹属 横断山 

分 类 号：Q942[生物学—植物学] Q949.763.3