毛冠菊属系统位置的核形态证据(英文)  

Systematic position of Nannoglottis Maxim. s.l. (Asteraceae): karyomorphological data

作　　者：刘建全[1] 何廷农[1] 刘尚武[1] 

机构地区：[1]中国科学院西北高原生物研究所,西宁810001

出　　处：《植物分类学报》2000年第3期236-241,共6页Acta Phytotaxonomica Sinica

基　　金：TheNationalNaturalScienceFoundationofChina(NSFC ,3 9670 0 59) ,AgrantfromPresidentFoundtionoftheChineseAcademyofSciences

摘　　要：首次记载了毛冠菊属 2种 4居群的核形态资料。两种植物的染色体间期和前期染色体为复杂型和中间型。狭舌毛冠菊两居群的染色体数目与核型公式为 2n =1 8=1 4m + 2sm + 2st( 2SAT) ;毛冠菊两居群的染色体数目与核型公式为 2n =1 8=1 4m + 2sm( 2SAT) + 2st。它们分别代表了整个毛冠菊属的两组植物 ,并包含了形态学上最原始的种类 ,因此 ,该属的染色体基数可能为x =9。核形态证据表明毛冠菊属放在紫菀族比放在旋覆花族和千里光族中更为合理。This paper describes for the first time the karyomorphology of 4 populations of 2 species of Nannoglottis Maxim. s.l. The two species both show the resting nuclei of the complex chromocenter type and the mitotic prophase chromosomes of the interstitial type. The karyotype formula of N. gynura is 2n=18=14m+2sm+2st(SAT) in two populations while that of N. carpesioides is 2n=18=14m+2sm(2SAT)+2st in two populations. The two species under study represent two sections of Nannoglottis s.l. N. gynura, the only species of sect. Stenolepis, is considered as the most primitive member of the genus. Accordingly, the basic chromosome number of the genus might be x=9. Karyomorphological data indicate that Nannoglottis should be placed in the tribe Astereae rather than in the Inuleae and the Senecioneae.

关 键 词：毛冠菊属 核形态 系统位置 染色体数量 核型 

分 类 号：Q949[生物学—植物学]