【摘要】 本文报道了当归属Angelica及3个近缘小属12种植物的核型,其中10种为首次报道。带岭当归A.dailingensis 2n=22=20m+2sm(SAT);丽江当属A.likiangensis 2n=22=18m+4sm;青海当归A.nitida 2n=22=14m+4sm+4sm(SAT);林当归A.silvestris 2n=22=16m+4sm(SAT)+2st(SAT);紫花前胡A.decursiva 2n=22=16m+4sm+2sm(SAT);秦岭当归A.tsinlingensis 2n=22=18m+4sm;阿坝当归A.apaensis 2n=22=14m+6sm+2st(SAT);隆萼当归A.oncosepala 2n=4x=44=28m+12sm+4st;三小叶当归A.ternata 2n=22=10m+8sm(SAT)+4st(SAT);柳叶芹Czernaevialaevigata 2n=22=14m+6sm+2sm(SAT);短茎古当归Archangelica brevicaulis 2n=22=8m+2m(SAT)+4sm+4sm(SAT)+4st;高山芹Coelopleurum saxatile 2n=28=12m+6sm+10st。除带岭当归核型为1A型和高山芹为2B型外,其余种类均为2A型。根据染色体长度比和平均臂比绘制了本次和我们过去已报道的当归属及近缘属23种植物的核型散点图。据核型类型和近端着丝点的有无,把当归属20个种的核型分3组。并结合外部形态、花粉类型和地理分布,探讨了各近缘属的系统演化关系。更多还原

【Abstract】 The present paper deals with the karyotype analysis of 12 species in Angelica andthree related genera----Czernaevia, Archangelica and Coelopleurum from China. Ten kary-otypes are reported for the first time. The parameters of chromosomes of 12 species are given in Table 1 and the karyotypes are shown in Plates 1, 2, 3. The karyotype formulae are as follows; A. dailingensis Z. H. Pan &. T. D. Zhuang 2n=22 = 20m+2sm (SAT) ; A. likian-gensis Wolff 2n = 22=18m + 4sm; A. nitida Wolff 2n = 22=14m + 4sm+4sm (SAT); A. silvestris L. 2n = 22 = 16m + 4sm (SAT) +2st (SAT); A. decursiva (Mig. ) Fr. &. Sav. 2n = 22 = 16m + 4sm + 2sm (SAT); A. tsinlingensis K. T. Fu 2n = 22 = 18m + 4sm; A. a-paensis Shan & Yuan 2n=22 = 14m+6sm + 2st (SAT); A. oncosepala Hand. -Mazz. 2n = 4x = 44 = 28m+12sm4-4st; A. ternataRgl. &. Schmalh. 2n=22 = 10m+8sm (SAT) + 4st (SAT) ; Czernaevia laevigata Turcz. 2n = 22= 14m + 6sm + 2sm (SAT); Archangelica brevicaulis (Rupr. ) Rchb. 2n = 22 = 8m+2m (SAT) + 4sm + 4sm (SAT) +4st; Coelopleurum saxatile (Turcz. ) Drude 2n = 28=12m+6sm+10st. The karyotypes of all the species belong to "2A" except those of A. dailingensis and Coelopleurum saxatile , which belong to "1A" and "2B" respectively. According to the karyotypic type and the presence or absence of subterminal chromosomes, the karyotypes of 9 species reported in the present paper and 11 species previously reported can be divided into 3 groups. The scatter diagram (Fig. 2) shows the karyotypic evolution of Angelica and related genera Coelopleurum with n = 14 and karyotypic type "2B" is distinct from the related genera. Based on the fact that the kary- otypes are not obviously different among Czernaevia, Archangelica and Angelica, Czernaevia and Archangelica might hotter be merged in Angelica as sections.更多还原