摘 要 ：对8种(变种)中国秋海棠属(Begonia L.)植物的体细胞染色体数目进行了报道,分别为:盾叶秋海棠Begonia cavaleriei Lévl.2n=30; 角果秋海棠B.ceratocarpa S.H.Huang et Shui 2n=20;掌叶秋海棠B.hemsleyana J.D.Hooker 2n=20;长果秋海棠B.longicarpa K.Y.Guan et D.K.Tian 2n=20;红孩儿B.palmata var. browingiana (Champ.ex Benth.) J.Golding et C.Kareg. 2n=22;大王秋海棠B.rex Putz. 2n=22+1B;勐养秋海棠B.mengyangensis subsp .mengyangensis M. C.Tebbitt et K.Y.Guan 2n=22;变色秋海棠B.versicolor Irmsch.2n=22.除掌叶秋海棠、大王秋海棠和变色秋海棠外,其余染色体数目均为首次报道 .
Abstract:The somatic chromosome numbers of 8 taxa of Begonia from Yunnan, China are reported: Begonia cabaleriei Levl. 2n=30; B.ceratocarpa S.H.Huang et Shui 2n=20; B.hemsleyana J.D.Hooker 2n=20; B.longicarpa K.Y.Guan et D.K.Tian 2n=20; B.palmata var. browingiana (Champ. ex Benth.)J.Golding et C.Kareg.2n=22;B.rex Putz.2n=22;B.silletensis subsp.mengrangensis M.C.Tebbitt et K.Y.Guan 2n=22 ();Bversicolor Irmscher 2n=22.Their chromosome numbers are reported here for the first time except those of B.hemsleyana, B.rex and B.versicolor.