Abstract: In present paper, the karyotypes and the centromeric terminalization value(T.C.%) of four species of the genus Primula from Mt.Wuliangshan, Yunnan Province are reported for first time: P.sinuata Franch.(2n=2x=22=20m(2SAT)+2st; T.C.%=57.51%), P.sinoexscapa C.M.Hu(2n=2x=22=20m+2sm; T.C.%=57.78%), P.denticulata ssp. sinodenticulata(Balf.F.et Forrest)W.W.Smith(2n=2x=22=20m(4SAT)+2st; T.C.%=56.79%)and P.interjacens var.epilosa C.M.Hu(2n=2x=18=2m(2SAT)+6sm(4SAT)+10st; T.C.%=67.47%). In addition, the probably original basic chromosome number of the genus Primula are discussed briefly.

Key words: Primula

摘要： 研究了云南无量山报春花属(Primula)3组4种植物的核型。体细胞中期染色体的数目和核型分别为：波缘报春P.sinuata Franch，2n=2x=22=20m(2SAT)+2st，着丝点端化值(T.C.%)为57.51%；无葶脆蒴报春P.sinoexscapa C. M. Hu，2n=2x=22=20m+2sm，T.C.%值为57.78%；滇北球花报春P.denticulata ssp. sinodenticulata (Balf.F.et Forrest) W.W.Smith，2n=2x=22=20m(4SAT)+2st，T.C.%值为56.79%；光叶景东报春P.interjacens var.epilosa C.M.Hu，2n=2x=18=2m(2SAT)+6sm(4SAT)+10st，T.C.%值为67.47%。简要讨论了报春花属植物可能的染色体原始基数和3个组的染色体基数。

关键词: 报春花属, 核型, 染色体基数