云南无量山四种报春花属植物的核型研究

Karyotypes of Four Species of Primula (Primulaceae) from Mt.Wuliangshan, Yunnan

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 sinuataFranch ,2n =2x =2 2 =2 0m (2SAT ) +2st,着丝点端化值 (T C .% )为 5 7 5 1% ;无葶脆蒴报春P sinoexscapaC .M .Hu ,2n =2x =2 2 =2 0m +2sm ,T C .%值为 5 7 78% ;滇北球花报春P denticulatassp .sinodenticulata (Balf.F .etForrest)W .W .Smith ,2n =2x =2 2 =2 0m (4SAT ) +2st,T C .%值为 5 6 79% ;光叶景东报春P interjacensvar.epilosaC .M .Hu ,2n =2x =18=2m (2SAT ) +6sm (4SAT ) +10st,T C .%值为 6 7 4 7%。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。

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.