Fig. 2
From: In vitro octaploid induction of Populus hopeiensis with colchicine
Determination of the ploidy levels in the regenerated P. hopeiensis plants. A Flow cytometry histogram of tetraploids. B Flow cytometry histogram of octaploids. C Somatic chromosome number in tetraploids (2n = 4x = 76). D Somatic chromosome number in octaploids (2n = 8x = 152)