Figure 1

Staging of sorghum anthers. The position of flag leaf, shown by a white arrow, varying from partial to complete emergence in (a) A1, (b) A2, and (c) A3 stages was used as indicator of stage of development. Sections of florets representing A1 (d,g), A2 (e,h) and A3 (f,i) stages at 100× and 400× magnification, respectively.