meioses

1.In D18S, on the contrary, there is no apparent disintegration at meioses stage.,only in a few tapetum cells occurred some blank regions.

不育系水稻D18S绒毡层减数分裂期解体现象不明，部分内部成空腔；

2.Pollen mother cells undergo meioses through simultaneous cytokinesis and give rise to tetrads of microspores, which are tetrahedrally arranged.

花粉母减数分裂，质分裂属同时型，产生小孢子四分体，为四面体。