Cytokinesis is of the simultaneous type and microspore tetrads are mainly tetrahedral.
小孢子母细胞减数分裂为同时型.
The tetrads eventually shrivel or are resorbed.
这种四分体最终萎缩或被再吸收.
Super - microspore happened in the 5 % ~30 % or more tetrads and its formation was directly concerned with B - chromosome.
四分体中额外小孢子的形成与B - 染色体直接有关,其频率为5%～30%或更高.