Varieties that do not produce fertile pollen are used as females. 不產(chǎn)生可育花粉的品種被用作母體。
The processes of meiotic division of pollen mother cells were compared between male sterile plants and male fertile ones. 摘要以蘿卜雄性不育株與可育株為試材,比較研究了不育與可育花粉母細胞的減數分裂過(guò)程。