胎;
The male abortion mostly occurred at the stage between telophase Ⅱ and uni-nucleate microspore formation.
雄性败
大多发生在四分体形成之后至
核
粉粒形成之前。
子植物的)
粉粒The male abortion mostly occurred at the stage between telophase Ⅱ and uni-nucleate microspore formation.
雄性败大多发生在四分体形成之后至核粉粒形成之前。
Homogenous lines can be obtained in a very short time by haploidy breeding method such as microspore culture and anther culture.
摘要通过倍体
途径可
速获得纯合材料，增加有益性状的选择几率，加进程。
Cytokinesis at meiosis of microspore mother cells is modified simultaneous, and tetrads are decussate or isobilateral, occasionally linear.
四分体排列方式为交叉型或左右对称型,偶为直线型；
Pollen mother cells undergo meioses through simultaneous cytokinesis and give rise to tetrads of microspores, which are tetrahedrally arranged.
粉母细胞行减数分裂，细胞质分裂属同时型，产生小孢子四分体，为四面体形。
A dedifferentiation of mitochondria and plastids in structure in microspore mother cells was observed at from diplonema/diakinesis to metaphase Ⅰ,then a redifferentiation at dyad stage.
在小孢子母细胞减数分裂过程中，有核糖体数量存在逐渐减少的现象，质体和线粒体结构在双线期/终 变期和中期Ⅰ趋于简化；
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