小孢子离体培养的最佳发育时期是单核期；
The best development period for microspore culture is monokaryotic stage;
研究表明，不育系的温度敏感期和光周期敏感期是一致的，即在小麦穗分化的药隔至花粉粒单核期。
The results showed that the stage of photo-sensitivity and thermo-sensitivity was coincident from anther chamber formation to mononucleate.
减数分裂过程中染色体行为异常的花粉母细胞约占10.28%；雄配子体发育过程中异常频率约为3.2%，败育主要发生在单核期。
In meiosis, the pollen mother cells that abnormally acted made up about 10.28% and the male gametophytes abnormally acted at a frequency of 3.2% and mainly aborted at uninucleate stage.
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