雌蕊原基由小花原基的中央部分直接发育而成。
The central part of the floret primordium changes directly into gynoecium.
叶原基数由基因型和环境条件共同决定，而苞叶原基、小穗原基和小花原基数以环境因子的影响为主。
The number of leaf primordia was affected by both genotype and environment, while the Numbers of bracteal, spikelet and floret primordia were affected mainly by environmental factors.
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