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阐述了协优 5 5 9亲本的生物学特性 ,提出了用叶龄余数和幼穗分化进程来预测协优 5 5 9制种花期安全可靠。总结出3.75 t/ hm2 的产量结构因素。
The biological characteristics of Xieyou 5 5 9 parents were described, and the prediction of the seedling yield of Xieyou 559 was safe and reliable by using leaf age margin and spike differentiation. Summarized the yield structure factor of 3.75 t / hm2.