However, conventional selection for grain quality is inefficient because that it is a complicated quantitative trait.
但是玉米籽粒品质性状是复杂的数量性状，因此传统育种方法进行品质遗传改良的效率不高。
However, conventional selection for grain quality is inefficient because that it is a complicated quantitative trait.
但是玉米籽粒品质性状是复杂的数量性状，因此传统育种方法进行品质遗传改良的效率不高。
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