题目内容

在玉米中，已知非甜粒基因(Su)对甜粒基因(su)是显性，为了测定玉米籽粒由非甜粒变为甜粒的突变率，需用表现型为，基因型为的玉米作母本，由诱变处理的表现型为__的玉米花粉作父本进行杂交。

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