【摘 要】
：
“73”单交种,是西南山地玉米主产区主要推广杂交种之一。近年来,由于亲本自交系严重混杂,造成杂交种优势减退,增产作用下降。为了解决亲本自交系纯度检验问题,在实践中我们
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“73”单交种,是西南山地玉米主产区主要推广杂交种之一。近年来,由于亲本自交系严重混杂,造成杂交种优势减退,增产作用下降。为了解决亲本自交系纯度检验问题,在实践中我们发现母本自交系77与父本自交系自330及77×自330杂种种子在一定环
“73 ” single cross breed, is one of the main marketing hybrids in the main producing areas of southwest mountainous maize. In recent years, due to the serious mixed inbred lines of parents, the advantage of hybrids is diminished, and the increase of yield is reduced. In order to solve the problem of purity testing of inbred lines of parents, in practice, we found that female parent inbred lines 77 and male parent inbred lines from 330 and 77 × since 330 hybrid seeds in a certain ring
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