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1 严格控制亲本来源从品种育成单位及省、市(地)种子公司引进或购买亲本自交系种子。亲本自交系扩繁,要严格遵守亲本繁殖操作规程。空间隔离距离不能少于500m;出苗后严格去杂,根据亲本自交系特征特性去掉变异株;收获后去掉变异穗,单独晾晒,保管、严防机械混杂,确保自交系纯度。要安排专门人员负责这项基础工作,父母亲本自交系一定做到原种扩繁,良种制种,制种亲本自交系要纯度达到99%,净度达到98%,发芽率
A strict control of the origin of the parents Breeding units from the species and the provincial (city) seed companies to introduce or buy the parents of inbred seeds. Parental expansion of inbred lines, to strictly comply with the parental breeding practices. Space isolation distance can not be less than 500m; After the emergence of strict to miscellaneous, according to the characteristics of the parent inbred lines to remove the variant strains; remove the mutant spike after harvest, drying alone, to prevent mechanical confusion to ensure in-line purity. To arrange special staff to be responsible for this basic work, the parents of inbred lines must be the original species expansion, seed production, seed production inbred lines to purity of 99%, the net clarity of 98%, the germination rate