大白菜杂交制种的防杂保纯山东省淄博市种子公司王玉江，闫敬达，王以生，崔广睦１采用高质量的亲本。大白菜一代杂交种是由双亲经自然授粉获得的，所用亲本必须经过秋季鉴定，凡是达不到原种质量标准的不能用于制种。２认真发放亲本。大白菜杂交制种亲本用量少，繁殖系数... Chinese cabbage cross hybrid seed protection of hybrid seed pure Zibo City, Shandong Province seed company Wang Yujiang, Yan Jingda, Wang Yisheng, Cui Guang Mu 1 using high-quality parents. Chinese cabbage generation of hybrids are obtained by natural pollination of parents, the parents must pass the autumn identification, those who fail to meet the quality standards of the original species can not be used for seed production. 2 Serve the parents seriously. Chinese cabbage cross hybrid seed consumption less, multiplication coefficient ...