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作者从1984～1989年将稻瘟病抗性筛选与水稻非温室加代育种技术相结合,进行苗期人工喷雾接种和穗期自然诱发鉴定,F_2抗感分离比例符合3:1;累计筛选出中抗以上组合167个和材料426份,分别占筛测总数的68.44％和67.83％;并育成了89-15(8204/早单八)等丰产、早熟、抗病的新品系。实践证明,在水稻非温室加代过程中,采用稻瘟病抗性同步筛选,可增强选择压力,逐步去除感病个体,使抗病个体在群体中所占比例逐代增加,如结合农艺性状的选择,可加快早熟、丰产、抗稻瘟病新品种的选育。
From 1984 to 1989, combining rice blast resistance screening with rice non-greenhouse plus breeding technology, the authors conducted the artificial spray inoculation at seedling stage and the naturally induced identification at the heading stage. The F 2 resistance-sensitive separation rate was in accordance with 3: 1. 167 of the above combinations and 426 of materials, accounting for 68.44% and 67.83% of the total respectively. And a new line with high yield, early maturity and disease resistance of 89-15 (8204 / early single eight) was bred. Practice has proved that in the process of rice non-greenhouse addition, the simultaneous screening of rice blast resistance can enhance the selection pressure and gradually remove the susceptible individuals, so that the proportion of disease-resistant individuals in the population gradually increases, such as the combination of agronomic traits , Can speed up early maturity, high yield, blast resistance breeding of new varieties.