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采用7×7不完全双列杂交设计，对反映杂交水稻苗瘟抗性的5个指标进行了配合力和遗传力分析．结果表明，杂交水稻苗瘟抗性遗传力高，受加性和非加性基因效应共同控制，但以加性效应为主；恢复系的苗瘟抗性一般配合力效应明显相对重要于不育系，不育系苗瘟抗性一般配合力效应对F1代的抗性有显著的影响；14个供试亲本中，多恢1号、成恢149、K42A、K40A具有较好的苗瘟抗性一般配合力效应．因此，在杂交水稻抗苗瘟育种中，对恢复系的抗性GCA选择和对亲本的抗性GCA评鉴至关重要，但不应忽视不育系对组合的抗性贡献和对组合的抗性评鉴；多恢1号、成恢149、K42A和K40A可作为优良抗苗瘟亲本加以利用．
The 7 × 7 incomplete diallel cross design was used to analyze the combining ability and heritability of 5 indicators of hybrid rice blast resistance. The results showed that the heritability of blast resistance in hybrid rice was high and controlled by both additive and non-additive genetic effects, but additive effect was the main effect. The general combining ability of restorer lines was obviously more important in infertility The resistance of F1 hybrids was significantly affected by the general combining ability of lines with blast resistance. In the 14 tested parents, Duochui 1, Chenghui 149, K42A and K40A had better blast resistance Sexual general combining power effect. Therefore, GCA selection of restorer lines and GCA evaluation of resistance to the parents are important in hybrid rice blast-resistant breeding, but the contribution of sterile lines to the combinations and their resistance to combination should not be overlooked Sexual evaluation; Duowu 1, Chenghui 149, K42A and K40A can be used as excellent anti-blast blast parents to be used.