以6个灰斑病抗性不同的玉米自交系为亲本,按Griffing双列杂交试验设计方法Ⅱ组配15个杂交组合,对叶片病斑覆盖度进行配合力分析,并估算遗传参数.结果表明,6个自交系一般配合力(GCA)效应差别较大,齐319表现高抗;其次是鲁9801、B84和8112;9046和掖478表现感病.结合杂交组合实际表现与特殊配合力效应进行分析,齐319所组配的各组合抗性表现均较好;掖478与8112、9046、B84组配的各组合抗性差;由9046所组配的组合特殊配合力效应好.进一步对遗传参数的分析表明,该性状广义遗传力为64.49%,性状的遗传以加性效应为主,同时存在一定的非加性效应,性状表现受环境影响较大.

According to Griffing diallel experimental methodⅡ, fifteen hybrid combinations were designed by using six maize inbred lines with different gray leaf spot resistances as parents. Combining ability analysis was conducted on leaf spot coverage, and the genetic parameters were estimated. The results showed as follows: GCA effects of the six maize inbred lines are totally different;Qi319 is an inbred line with the highest resistance, secondly Lu9801, B84 and 8112, last 9046 and Ye478 are susceptible. Through combining analysis of investigated data and value of SCA effects, all combinations with Qi319 as one parent performed well on resistance, and the combinations with Ye478 as one parent and 8112, 9046 or B84 as another parent performed susceptible, all combinations with 9046 as one parent performed well on SCA effect. Further analysis of genetic parameters showed that the broad-sense heritability of the trait is 64.49%, inheritance of the trait was major in additive effect while there was certain non-additive effect, and the trait was influenced by the environment greatly.

辽宁省博士启动基金(20091071)、沈阳农业大学博士后基金