【摘要】 1997～1998年选取山西省当前推广和拟推广玉米杂交种及亲本自交系,采用自然感染与人工接种相结合方法,对MDMV抗性和P₁抗性遗传进行了研究,旨为选育推广抗病品种提供依据。试验结果表明,双亲抗×抗、感×抗,其杂种F₁抗性表现显性效应,F₁病情指数0～8.2,均可达到抗病保产的目的,但感×抗必须在无病区制种才能获得成功。试验认为抗×抗是选育抗MDMV杂交种最佳组配方式,感×抗应视为过渡组配方式加以利用,而感×感,F₁病情指数31.9～37.5,产量损失严重,应禁止在病区制种与推广。更多还原

【Abstract】 In order to provide basis for extending maize disease resistant varieties, the experiments of the resistance of the hybrids and inbred lines and their resistant inheritance of F1 were conducted during 1997 - 1998. These hybrids and inbred lines were released or will be released in Shanxi Province. The natural infection and artificial inoculation were used in field experiments. The results showed that the F1 hybrids obtaineded from the cross between resistant x resistant or susceptible x resistant or moderately resistant X moderately resistant had dominant effects, their disease indices of FI ranged from 0.0 to 8.2, and all of F1 hybrids could reach the purpose of resistance to disease and get stable yield. But the commercial seeds that cross between susceptible X resistant should be made in disease-free areas. The results of the experiments also indicated that F1 hybrids of the cross between susceptible x susceptible had poor yield, disease indices ranged between 31.9 - 37.5, so they should not be used for seed production.更多还原