山西省玉米新品种抗大斑病鉴定

Northern leaf blight resistance evaluation of new maize hybrids in Shanxi Province

于2016—2019年通过田间人工接种鉴定,对参加山西省品比试验的818个玉米杂交种进行了大斑病抗性鉴定。结果表明,参加试验的玉米品种在大斑病抗性上整体水平较稳定,中抗以上材料占72.38%,高抗材料总体上相对匮乏,仅占0.37%,分别为Q9785、美硕816、周玉1。对不同熟期杂交种的抗病性进行分析,可以看出中晚熟品种的大斑病抗性明显高于早熟品种与特早熟品种。其中,中抗以上比例分别达76.75%、60.36%、50%。3种不同类型的玉米杂交种中,其抗性水平从高到低依次为普通玉米、糯玉米、甜玉米。

The northern leaf blight resistance of 818 maize hybrids in Shanxi Province was evaluated by field inoculation identification from 2016 to 2019.The results showed that the resistance of maize cultivars in Shanxi Province was relatively stable,72.38%of the cultivars had moderate to high resistance,while only 0.37%of them were highly resistant.By analyzing the resistance of three hybrids that have different maturity periods,the results showed that the resistance of middle-late maturing cultivars was significantly higher than that of early maturing cultivars and extra-early maturing cultivars.Among them,the proportion of cultivars with moderate and higher resistance was 76.75%,60.36%,and 50%,respectively.Among the three different types of maize hybrids,the resistance from high to low was common maize,waxy maize,and sweet maize.