2个外来玉米种质农艺性状及对丝黑穗病抗性的比较分析

Agronomic Trait and Resistance Responses on Head Smut of Two Exotic Maize Germplasm

对2个外来玉米育种群体美国玉米种质PF6J155和德国玉米种质KAS1216的农艺性状及对玉米丝黑穗病抗性进行了比较分析。结果表明:美国玉米种质的多数农艺性状表型变异系数高于德国玉米种质,美国玉米种质可分为5个类群多于德国玉米种质(3个类群),说明美国玉米种质PF6J155的遗传多样性高于德国玉米种质KAS1216。人工丝黑穗接种鉴定结果表明,美国玉米种质抗性在中抗及其以上的品系占总数的76.09%,明显高于德国玉米种质(54.35%)。美国玉米种质PF6J155符合实际玉米育种要求,可优先加以利用。

The aim was to provide the basis for the utilization of the exotic maize genetic resources.The agronomic traits and the resistance responses of two exotic maize genetic resources（PF6J155 and KAS1216） were investigated.The results showed that the majority of U.S.maize germplasm phenotypic variation coefficient was higher than the Germany maize germplasm.The U.S.maize germplasm could be divided into five groups.The Germany maize germplasm could be divided into three groups,the richness of the U.S.maize germplasm（PF6J155） was higher than the Germany maize germplasm（KAS1216）.Artificial head smut inoculation results showed that the good resistant strains among the U.S.maize germplasm of accounted for 76.09%,higher than the Germany maize germplasm（54.35%）.The resistance responses of the U.S maize germplasm（PF6J155） was better than the Germany maize germplasm（KAS1216）.On the whole,the U.S maize germplasm（PF6J155） have good performance in agronomic trait and head smut resistance which could be used in breeding program.