【摘要】 以6个自选爆裂玉米自交系与10个分属于不同优势类群的普通玉米自交系按NCⅡ遗传设计组配而成的60个普×爆F1组合为材料.分析了9个性状的配合力,并对爆裂玉米自交系进行了聚类分析.结果表明,爆裂玉米自交系的GCA存在显著差异,N09具有较高的组配利用价值.膨化倍数的SCA仅濮阳点的374×N09为极显著正值,穗粒重仅长葛点的改3×N04、豫87-1×N14和濮阳点的昌7-2×N14为极显著正值;普×爆F1组合的穗粒重均有很大提高,但膨化倍数较差,无直接利用价值.6个爆裂自交系划分为4类:N08,N10和N09为一类,N04,N05,N14各成一类.聚类结果与育种实际完全相符.更多还原

【Abstract】 Using NC II genetic design six popcorn inbreds were crossed with ten normal corn inbreds belonging to different heterotic groups,and the GCAs and SCAs of 9 characters were analyzed,and the 6 popcorn inbreds were clustered using SCAs.The results showed that the GCAs of 6 popcorn inbreds were significantly different.(N 09) had the greatest GCA value for most characters,so had the greatest value in further popcorn crosses making.For SCAs only the expansion volume of 374×(N 09) at Puyang and the ear_kernel weight for Gai 3×(N 04) and Yu 87-1×(N 14) at Changge and Chang 7-2×(N 14) at Puyang were significantly positive.Almost all the ear_kernel weight of 60 popcorn×normal corn crosses were much higher than CK,but their expansion volume was very low.So popcorn×normal corn crosses had no value in direct utilization.The 6 popcorn inbreds were divided into 4 heterotic groups, (N 04),(N 05) and (N 14) as one group seperately,and the other 3 inbreds (N 08),(N 09) and (N 10) in another group,which was in great agreement with popcorn breeding before.更多还原