利用1 031个SNP标记对39份甜玉米自交系进行基因型分析,结果表明,1 031个SNP标记在供试材料中的平均多态性信息含量(PIC)为0.290,最小等位基因频率(MAF)平均值为0.275.39份自交系间遗传距离变化范围为0.032～0.678,平均值为0.430.通过Neighbor-joining(NJ)聚类分析,将供试材料划分为5个类群,分别为华珍母本群、京甜糯2群、彩甜糯群、温带种质群和华珍父本群.5个类群间遗传距离变化范围较小,在0.394～0.445之间.华珍父本群与温带种质群之间的遗传距离为0.394,彩甜糯群与华珍父本群、温带种质群之间的遗传距离为0.445.

One thousand and thirty-one Single Nucleotide Polymorphism(SNP) markers were adopted in heterotic grouping of 39 elite sweet corn inbred lines. Polymorphic Information Content(PIC) and Minor Allele Frequncy (MAF) of these SNP markers was 0.290 and 0.275 on average, respectively. Genetic distance between 39 inbred lines ranged from 0.032 to 0.678, with an average value being 0.430. Five groups were divided from the 39 inbred lines by Neighbor-joining(NJ)clustering method which were Huazhen maternal group, Jingtiannuo2 group, Colorful sweet-waxy group, temperate group and Huazhen paternal group. Genetic distance between the groups ranged from 0.394 to 0.445. Huazhen paternal group and Temperate group have the minimum genetic distance being 0.394, while Huazhen paternal and Colorful sweet-waxy group, Temperate group and Colorful sweet-waxy group had the maximum genetic distance being 0.445.