利用AFLP技术对甜瓜属人工异源四倍体(Cucum is×hytivusChen and K irkbride,2n=38)不同自交世代及二倍体亲本DNA进行分析,结果表明多倍体基因组在形成早期发生了广泛的变化,变化位点所占比例高达22.2%。基因组序列变化始于F1代,最高变化率出现在S2代。基因组变化主要表现为部分亲本片段丢失、新片段产生以及后代对亲本某些位点的跳跃式继承。还观察到部分双亲差异性条带呈现出偏父性遗传的特点。 AFLP analysis of different selfing crosses and diploid parental DNAs of Cucumis hyacinthus and K irkbride (2n = 38) showed that the polyploid genome was widespread in early stage Changes in the proportion of change points as high as 22.2%. Genomic sequence changes began in the F1 generation, the highest rate of change appeared in the S2 generation. Genomic changes are mainly reflected in the loss of some of the parental fragments, the generation of new fragments, and the leapfrogging inheritance of some of the parents in the offspring. It was also observed that some of the parents’ differential bands showed the characteristics of paternal paternal inheritance.