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用５００个随机引物，对我国主栽的协优杂交稻组合及其双亲进行ＲＡＰＤ分析，发现２８个引物能够在供试材料中产生多态性差异，其中，８个引物所产生的１１条多态性标记带具有清晰、可靠、易于分辨的特点，适于用作协优杂交稻及其双亲的区别与鉴定。使用引物ＰＬＤ１２能够将协优６４与其双亲乃至所有供试材料加以区别，使用引物ＰＷＰ１３，可以将协青早Ａ与协青早Ｂ加以区别，结合使用引物ＰＬＣ１１、ＰＬＤ１２和ＰＷＰ１３，则可以将所有供试材料逐一加以区别。
With 500 random primers, we conducted RAPD analysis on the main hybrid combinations of Chinese cabbage and their parents, and found that 28 primers could produce polymorphic differences among the tested materials. Among them, 11 produced by 8 primers The morphological marker band has the characteristics of being clear, reliable and easily distinguishable and suitable for distinguishing and identifying the hybrid rice and its parents. Using Primer PLD12 to distinguish Syphilis from its parents or even all of the tested materials, using Primer PWP13 to differentiate Cystatin A from Cytoplasm B, in combination with the primers PLC11, PLD12 and PWP13, Test materials to be distinguished one by one.