突变体是遗传学研究的基本材料. 利用突变体克隆水稻基因, 并进而研究基因的生物学功能是水稻功能基因组学的重要研究内容. T-DNA标签法是众多克隆植物基因方法的一种. 其优点是一旦确定突变性状由 T-DNA 插入引起, 就可以通过测定 T-DNA的旁侧序列而快速分离到相应的突变基因. Mutants are the basic materials in genetic research, and cloning rice genes by mutants and further studying their biological functions are important functional genomics studies in rice. T-DNA labeling is one of the many methods for cloning plant genes. The advantage is that once the mutant trait is identified as being caused by T-DNA insertion, the corresponding mutant gene can be quickly isolated by measuring the flanking sequence of the T-DNA.