In genetics, the advent of molecular markers enables the dissection of a complex trait into a number of quantitative trait loci (QTL), and assists the transfer of these QTL into desired cultivars or lines.

• DNA分子标记可把复杂的数量性状分解成若干个数量性状位点(quantitative trait loci,QTL)的效应,并将QTL转入到栽培品系中去。