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传统育种中已经利用等位基因的重组及超亲分离现象使作物得到了持续的改良。生物技术又为遗传变异的产生、识别、鉴定及操作提供了新方法。用ＤＮＡ标记进行的标记辅助选择（ＭＡＳ）也已被用于作物改良。然而，ＭＡＳ的应用需要图位、控制重要性状的基因的育种值等信息，这就限制了它的应用。禾本科作物之间的比较遗传分析可以促进对控制特定性状的基因顺序的鉴定和定位。基因顺序的数据库将允许直接发现高等植物中的基因，并允许对育种种质中存在的等位基因进行分类。对控制某个性状的基因的鉴定以及对其ＤＮＡ顺序的了解，对于根据基因指纹或关键ＤＮＡ顺序的鉴定来对种质库内的变异进行分类有促进作用。对某个目标位点上顺序变体的分类会大大降低测定其相关育种值所需要的工作量，并有助于对优良等位基因的鉴定。将等位基因直接选择与传统选择相结合，会更快更准确地改良群体及育种品系。通过种间遗传信息的传递、高效基因的鉴定以及集中注意力于重要基因和主要性状，可以将现行技术的限制因素减到最小程度。
In traditional breeding, the crop has been continuously improved using the recombination and trans-parent segregation of alleles. Biotechnology also provides a new method for the generation, identification, identification and manipulation of genetic variation. Marker Assisted Selection (MAS) using DNA markers has also been used for crop improvement. However, the application of MAS requires map bits, information on the breeding value of genes controlling important traits, which limits its usefulness. Comparative genetic analysis between grasses can facilitate the identification and location of the genetic sequences that control particular traits. Databases of gene sequences will allow direct discovery of genes in higher plants and allow the classification of alleles present in breeding germplasm. The identification of genes controlling a trait and their understanding of the DNA sequence contributes to the classification of variations in the genebank based on fingerprinting or identification of key DNA sequences. The classification of sequence variants at a target site will greatly reduce the amount of work required to determine their associated breeding values and will contribute to the identification of good alleles. Combining direct allele selection with traditional selection will improve population and breeding lines faster and more accurately. The transmission of interspecies genetic information, the identification of highly efficient genes and the focus on important genes and major traits can minimize the limitations of current technologies.