以毒麦、田毒麦、多花黑麦草、多年生黑麦草、硬直黑麦草、高羊茅与狗牙根等禾本科的7种植物为材料,拟采用DNA测序、特异性位点比对、种间遗传距离测定、建立系统树等分析候选DNA条形码psb A-trn H鉴别黑麦草属常见植物的能力。实验结果表明,以psb A-trn H为DNA条形码时,建立的系统发育树能较好区分毒麦和田毒麦与其他几种植物。psb A-trn H序列可以作为黑麦草属植物的潜在条形码。 Seven species of gramineous plants such as poisonous wheat, Toxicidae, ryegrass, perennial ryegrass, hardy ryegrass, tall fescue and bermudagrass were used as materials, and DNA sequencing, specific loci alignment, Determination of genetic distance, the establishment of phylogenetic tree analysis of candidate DNA barcodes psb A-trn H identification of common plant ryegrass ability. The experimental results showed that the phylogenetic tree established by psb A-trn H DNA barcode could discriminate between wheat and wheat and other plants. The psb A-trn H sequence can be used as a potential barcode for ryegrass.