普通小麦(Triticum aestivum)有A、B、D三个染色体组。不少人认为,A染色体组来源于一粒小麦系(Einkorn)中的野生一粒小麦(Triticum boeoticum)或其衍生种栽培一粒小麦(Triticum monococcum),D染色体组来源于节节麦[Triticum tausc-hii(Aegilops squarrosa)],而B染色体组来源问题意见尚不一致。根据前人对野生一粒小麦及栽培一粒小麦的研究结果来看,二者的染色体组型是否相似,结论尚不一致。有的认为栽培一粒小麦具有一对随体染色体,而野生一粒小麦则不具随体染色体; Triticum aestivum has A, B, D three chromosomal groups. Many people think that the A genome is derived from a wheat (Triticum boeoticum) or a derivative of Triticum monococcum in Einkorn. The D genome is derived from Triticum tausc-hii (Aegilops squarrosa)], while the source of the B genome is still not consistent. According to the results of previous studies on a wild wheat and cultivated a wheat, the two chromosomes are similar, the conclusion is not consistent. Some think cultivation of a wheat has a pair of satellite chromosomes, while a wild wheat does not have a satellite chromosome;