Abstract: Six uniculm plant lines, which had many natural tillers but only the main stem could come into being spike, were found from the offspring of hybridizations of the variety Fukuho and A. cristatum. The result of GISH showed these uniculm plant lines belonged to the translation lines between two couple wheat chromosomes and A. cristatum chromosomes. Total six translational markers were detected by using SSR analysis in them, which showed that a few chromosome sequences were translated from A. cristatum to Fukuho. The F1 plants of the uniculm wheat X the natural variety Jing 4841 were all natural in modality, but the ratio between natural plants and not was 3:1 in the F2 generation. This showed that the gene which decided the earing number was recessive single gene.

Key words: common wheat(Triticum aestivum L), Agropyron cristatum, uniculm, translation line, recessive gene