THE GENOMIC IDENTIFICATION OF THE DOMINANT MALE STERILE GENE OF TAIGU WHEAT

In the present study, the crosses and backcrosses were conducted between the male sterile Taigu wheat(Triticum aestiturn)as the female parent and five tetraploid wheats as the male parents. F₁ hybrids segregated in the ratio of sterile plants/fertile plants=1:1 and had the 14Ⅱ+7Ⅰ pairing configuration. All BC₁ of F₁ fertile plants were fertile, but the number of sterile plants in progenies from baekeross of the sterile F, decreased and that of fertile plants incree ased as the times of backcrosses increased.The pairing configuration of sterile BC₃ plants was 14Ⅱ+1Ⅰ, but that of fertile BC₃ plants was 14Ⅱ.When the sterile Taigu wheat was crossed with 3 hexaploid wheats,the fertility in their progenies constantly segregated in the ratio 1:1.The results show that the dominant male sterile gene of Taigu wheat is located on a chromosome of D genome, and the gene can not be directly transterred into a tetranloid wheat, like durum without D genome