中文摘要：

小麦ph1b突变体可诱导部分同源染色体配对和交换,产生遗传上较为稳定、补偿性较好的重组体。将外源染色体引入ph1b的小麦遗传背景是产生目标染色体重组体的基础,但ph1b植株没有明显而稳定的表型性状,难以从表型上进行选择。本研究利用CSph1b缺失区中的分子标记Mads及外源染色体特异的分子标记P4和P68,对小麦-中间偃麦草2Ai-2（2B）异代换系N420与CSph1b的杂种F2群体及其衍生的F5株系进行ph1b-2Ai-2染色体综合体的选择,高效地获得了目标基因型。

英文摘要：

Incident of homeologous chromosome pairing and exchange often occur in hexaploid wheat with ph1b genetic background which can produce compensable and genetic stable recombinants.Therefore,transferring alien chromosomes into a wheat material with ph1b background is the basis of generating translocations between the target chromosomes.However,it is difficult to identify ph1b genotype according to its phenotype.In present study,some target plants with ph1b and the alien chromosome 2Ai-2 were selected effectively by using molecular markers Mads（on the deletion region of ph1b） for ph1b,P4 and P68（on the alien chromosome） for 2Ai-2 in the F2 population of CSph1b crossed with N420,a wheat-Thinopyrum intermedium 2B（2Ai-2）substitution line,and their derivative F5lines.