| Qinghai Province is one of Chinas over-summering pathogen source areas of wheat stripe rust. To explore the resistance level and the distribution frequency of stripe rust resistance genes of the wheat varieties and germplasm resources in Qinghai Province, the resistance of 208 wheat resources at seedling and adult stages was identified using the physiological race CYR31 and dominant physiological races CYR32, CYR33, CYR34 of wheat stripe rust. The stripe rust resistance genes were detected by gene array. The results showed that 80 wheat varieties(accounting for 38.5% in total) were resistant to CYR31, CYR32, CYR33, and CYR34. Combined with the results of disease resistance identification at the adult stage, 125(accounting for 60.1% in total) materials showed adult plant resistance to stripe rust, 74(accounting for 35.6% in total) materials showed resistance during the whole growth period. The results of molecular detection showed that 204(98.1%), 114(54.8%), 70(33.7%), 66(31.7%), 59(28.4%), 54(26.0%), 45(21.6%), 31(14.9%), 16(7.7%), 1(0.5%), 193(92.8%), 168(80.8%), 147(70.7%), 124(59.6%), 107(51.4%), 86(41.3%), 77(37.0%), 36(17.3%), 26(12.5%), 20(9.6%), and 18(8.7%) materials carried Yr29, Yr78,YrZH58,Yr5, Yr75, Yr80, Yr30, Yr30, Yr26,Yr82, YrSP, QYrqin-2AL,QYr.nwafu-3BS, QYrsn.nwafu-1BL, QYrqin-6BS, QYrxn-1BL, QYrqin-2BL, QYrsn-6BS, QYrsn-2AS, QYrsn-3DL, QYrhm-2BC and QYr-4BL, respectively. This study systematically revealed the current level of disease resistance and the resistance genes carried by wheat germplasm resources in Qinghai Province. It provides a theoretical basis for wheat disease resistance breeding and the rational distribution of disease resistance genes. |
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