HUI Jian
Agricultural Bio-Technology Centre, Ningxia Academy of Agriculture and Forestry SciencesBAI Hai-bo
Agricultural Bio-Technology Centre, Ningxia Academy of Agriculture and Forestry SciencesMA Si-shuang
Agricultural Bio-Technology Centre, Ningxia Academy of Agriculture and Forestry SciencesCHEN Xiao-jun
Agricultural Bio-Technology Centre, Ningxia Academy of Agriculture and Forestry SciencesLYU Xue-lian
Agricultural Bio-Technology Centre, Ningxia Academy of Agriculture and Forestry SciencesLI Shu-hua
Agricultural Bio-Technology Centre, Ningxia Academy of Agriculture and Forestry SciencesAgricultural Bio-Technology Centre, Ningxia Academy of Agriculture and Forestry Sciences
National Natural Science Foundation of China (31660394, 31960428),Ningxia Hui Autonomous Region Natural Science Foundation of China (2019AAC03151, 2018AAC3189),Ningxia Hui Autonomous Region Agricultural Breeding Program (2018NYYZ0202),Ningxia Youth Talents Supporting Program (TJGC2019074)
This study reported a quantitative trait locus (QTL) mapping for identifying the adult-stage powdery mildew resistance genes in a recombinant inbred line (RIL) population of common wheat (Triticum aestivum L.). This population was derived from the highly susceptible variety Ningchun 4 crossing with the highly resistant variety Ningchun 27, and genotyped using genotyping-by-sequencing (GBS) approach. The results showed that the additive-epistatic genetic model using four pairs of major genes was suitable for identifying the powdery mildew resistance loci. Two resistance-conferring loci QPm.naafs-4D and QPm.naafs-7D have been identified from Ningchun 27 and Ningchun 4, respectively. Out of them, QPm.naafs-4D represented a LOD value of 5.9 to 15.4 at multiple environmental conditions (additive effects: -1.1 to -1.2), and contributed to a phenotypic variation of 18.6% to 34.5%. This locus was delimited to a genetic distance of 4 cM harboring the durable poly-resistance gene Pm46/Lr67/Yr46/Sr55. Sequence analysis confirmed that QPm.naafs-4D in Ningchun 27 was identical to Pm46/Lr67/Yr46/Sr55. The resistance-conferring donor line is valuable in marker-assisted breeding for powdery mildew resistance in wheat.