A new gene for stripe rust resistance of Wheat Landraces was found and mapped by the Plant Protection Institute of Chinese Academy of Agricultural Sciences
By: Date: 2022-07-19 Categories: foodtechnology Tags: ,
Recently, the innovative team of fungal diseases of grain crops of the Institute of plant protection, Chinese Academy of Agricultural Sciences published a research paper entitled”identification and molecular mapping of yrbm for adult plant resistance to Stripe Rust in Chinese Wheat Landrace baimangmai” in the well-known journal theoretical and applied genetics in the field of genetics, A new adult stripe rust resistance gene yrbm was found and mapped in the local wheat variety”white awn wheat” in China.
 
Wheat stripe rust is prevalent and broke out in different degrees every year in all wheat regions of China. Breeding and widely planting disease resistant varieties is the most economical and effective measure to achieve sustainable prevention and control of stripe rust. However, due to the high variation of pathogenicity in Puccinia striiformis f.sp. tritici population, the continuous replacement of dominant new races and the single utilization of stripe rust resistance genes of main varieties, excellent varieties have been widely promoted in production. 3? Rust resistance began to”lose” in 5 years. In this study, new suggestions on the layout of wheat stripe rust resistance genes were put forward, and attention was paid to the exploration and utilization of new adult stripe rust resistance genes in wheat disease resistance breeding. The local variety”white awn wheat” was originally collected in Qingyang City, Gansu Province, where stripe rust is often prevalent. Since 2006, it has been identified in disease nurseries in Gansu, Sichuan, Hubei and other disease endemic areas for 15 consecutive years. It is highly resistant to stripe rust at the adult stage, has the potential of lasting resistance to stripe rust, and the resistance level is stable and not affected by environmental temperature conditions.
 
Lin Ruiming et al. Hybridized”white awn wheat” with susceptible varieties”Mingxian 169″ and”Taichung 29″, and constructed F1, bc1f1, F2, RIL F10 and other genetic populations with different genetic backgrounds. Through genetic analysis of the disease resistance basis of white awn wheat, it was clear that its disease resistance was controlled by a main effect locus, named yrbm; Using wheat microsatellite markers and transcriptome sequencing, the linked molecular markers xgpw7272189 and xwmc652164 located on the 4bL chromosome were obtained; Through allelic analysis, resistance spectrum difference analysis and molecular marker detection, it is clear that yrbm is a new stripe rust resistance gene. Yrbm vector strains have been provided to breeding units in Sichuan, Gansu and other places, providing a new source of resistance for wheat stripe rust resistance breeding.
 
Hu Chaoyue, a postgraduate student jointly trained by the Institute of plant protection of the Chinese Academy of Agricultural Sciences and Yangtze University, and Wang Fengtao, a member of the innovation team of”grain crop fungal diseases”, are the co first authors of the paper, and Lin Ruiming is the corresponding author of the paper. This research is supported by the general project of the National Natural Science Foundation of China (31871949; 31871923).
 
Original link:https://link. springer. com/article/10.1007/s00122-022-04139-3