@article{Kong2026, 
author = {Dehui Kong and Yiming Chen and Linghan Wang and Xiao Li and Miaomiao Shi and Zijun Ding and Mingxing Wen and Chengzhi Jiao and Li Sun and Zongkuan Wang and Wei Wang and Xinru Fei and Hong Guo and Bingjian Sun and Haiyan Wang and Jin Xiao and Xiu’e Wang},
title = {Fine mapping of Wheat yellow mosaic virus resistance gene Ym5 and its application in breeding},
year = {2026},
journal = {The Crop Journal},
volume = {14},
number = {4},
pages = {1298-1307},
keywords = {WYMV, Disease resistance, Gene mapping, Alien introgression, Molecular markers},
url = {https://www.sciopen.com/article/10.1016/j.cj.2026.03.023},
doi = {10.1016/j.cj.2026.03.023},
abstract = {Wheat yellow mosaic virus (WYMV) poses a significant threat to global autumn-sown wheat production. Growing wheat varieties with WYMV resistance is the most effective strategy for disease control. In this study, we fine-mapped a major WYMV resistance gene Ym5 (previously designated as QYm.njau-5A.1) in the Japanese wheat variety Xifeng. We delimited Ym5 to a 4.6 Mb linkage block (534.6–539.2 Mb in chromosome 5A) by genome-wide association study of 266 wheat accessions (excluding those carrying Ym1). Comparative genomic analyses revealed that resistant haplotypes, shared by Xifeng and European line ArinaLrFor, represent a putative alien introgression from Triticum monococcum. Twelve InDel and one KASP markers were developed and confirmed as diagnostic. Twenty-four recombinants were identified from a Xifeng × Yangmai 158 F2 population consisting of 6882 individuals, and Ym5, flanked by markers ARI_106 and ARI_218, was narrowed down to a 1.1 Mb interval (534.8–535.9 Mb in ArinaLrFor). The use of Ym5 in Chinese breeding programs was traced to two sources: Xifeng and Australian variety Quality. Further investigation showed Ym5 introgression conferred no obvious yield penalty.}
}