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ARS Home » Pacific West Area » Pullman, Washington » WHGQ » Research » Publications at this Location » Publication #412200
Research Project: Enhancing Control of Stripe Rusts of Cereal Crops

Location: Wheat Health, Genetics, and Quality Research

Title: Virulence characterization wheat strip rust population in China in 2023

Author
item ZHANG, XINZONG - Institute Of Plant Protection - China
item HUANG, LIANG - Institute Of Plant Protection - China
item TANG, WANQIANG - Southwest University Of Science And Technology
item QIU, AGE - Southwest University Of Science And Technology
item LI, XIN - Southwest University Of Science And Technology
item ZHOU, X - Southwest University Of Science And Technology
item YANG, SUIZHUANG - Southwest University Of Science And Technology
item WANG, MEINAN - Washington State University
item Chen, Xianming
item CHEN, WANQUAN - Institute Of Plant Protection - China
item LIU, TAI-GUO - Institute Of Plant Protection - China
item XIA, CHONGJING - Institute Of Plant Protection - China

Submitted to: Plant Pathology
Publication Type: Peer Reviewed Journal
Publication Acceptance Date: 9/29/2024
Publication Date: 10/21/2024
Citation: Zhang, X., Huang, L., Tang, W., Qiu, A., Li, X., Zhou, X.L., Yang, S., Wang, M., Chen, X., Chen, W., Liu, T., Xia, C. 2024. Virulence characterization wheat strip rust population in China in 2023. Plant Pathology. 2025(74):363-377. https://doi.org/10.1111/ppa.14023.
DOI: https://doi.org/10.1111/ppa.14023

Interpretive Summary: Wheat stripe rust is one of the major diseases reducing wheat production worldwide, especially China. Monitoring the virulence of the pathogen populations is important for the prevention and control of the disease. In this study, 18 Yr single-gene lines were used to characterize the virulence of the 2023 stripe rust collections in China. From 103 isolates collected from eleven provinces, 61 races were identified. Frequencies of virulence factors to the 18 Yr genes varied from 0 to 95.1%, with low frequencies (<10%) to Yr85 (7.8%) and Yr10 (8.7%); moderate frequencies (10 to 40%) to Yr24 (15.5%), Yr32 (16.5%), YrSP (37.9%), and Yr76 (37.9%); and high frequencies (>40%) to Yr7 (47.6%), Yr1 (68.0%), Yr9 (69.9%), Yr27 (69.9%), Yr17 (79.6%), Yr6 (89.3%), YrExp2 (92.2%), Yr43 (93.2%), Yr8 (95.1%), and Yr44 (95.1%). None of the isolates were virulent to Yr5 and Yr15, indicating that these two resistance genes are still effective against the rust populations in China. The isolates had a broad virulence spectrum, ranging from 3 to 16 virulence factors with an average of 9.5. Comparison of the rust races identified in 2023 with those in 2021 revealed that the PstCN-040 race group (with virulence to Yr1, Yr6, Yr7, Yr8, Yr9, Yr17, Yr43, Yr44, and YrExp2) was the most predominant. This study provides valuable information for monitoring the virulence structure of the stripe rust populations, guiding wheat breeding for resistance and control of stripe rust.

Technical Abstract: Wheat stripe rust, caused by Puccinia striiformis f. sp. tritici (Pst), is one of the major diseases reducing wheat production worldwide, especially China. Monitoring the virulence of Pst populations is important for the prevention and control of the disease. In this study, 18 Yr single-gene lines were used to characterize the virulence of the 2023 Pst collections in China. From 103 isolates collected from eleven provinces, 61 races were identified. Frequencies of virulence factors to the 18 Yr genes varied from 0 to 95.1%, with low frequencies (<10%) to Yr85 (7.8%) and Yr10 (8.7%); moderate frequencies (10 to 40%) to Yr24 (15.5%), Yr32 (16.5%), YrSP (37.9%), and Yr76 (37.9%); and high frequencies (>40%) to Yr7 (47.6%), Yr1 (68.0%), Yr9 (69.9%), Yr27 (69.9%), Yr17 (79.6%), Yr6 (89.3%), YrExp2 (92.2%), Yr43 (93.2%), Yr8 (95.1%), and Yr44 (95.1%). None of the isolates were virulent to Yr5 and Yr15, indicating that these two resistance genes are still effective against the Pst populations in China. The Pst isolates hada broad virulence spectrum ranging from 3 to 16 virulence factors with an average of 9.5. Comparison of the Pst races identified in 2023 with those in 2021 revealed that the PstCN-040 race group (with virulence to Yr1, Yr6, Yr7, Yr8, Yr9, Yr17, Yr43, Yr44, and YrExp2) was the most predominant. This study provides valuable information for monitoring the virulence structure of the Pst populations, guiding wheat breeding for resistance and control of stripe rust.