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Please use this identifier to cite or link to this item: https://scholars.tari.gov.tw/handle/123456789/18639
Title: Surveillance of Rice Blast Resistance Effectiveness and Emerging Virulent Isolates in Taiwan
Authors: Jauhar Syauqi
Rong-Kuen Chen
An-Hsiu Cheng
Yea-Fang Wu
Chia-Lin Chung
Chun-Chi Lin
Hau-Ping Chou
Hsin-Yuh Wu
Jen-You Jian
Chung-Ta Liao
Chien-Chih Kuo
Sheng-Chi Chu
Yi-Chen Tsai
Dah-Jing Liao 
Yong-Pei Wu 
Abdul Latief Abadi
Liliek Sulistyowati
Wei-Chiang Shen
Keywords: AvrPib;field resistance;IRRI-bred blast-resistant lines;Magnaporthe oryzae;rice blast
Issue Date: Nov-2022
Publisher: American Phytopathological Society
Source: Plant Disease 
Abstract: 
Rice blast caused by Magnaporthe oryzae is a dangerous threat to rice production and food security worldwide. Breeding and proper deployment of resistant varieties are effective and environmentally friendly strategies to manage this notorious disease. However, a highly dynamic and quickly evolved rice blast pathogen population in the field has made disease control with resistance germplasms more challenging. Therefore, continued monitoring of pathogen dynamics and application of effective resistance varieties are critical tasks to prolong or sustain field resistance. Here, we report a team project that involved evaluation of rice blast resistance genes and surveillance of M. oryzae field populations in Taiwan. A set of International Rice Research Institute-bred blast-resistant lines (IRBLs) carrying single blast resistance genes was utilized to monitor the field effectiveness of rice blast resistance. Resistance genes such as Ptr (formerly Pita2) and Pi9 exhibited the best and most durable resistance against the rice blast fungus population in Taiwan. Interestingly, line IRBLb-B harboring the Pib gene with good field protection has recently shown susceptible lesions in some locations. To dissect the genotypic features of virulent isolates against the Pib resistance gene, M. oryzae isolates were collected and analyzed. Screening of the AvrPib locus revealed that the majority of field isolates still maintained the wild-type AvrPib status but eight virulent genotypes were found. Pot3 insertion appeared to be a major way to disrupt the AvrPib avirulence function. Interestingly, a novel AvrPib double-allele genotype among virulent isolates was first identified. Pot2 repetitive element-based polymerase chain reaction (rep-PCR) fingerprinting analysis indicated that mutation events may occur independently among different lineages in different geographic locations of Taiwan. This study provides our surveillance experience of rice blast disease and serves as the foundation to sustain rice production.
URI: https://apsjournals.apsnet.org/doi/10.1094/PDIS-12-21-2806-RE
https://scholars.tari.gov.tw/handle/123456789/18639
ISSN: 0191-2917
DOI: 10.1094/PDIS-12-21-2806-RE
Appears in Collections:SCI期刊

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