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Physiological Race Profile of Xanthomonas oryzae pv. oryzae Isolated from the Rice Ecosystem in Chiang Rai Province |
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| รหัสดีโอไอ | |
| Creator | Pairoh Khwanngam |
| Title | Physiological Race Profile of Xanthomonas oryzae pv. oryzae Isolated from the Rice Ecosystem in Chiang Rai Province |
| Contributor | Luksorn Tumariya, Thitima Chintaganon, Dany Thongkham, Jutatape Watcharachaiyakup, Sujin Patarapuwadol |
| Publisher | Department of Agriculture |
| Publication Year | 2567 |
| Journal Title | Thai Agricultural Research Journal |
| Journal Vol. | 42 |
| Journal No. | 1 |
| Page no. | 24-36 |
| Keyword | bacterial leaf blight, Xanthomonas oryzae pv. Oryzae, physiological race, diversity |
| URL Website | tci-thaijo.org/index.php/thaiagriculturalresearch |
| Website title | Thai Agricultural Research Journal |
| ISSN | 3027-7272 |
| Abstract | This study investigated the diversity and distribution of the bacterial leaf blight (BLB) pathogen, Xanthomonas oryzae pv. oryzae (XOO) population in the diverse rice ecosystem of Chiang Rai province, Thailand. A total 274 XOO isolates were collected during 2016 to 2019 from 18 surveyed districts in the province. Representative isolates of each district were selected and physiological race analysis conducted on 11 near isogenic lines (NILs) with single BLB resistance genes. A total of 47 physiological races of XOO were identified, with the highest number of races found in Phan (26 races) and Chiang Saen (20 races). Rice with the xa5 resistance gene had broad-spectrum resistance to the pathogen population (76.3%), followed by Xa7 (62.4%), Xa21 (33.6%), and Xa11 (31.4%). Most of the isolates were in race 8 (SSSRRSSSSSS) (27.37%), followed by race 27 (SSSRRSSSSSR) (12.41%), and race 17 (SSSSSSSRRSS) (10.22%). Sixteen races were found to be able to infect NILs with the xa5 gene, and these isolates were isolated from rice varieties RD6 and KDML 105 in Phan and Chiang Saen districts. The 47 races were grouped into three clusters based on the similarity coefficient of the reaction response on rice with BLB resistance genes. The number of isolates and the effective controlling gene in cluster 1, 2, and 3 were 74 (xa5), 170 (xa5), and 30 (xa5 and Xa7) isolates, respectively. This study provides valuable information on the diversity and distribution of XOO races in Chiang Rai province, which can be used to manage new rice resistant cultivars for a sustainable controlling of BLB. |
