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ARS Home » Southeast Area » Stuttgart, Arkansas » Dale Bumpers National Rice Research Center » Research » Publications at this Location » Publication #333793

Title: Identification of broad spectrum rice blast resistance genes with IRRI Rice monogenic lines

item WANG, JI-CHUN - Jilin Agricultural University
item KIM, DONG-RUN - Shenyang Agricultural University
item WU, XIAN - Jilin Agricultural University
item REN, JIN-PING - Jilin Agricultural University
item LIU, XIAO-MEI - Jilin Agricultural University
item Jia, Yulin
item GAO, ZENG-GUI - Shenyang Agricultural University

Submitted to: Meeting Abstract
Publication Type: Abstract Only
Publication Acceptance Date: 10/2/2016
Publication Date: 10/8/2016
Citation: Wang, J., Kim, D., Wu, X., Ren, J., Liu, X., Jia, Y., Gao, Z. 2016. Identification of broad spectrum rice blast resistance genes with IRRI Rice monogenic lines. Meeting Abstract. 7th IRBC, p81.

Interpretive Summary:

Technical Abstract: Rice blast disease, caused by the fungus Magnaporthe oryzae, is the most destructive rice disease worldwide. This disease is managed with a combination of the use of resistant cultivars, application of fungicides, and improved cultural practices. Among them, the use of resistant cultivars is the most economical and environmentally sound approach to control blast disease. In this report, 218 isolates from commercial rice fields of Northeast China, South Korea, and the Southern USA were collected and used to inoculate 24 monogenic lines carrying 24 major resistance genes, Pia, Pib, Pii, Pik, Pik-s, Pik-h, Pik-m, Pik-p, Pish, Pit, Pita, Pita-2, Piz, Piz-t, Piz-5, Pi1, Pi3, Pi5(t), Pi7(t), Pi9, Pi11(t), Pi12(t), Pi19, and Pi20, and the susceptible recurrent parent Lijiangxintuanhegu (LTH) under greenhouse conditions. About 80% of the isolates collected in Northeast China and South Korea produced resistant reactions on monogenic lines containing of Piz-t, Pi9, and Pi12(t) whereas Pita-2 and Piz-5 containing lines were effective against 80% of the South Korea isolates. However in the Southern USA, 93% and 79% of the isolates resulted in resistant reactions on Pi9 and Pita-2 containing monogenic lines, respectively. These findings suggest that Piz-t, Pi9, and Pi12(t) are effective in areas where blast isolates were collected in northeast China, Piz-t, Pi9, Pi12(t), Pita-2, and Piz-5 are effective in areas of South Korea, and Pi9 and Pita-2 are effective in the Southern USA.