国立研究開発法人 国際農林水産業研究センター | JIRCAS

A Set of Standard Differential Blast Isolates (<I>Magnaporthe grisea</I> (Hebert) Barr.) from the Philippines for Rice (<I>Oryza sativa</I> L.) Resistance

JARQ : Japan Agricultural Research Quarterly
ISSN
00213551
書誌レコードID(総合目録DB)
AA0068709X
本文フルテキスト

A total of 119 blast (Magnaporthe grisea (Hebert) Barr.) isolates collected from the Philippines, were characterized for their pathogenicities using 19 rice (Oryza sativa L.) differential varieties (DVs) targeting for 18 resistance genes. These isolates were classified into 31 groups based on the reaction patterns to 9 DVs for targeting 9 resistance genes, Pia, Pib, Pii, Pit, Pita, Pish, Piz-t, Pi3, and Piz-5, at first, and then further divided into 70 pathotypes considering the reaction pattern of the other 9 DVs for the other resistance genes, Pik, Pik-h, Pik-m, Pik-p, Pik-s, Pita-2, Piz, Pi1, and Pi20(t). Twenty isolates that have differentiating ability, stable reactions and good sporulating ability were selected. The reactions of these isolates were confirmed using the monogenic lines as a set of DVs for targeting 24 resistance genes, Pia, Pib, Pii, Pik, Pik-h, Pik-m, Pik-p,Pik-s, Pish, Pit, Pita, Pita-2, Piz, Piz-t, Piz-5, Pi1, Pi3, Pi5(t), Pi7(t), Pi9(t), Pi11(t), Pi12(t), Pi19(t), and Pi20(t). Several resistance alleles of Pik locus, Pik, Pik-h, Pik-m, and Pik-p, and Pi1 had the same reaction patterns and could not be differentiated by these selected blast isolates. No avirulent isolate for Pit and Pi19 was found. The three genes, Pish, Piz-5, and Piz, showed a wide spectrum of moderate resistances to these isolates. These findings suggested the existence of a wide variation of blast pathogens in the Philippines. This information on pathogenicity of blast isolates from the Philippines will be also useful to understand the differentiation and relationship between blast races and resistance genes. The monogenic lines as the DVs and the selected 20 blast isolates can be used as the first differential system, which can characterize the resistances of rice varieties and pathogenicities of blast isolates in the tropics.

刊行年月2008-01-01
作成者TELEBANCO-YANORIA Mary JeanieIMBE TokioKATO HiroshiTSUNEMATSU HiroshiEBRON Leodegario A.VERA CRUZ Casiana M.KOBAYASHI NobuyaFUKUTA Yoshimichi
著者キーワード

differential system

diversity

pathogenicity

resistance gene

公開者Japan International Research Center for Agricultural Sciences
データ作成日2008-01-01
国立情報学研究所メタデータ主題語彙集(資源タイプ)Journal Article
42
1
開始ページ23
終了ページ34
DOI10.6090/jarq.42.23
権利Japan International Research Center for Agricultural Sciences
言語eng