国立研究開発法人 国際農林水産業研究センター | JIRCAS

Mapping of a QTL for Field Resistance to Blast (<i>Pyricularia oryzae</i> Cavara) in Ingngoppor-tinawon, a Rice (<i>Oryza sativa </i>L.) Landrace from the Philippines

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

Rice blast, caused by Pyricularia oryzae Cavara (Magnaporthe grisea (Hebert) Barr), is one of the most severe global rice diseases. The Philippine rice landrace ‘Ingngoppor-tinawon’ (IT) displays not only high field resistance to rice blast but also high tolerance to lodging, despite its very long culms. These characteristics make IT suitable for use in breeding animal feed varieties as whole-crop silage (WCS). To characterize the blast resistance of IT, quantitative trait locus (QTL) analysis of the resistance using simple sequence repeat (SSR) markers was conducted in F3 progenies derived from crossing IT with a susceptible lowland variety, ‘Koshihikari’. A QTL for blast field resistance (qBFR4) was identified on chromosome 4, and the resistance allele was derived from IT. The QTL explained 73.5% of the phenotypic variation for blast resistance. qBFR4 mapped to almost the same position as that of the blast field-resistance gene Pi39. Inoculation assays revealed that IT (containing qBFR4) showed resistance characteristics that differed from those of Mineharuka (containing Pi39), making it very likely that resistance derived from IT is distinct from Pi39. IT showed broad resistance to Japanese isolates and race-specific resistance to some Philippine isolates.

刊行年月2014-10-01
作成者MIZOBUCHI RitsukoSATO HiroyukiFUKUOKA ShuichiYAMAMOTO ShinichiKAWASAKI-TANAKA AkikoFUKUTA Yoshimichi
著者キーワード

rice breeding

SSR marker

quantitative trait loci

公開者Japan International Research Center for Agricultural Sciences
データ作成日2014-10-01
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
48
4
開始ページ425
終了ページ431
DOI10.6090/jarq.48.425
権利Japan International Research Center for Agricultural Sciences
言語eng