Phylogenetic diversity and sensitivity to MBI and QoI fungicides of Magnaporthe oryzae in Taiwan

Magnaporthe oryzae (Anamorph: Pyricularia oryzae), the causal agent of rice blast disease, is the major pathogen that reduces the yield of rice worldwide. Melanin biosynthesis inhibitors (MBIs) and strobilurins (QoIs) are common fungicides used to control the disease. One hundred and three M. oryzae...

Full description

Saved in:
Bibliographic Details
Published in:Journal of Pesticide Science 2013/11/20, Vol.38(4), pp.194-199
Main Authors: Hsieh, Chien-Hsiang, Chung, Wen-Chuan, Chen, Yi-Nian, Chung, Wen-Hsin
Format: Article
Language:English
Subjects:
cytochrome b (cyt b) gene
MBIs
Molecular phylogeny
QoIs
Citations: Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:Magnaporthe oryzae (Anamorph: Pyricularia oryzae), the causal agent of rice blast disease, is the major pathogen that reduces the yield of rice worldwide. Melanin biosynthesis inhibitors (MBIs) and strobilurins (QoIs) are common fungicides used to control the disease. One hundred and three M. oryzae isolates from different rice-production areas in Taiwan were evaluated for their molecular phylogeny and sensitivity to MBI and QoI fungicides. Molecular phylogenetic analysis showed that all M. oryzae isolates could be classified into nine genetic groups (A–I) based on the DNA polymorphism amplified by CNS1/MP primers. Predominant ones are groups A (72 isolates) and B (15 isolates). Fungicide tests showed that M. oryzae isolates were sensitive to MBIs (carpropamid and tricyclazole) and less sensitive to QoIs (kresoxim-methyl and azoxystrobin). Amplifying the cytochrome b (cyt b) gene revealed that isolates with low sensitivity to QoIs did not correspond with mutation at codon 129 or 143 in the cyt b gene.
ISSN:1348-589X
1349-0923
DOI:10.1584/jpestics.D12-059