Analysis of host species specificity of Magnaporthe grisea toward wheat using a genetic cross between isolates from wheat and foxtail millet

被引：70

作者：

Murakami, J ^{[1
]}

Tosa, Y ^{[1
]}

Kataoka, T ^{[1
]}

Tomita, R ^{[1
]}

Kawasaki, J ^{[1
]}

Chuma, I ^{[1
]}

Sesumi, Y ^{[1
]}

Kusaba, M ^{[1
]}

Nakayashiki, H ^{[1
]}

Mayama, S ^{[1
]}

机构：

[1] Kobe Univ, Fac Agr, Kobe, Hyogo 6578501, Japan

来源：

PHYTOPATHOLOGY | 2000年 / 90卷 / 10期

关键词：

aggressiveness; Pyricularia;

D O I：

10.1094/PHYTO.2000.90.10.1060

中图分类号：

Q94 [植物学];

学科分类号：

071001 ;

摘要：

A genetic cross was performed between a Setaria isolate (pathogenic on foxtail millet) and a Triticum isolate (pathogenic on wheat) of Magnaporthe grisea to elucidate genetic mechanisms of its specific parasitism toward wheat. A total of 80 F(1) progenies were obtained from 10 mature asci containing 8 ascospores. Lesions on wheat leaves produced by the Fl progenies were classified into four types, which segregated in a 1:1:1:1 ratio. This result suggested that the pathogenicity of the F(1) population on wheat was controlled by two genes located at different loci. This idea was supported by backcross analyses. We designated these loci as Pwt1 and Pwt2. Cytological analyses revealed that Pwt1 and Pwt2 were mainly associated with the hypersensitive reaction and papilla formation, respectively.

引用

页码：1060 / 1067

页数：8