Rice Pi-ta gene confers resistance to the major pathotypes of the rice blast fungus in the United States

被引:80
作者
Jia, YL [1 ]
Wang, ZH
Fjellstrom, RG
Moldenhauer, KAK
Azam, MA
Correll, J
Lee, FN
Xia, YW
Rutger, JN
机构
[1] USDA ARS, Dale Bumpers Natl Rice Res Ctr, Stuttgart, AR 72160 USA
[2] Zhejiang Univ, Inst Nucl Agr Sci, Hangzhou 310029, Peoples R China
[3] USDA ARS, Rice Res Unit, Beaumont, TX 77713 USA
[4] Univ Arkansas, Rice Res & Extens Ctr, Stuttgart, AR 72160 USA
[5] Bangladesh Inst Nucl Agr, Mymensingh 2200, Bangladesh
[6] Univ Arkansas, Dept Plant Pathol, Fayetteville, AR 72701 USA
关键词
oryza sativa; pyricularia;
D O I
10.1094/PHYTO.2004.94.3.296
中图分类号
Q94 [植物学];
学科分类号
071001 ;
摘要
The Pi-ta gene in rice prevents the infection by Magnaporthe grisea strains containing the AVR-Pita avirulence gene. The presence of Pi-ta in rice cultivars was correlated completely with resistance to two major pathotypes. IB-49 and IC-17, common in the U.S. blast pathogen population. The inheritance of resistance to IC-17 was investigated further using, a marker for the resistant Pi-ta allele in an F-2 population of 1,345 progeny from a cross of cv. Katy with experimental line RU9101001 possessing and lacking, respectively, the Pi-ta resistance gene. Resistance to IC-17 was conferred by a single dominant gene and Pi-ta was not detected in Susceptible individuals. A second F-2 Population of 377 individuals from a reciprocal cross between Katy and RU9101001 was used to verify the conclusion that resistance to IC-17 was conferred by a single dominant gene. In this cross. individuals resistant to IC-17 also were resistant to IB-49. The presence of Pi-ta and resistance to IB-49 also was correlated with additional crosses between 'Kaybonnet' and 'M-204'. which also possess and lack Pi-ta, respectively. A pair of primers that specifically amplified a susceptible pi-ta allele was developed to verify the absence of Pi-ta. We suggest that Pi-la is responsible for resistance to IB-49 and IC-17 and that both races contain AVR-Pita genes.
引用
收藏
页码:296 / 301
页数:6
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