Open AccessIdentification, Chromosome Location, and Diagnostic Markers for a New Gene (YrCN19) for Resistance to Wheat Stripe Rust
Author(s) -
Peigao Luo,
Z. L. Ren,
H. Q. Zhang,
H. Y. Zhang
Publication year - 2005
Publication title -
phytopathology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.264
H-Index - 131
eISSN - 1943-7684
pISSN - 0031-949X
DOI - 10.1094/phyto-95-1266
Subject(s) - biology , microsatellite , genetics , gene , stripe rust , genetic marker , cultivar , chromosome , rust (programming language) , molecular marker , common wheat , primer (cosmetics) , stem rust , plant disease resistance , botany , allele , chemistry , organic chemistry , computer science , programming language
Several wheat lines and cultivars of wheat (Triticum aestivum) originating from the southwestern region of China were found to be highly resistant to stripe rust by inoculation with the prevalent races (CYR30, CYR31, and CYR32) and newly emerged races (H46-4, SY11-4 and SY11-14) of the pathogen. An inheritance study of the resistance to stripe rust was carried out by crossing resistant AIM6 with susceptible BeiZ76. Results indicated that the resistance to stripe rust was controlled by a single dominant gene. The 112 F 2 plants chosen from the cross BeiZ76/ AIM6 were analyzed with 218 pairs of microsatellite primers to determine the map location of the resistance gene. A simple sequence repeat marker on chromosome arm 2BS, Xgwm410, showed polymorphism and co-segregation between stripe rust resistant and susceptible plants. From the pedigree, inheritance, molecular marker, and resistance response, it is concluded that the stripe rust resistance gene in wheat cv. Chuan-nong19 (CN19) and wheat lines AIM5 and AIM6 is a novel gene, designated YrCN19. The microsatellite primer Xgwm410 is a diagnostic marker of the resistance gene YrCN19, which has potential for application in the marker-assisted breeding of wheat.