Identification of genes contributing to quantitative disease resistance in rice.
Despite the importance of quantitative disease resistance during a plant's life, little is known about the molecular basis of this type of host-pathogen interaction, because most of the genes underlying resistance quantitative trait loci (QTLs) are unknown. To identify genes contributing to resistance QTLs in rice, we analyzed the colocalization of a set of characterized rice defense-responsive genes and resistance QTLs against different pathogens. We also examined the expression patterns of these genes in response to pathogen infection in the parents of the mapping populations, based on the strategy of validation and functional analysis of the QTLs. The results suggest that defense-responsive genes are important resources of resistance QTLs in rice. OsWRKY45-1 is the gene contributing to a major resistance QTL. NRR, OsGH3-1, and OsGLP members on chromosome 8 contribute alone or collectively to different minor resistance QTLs. These genes function in a basal resistance pathway or in major disease resistance gene-mediated race-specific pathways.
National Key Laboratory of Crop Genetic Improvement, National Center of Plant Gene Research (Wuhan), Huazhong Agricultural University, Wuhan 430070, China.
YanJun
Y
Kou
XiangHua
X
Li
JingHua
J
Xiao
ShiPing
S
Wang
D001483:Base Sequence; D002874:Chromosome Mapping / Q000379:methods; D015870:Gene Expression; D054884:Host-Pathogen Interactions; D007113:Immunity, Innate / Q000235:genetics*; D008969:Molecular Sequence Data; D012275:Oryza / Q000235:genetics* / Q000276:immunology; D010935:Plant Diseases / Q000235:genetics / Q000276:immunology; D040641:Quantitative Trait Loci; D017422:Sequence Analysis, DNA