title: Genetic analysis and QTL detection for resistance to white tip disease in rice.
abstract: The inheritance of resistance to white tip disease (WTDR) in rice (Oryza sativa L.) was analyzed with an artificial inoculation test in a segregating population derived from the cross between Tetep, a highly resistant variety that was identified in a previous study, and a susceptible cultivar. Three resistance-associated traits, including the number of Aphelenchoides besseyi (A. besseyi) individuals in 100 grains (NA), the loss rate of panicle weight (LRPW) and the loss rate of the total grains per panicle (LRGPP) were analyzed for the detection of the quantitative trait locus (QTL) in the population after construction of a genetic map. Six QTLs distributed on chromosomes 3, 5 and 9 were mapped. qNA3 and qNA9, conferring reproduction number of A. besseyi in the panicle, accounted for 16.91% and 12.54% of the total phenotypic variance, respectively. qDRPW5a and qDRPW5b, associated with yield loss, were located at two adjacent marker intervals on chromosome 5 and explained 14.15% and 14.59% of the total phenotypic variation and possessed LOD values of 3.40 and 3.39, respectively. qDRPW9 was considered as a minor QTL and only explained 1.02% of the phenotypic variation. qLRGPP5 contributed to the loss in the number of grains and explained 10.91% of the phenotypic variation. This study provides useful information for the breeding of resistant cultivars against white tip disease in rice.
authors.affiliation: Institute of Plant Protection, Jiangsu Academy of Agricultural Sciences, Nanjing, China.
authors.forename: Tong
authors.initials: T
authors.lastname: Zhou
authors.affiliation: Institute of Plant Protection, Jiangsu Academy of Agricultural Sciences, Nanjing, China; College of Life Science, Nanjing Agricultural University, Nanjing, China.
authors.forename: Cunyi
authors.initials: C
authors.lastname: Gao
authors.affiliation: Institute of Plant Protection, Jiangsu Academy of Agricultural Sciences, Nanjing, China.
authors.forename: Linlin
authors.initials: L
authors.lastname: Du
authors.affiliation: Institute of Plant Protection, Jiangsu Academy of Agricultural Sciences, Nanjing, China.
authors.forename: Hui
authors.initials: H
authors.lastname: Feng
authors.affiliation: Institute of Plant Protection, Jiangsu Academy of Agricultural Sciences, Nanjing, China.
authors.forename: Lijiao
authors.initials: L
authors.lastname: Wang
authors.affiliation: Institute of Plant Protection, Jiangsu Academy of Agricultural Sciences, Nanjing, China.
authors.forename: Ying
authors.initials: Y
authors.lastname: Lan
authors.affiliation: Institute of Plant Protection, Jiangsu Academy of Agricultural Sciences, Nanjing, China.
authors.forename: Feng
authors.initials: F
authors.lastname: Sun
authors.affiliation: Institute of Plant Protection, Jiangsu Academy of Agricultural Sciences, Nanjing, China.
authors.forename: Lihui
authors.initials: L
authors.lastname: Wei
authors.affiliation: Institute of Plant Protection, Jiangsu Academy of Agricultural Sciences, Nanjing, China.
authors.forename: Yongjian
authors.initials: Y
authors.lastname: Fan
authors.affiliation: College of Life Science, Nanjing Agricultural University, Nanjing, China.
authors.forename: Wenbiao
authors.initials: W
authors.lastname: Shen
authors.affiliation: Institute of Plant Protection, Jiangsu Academy of Agricultural Sciences, Nanjing, China.
authors.forename: Yijun
authors.initials: Y
authors.lastname: Zhou
mesh_terms: D000818:Animals; D002678:Chimera; D002874:Chromosome Mapping; D032461:Chromosomes, Plant / Q000737:chemistry*; D003433:Crosses, Genetic; D005838:Genotype; D009348:Nematoda / Q000472:pathogenicity / Q000502:physiology; D012275:Oryza / Q000235:genetics* / Q000276:immunology / Q000469:parasitology; D010641:Phenotype; D010935:Plant Diseases / Q000235:genetics* / Q000276:immunology / Q000469:parasitology; D057865:Plant Immunity / Q000235:genetics*; D040641:Quantitative Trait Loci