title: Identification of quantitative trait loci associated with resistance to brown planthopper in the indica rice cultivar Col.5 Thailand.
abstract: The brown planthopper (BPH) is one of the most serious insect pests of rice throughout Asia. In this study, we constructed a linkage map to determine the locus for BPH resistance gene, using an F(2) population from a cross between a resistant indica cultivar, 'Col.5 Thailand', and a susceptible cultivar '02428'. Insect resistance was evaluated using 147 F(3) families and the genotype of each F(2) plant was inferred from the phenotype of corresponding F(3) families. Two QTLs was detected on chromosome 2 (explains 29.4% phenotypic variation) and 6 (46.2% variation explained) associated with resistance to BPH in the mapping population. Comparison of the chromosomal locations and reactions to BPH biotypes indicated that the gene on chromosome 6 is different from at least 18 of the 19 previously identified BPH resistance genes. These two genes have large effects on BPH resistance and may be a useful BPH resistance resource for rice breeding programs.
authors.affiliation: National Key Laboratory for Crop Genetics and Germplasm Enhancement, Nanjing Agricultural University, Nanjing, PR China.
authors.forename: Lihong
authors.initials: L
authors.lastname: Sun
authors.forename: Yuqiang
authors.initials: Y
authors.lastname: Liu
authors.forename: Ling
authors.initials: L
authors.lastname: Jiang
authors.forename: Changchao
authors.initials: C
authors.lastname: Su
authors.forename: Chunming
authors.initials: C
authors.lastname: Wang
authors.forename: Huqu
authors.initials: H
authors.lastname: Zhai
authors.forename: Jianmin
authors.initials: J
authors.lastname: Wan
mesh_terms: D000818:Animals; D002874:Chromosome Mapping; D032461:Chromosomes, Plant / Q000235:genetics; D018744:DNA, Plant / Q000235:genetics; D005819:Genetic Markers; D006430:Hemiptera / Q000472:pathogenicity*; D007113:Immunity, Innate / Q000235:genetics*; D018895:Microsatellite Repeats / Q000235:genetics; D012275:Oryza / Q000235:genetics* / Q000469:parasitology; D010935:Plant Diseases / Q000235:genetics*; D040641:Quantitative Trait Loci; D013785:Thailand
chemical_list: D018744:DNA, Plant; D005819:Genetic Markers