title: Mapping and marker-assisted selection of a brown planthopper resistance gene bph2 in rice (Oryza sativa L.).
abstract: Nilaparvata lugens Stål (brown planthopper, BPH), is one of the major insect pests of rice (Oryza sativa L.) in the temperate rice-growing region. In this study, ASD7 harboring a BPH resistance gene bph2 was crossed to a susceptible cultivar C418, a japonica restorer line. BPH resistance was evaluated using 134 F2:3 lines derived from the cross between "ASD7" and "C418". SSR assay and linkage analysis were carried out to detect bph2. As a result, the resistant gene bph2 in ASD7 was successfully mapped between RM7102 and RM463 on the long arm of chromosome 12, with distances of 7.6 cM and 7.2 cM, respectively. Meanwhile, both phenotypic selection and marker-assisted selection (MAS) were conducted in the BC1F1 and BC2F1 populations. Selection efficiencies of RM7102 and RM463 were determined to be 89.9% and 91.2%, respectively. It would be very beneficial for BPH resistance improvement by using MAS of this gene.
authors.affiliation: National Key Laboratory for Crop Genetics and Germplasm Enhancement, Nanjing Agricultural University, China.
authors.forename: Li-Hong
authors.initials: LH
authors.lastname: Sun
authors.forename: Chun-Ming
authors.initials: CM
authors.lastname: Wang
authors.forename: Chang-Chao
authors.initials: CC
authors.lastname: Su
authors.forename: Yu-Qiang
authors.initials: YQ
authors.lastname: Liu
authors.forename: Hu-Qu
authors.initials: HQ
authors.lastname: Zhai
authors.forename: Jian-Min
authors.initials: JM
authors.lastname: Wan
mesh_terms: D000818:Animals; D015415:Biomarkers / Q000378:metabolism; D002874:Chromosome Mapping; D032461:Chromosomes, Plant; D018744:DNA, Plant / Q000032:analysis; D017343:Genes, Plant / Q000235:genetics* / Q000502:physiology; D006430:Hemiptera / Q000502:physiology; D007113:Immunity, Innate / Q000235:genetics*; D012275:Oryza / Q000235:genetics* / Q000469:parasitology; D010935:Plant Diseases / Q000235:genetics* / Q000469:parasitology
chemical_list: D015415:Biomarkers; D018744:DNA, Plant