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- W2770974218 abstract "Bacterial wilt caused by casual agent Ralstonia solanacearum (Rs)is a serious disease in groundnut and great many other plant species.Forward and reverse genetics strategies were adopted inour study. From the view point of forward genetics, the peanutRILs including 300 F9 progenies derived from Yueyou 92 × Xinhuixiaoliwere tested of disease resistance through inoculationwith R.solanacearum in the field. Resistance to R.solanacearumis a quantitative trait. Three QTLs were mapped on an interval15 cM using a linkage map with SSR and related SNP markers.An Tir-NBS-LRR resistance gene AhqBW3 was found closelylinked with a BW resistance molecular marker SNP79 which wasmapped in a gene locus next to the R gene. AhqBW3 was showeddownregulation under the challenge of Rs inoculation. From theview point of reverse genetics, a novel NBS-LRR resistance geneAhRRS5, an LRR-RLK gene AhRLK1 and an unkown gene AhRRS22were upregulated by Rs inoculation which were screened frommicroarray hybridization. They showed resistance phenotypes intransgenic tobacco overexpressing of these three genes. Amongof them, Overexpression of AhRRS5 significantly enhanced theresistance of heterogeneous tobacco to R. solanacearum, withdiverse resistance levels in different transgenic lines. Severaldefense-responsive marker genes in hypersensitive response,including HR, SA, JA, and ET signals, were considerably upregulatedin the transgenic lines as compared with the wild type in responseto R. solanacearum. NPR1 and NDR1 were also upregulatedin response to the pathogen. These results indicate that AhRRS5participates in the defense response to R. solanacearum throughthe crosstalk of multiple signaling pathways and the involvementof NPR1 and R gene signals for its resistance. These studies mayguide the resistance enhancement of peanut and other economiccrops to bacterial wilt disease." @default.
- W2770974218 created "2017-12-04" @default.
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- W2770974218 date "2017-02-01" @default.
- W2770974218 modified "2023-09-27" @default.
- W2770974218 title "Characterization of groundnut resistance to bacterial-wilt caused by Ralstonia solanacearum by forward and reverse genetics methods" @default.
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