@article{fdi:010089516,
  title = {{G}enetic bases of resistance to the rice hoja blanca disease deciphered by a quantitative trait locus approach},
  author = {{S}ilva, {A}. and {M}ontoya, {M}. {E}. and {Q}uintero, {C}. and {C}uasquer, {J}. and {T}ohme, {J}. and {G}raterol, {E}. and {C}ruz, {M}. and {L}orieux, {M}athias},
  editor = {},
  language = {{ENG}},
  abstract = {{R}ice hoja blanca ({RHB}) is one of the most serious diseases in rice-growing areas in tropical {A}mericas. {I}ts causal agent is {RHB} virus ({RHBV}), transmitted by the planthopper {T}agosodes orizicolus {M}uir. {G}enetic resistance is the most effective and environment-friendly way of controlling the disease. {S}o far, only 1 major quantitative trait locus ({QTL}) of {O}ryza sativa ssp. japonica origin, q{HBV}4.1, that alters the incidence of the virus symptoms in 2 {C}olombian cultivars has been reported. {T}his resistance has already started to be broken, stressing the urgent need for diversifying the resistance sources. {I}n the present study, we performed a search for new {QTL}s of {O}. sativa indica origin associated with {RHB} resistance. {W}e used 4 {F}2:3-segregating populations derived from indica-resistant varieties crossed with a highly susceptible japonica pivot parent. {B}esides the standard method for measuring disease incidence, we developed a new method based on computer-assisted image processing to determine the affected leaf area ({ALA}) as a measure of symptom severity. {B}ased on the disease severity and incidence scores in the {F}3 families under greenhouse conditions and {SNP} genotyping of the {F}2 individuals, we identified 4 new indica {QTL}s for {RHB} resistance on rice chromosomes 4, 6, and 11, namely, q{HBV}4.2({WAS}208), q{HBV}6.1({PTB}25), q{HBV}11.1, and q{HBV}11.2, respectively. {W}e also confirmed the wide-range action of q{HBV}4.1. {A}mong the 5 {QTL}s, q{HBV}4.1 and q{HBV}11.1 had the largest effects on incidence and severity, respectively. {T}hese results provide a more complete understanding of the genetic bases of {RHBV} resistance in the cultivated rice gene pool and can be used to develop marker-aided breeding strategies to improve {RHB} resistance. {T}he power of joint- and meta-analyses allowed precise mapping and candidate gene identification, providing the basis for positional cloning of the 2 major {QTL}s q{HBV}4.1 and q{HBV}11.1.},
  keywords = {{R}ice hoja blanca virus ; rice hoja blanca disease ; quantitative trait ; locus ; candidate gene ; {P}lant {G}enetics and {G}enomics},
  booktitle = {},
  journal = {{G}3 : {G}enes {G}enomes {G}enetics},
  volume = {13},
  numero = {12},
  pages = {jkad223 [15 p.]},
  ISSN = {2160-1836},
  year = {2023},
  DOI = {10.1093/g3journal/jkad223},
  URL = {https://www.documentation.ird.fr/hor/fdi:010089516},
}