@article{fdi:010017829,
  title = {{G}enetic basis and mapping of the resistance to rice yellow mottle virus : 2. {E}vidence of a complementary epistasis between two {QTL}s},
  author = {{P}ressoir, {G}. and {A}lbar, {L}aurence and {A}hmadi, {N}. and {R}imbault, {I}sabelle and {L}orieux, {M}athias and {F}argette, {D}enis and {G}hesqui{\`e}re, {A}lain},
  editor = {},
  language = {{ENG}},
  abstract = {{T}he genetic basis of resistance to rice yellow mottle virus ({RYMV}) was studied in a doubled-haploid ({DH}) population derived from a cross between the very susceptible indica variety '{IR}64' and the resistant upland japonica variety {A}zucena. {A}s a quantitative trait locus ({QTL}) involved in virus content estimated with an {ELISA} test has been previously identified on chromosome 12, we performed a wide search for interactions between this {QTL} and the rest of the genome, and between this {QTL} and morphological traits segretating in the population. {M}ultiple regression with all identified genetic factors was used to validate the interactions. {S}ignificant epistasis accounting for a major part of the total genetic variation was observed. {A} complementary epistasis between the {QTL} located on chromosome 12 and a {QTL} located on chromosome 7 could be the major genetic factor controlling the virus content. {R}esistance was also affected by a morphology-dependent mechanism since tillering was interfering with the resistance mechanism conditioned by the epistasis between the two {QTL}s. marker-assisted backcross breeding was developed to introgress the {QTL}s of chromosome 7 and chromosome 12 in the susceptible '{IR}64' genetic background. {F}irst results confirmed that if both {QTL}s do not segregate in a backcross-derived {F}2 population, then the {QTL} of chromosome 12 cannot explain differences in virus content. {A}n near-isogenic line ({NIL}) approach is currently being developed to confirm the proposed genetic model of resistance to {RYMV}. ({R}{\'e}sum{\'e} d'auteur)},
  keywords = {{MALADIE} {DES} {PLANTES} ; {RIZ} ; {VIRUS} ; {RESISTANCE} ; {GENE} ; {LOCUS} ; {INTERACTION} ; {MARQUEUR} {GENETIQUE} ; {MORPHOLOGIE}},
  booktitle = {},
  journal = {{T}heoretical and {A}pplied {G}enetics},
  volume = {97},
  numero = {7},
  pages = {1155--1161},
  ISSN = {0040-5752},
  year = {1998},
  DOI = {10.1007/s001220051004},
  URL = {https://www.documentation.ird.fr/hor/fdi:010017829},
}