Albar Laurence auteur aut IRD Lorieux Mathias auteur aut IRD Ahmadi N. auteur aut IRD Rimbault Isabelle auteur aut IRD Pinel Agnès auteur aut IRD Sy A.A. auteur aut IRD Fargette Denis auteur aut IRD Ghesquière Alain auteur aut IRD text journalArticle eng text/pdf reformatted digital access Rice yellow mottle virus (RYMV) resistance QTLs were mapped in a doubled-haploid population of rice, 'IR64/Azucena'. Disease impact on plant morphology and development, expression of symptoms and virus content were evaluated in field conditions. Virus content was also assessed in a growth chamber. RYMV resistance was found to be under a polygenic determinism, and 15 QTLs were detected on seven chromosomal fragments. For all of the resistance QTLs detected, the favourable allele was provided by the resistant parent 'Azucena'. Three regions were determined using different resistance parameters and in two environments. On chromosome 12, a QTL of resistance that had already been detected in this population and another indica/japonica population was confirmed both in the field and under controlled conditions. Significant correlations were observed between resistance and tillering ability, as measured on control non-inoculated plants. In addition, the three genomic fragments involved in resistance were also involved in plant architecture and development. In particular, the semi-dwarfing gene sd-1, on chromosome 1, provided by the susceptible parent, 'IR64', mapped in a region where resistance QTLs were detected with most of the resistance parameters. In contrast, the QTL of resistance mapped on chromosome 12 was found to be independent of plant morphology. (Résumé d'auteur) specialized MALADIE DES PLANTES RIZ VIRUS RESISTANCE GENE LOCUS CARTOGRAPHIE MORPHOLOGIE 076MALPLA08 97 7 1145-1154 1998 0040-5752 https://www.documentation.ird.fr/hor/fdi:010017827 10.1007/s001220051003 0040-5752 [F B010017827] https://www.documentation.ird.fr/hor/fdi:010017827 https://horizon.documentation.ird.fr/exl-doc/pleins_textes/pleins_textes_6/b_fdi_49-50/010017827.pdf IRD - Base Horizon / Pleins textes 1999-06-14 2020-08-03 fdi:010017827 fre