@article{fdi:010012482, title = {{A} major quantitative trait locus for rice yellow mottle virus resistance maps to a cluster of blast resistance genes on chromosome 12}, author = {{G}hesqui{\`e}re, {A}lain and {A}lbar, {L}aurence and {L}orieux, {M}athias and {A}hmadi, {N}. and {F}argette, {D}enis and {H}uang, {N}. and {M}c{C}ouch {S}.{R}. and {N}otteghem, {J}.{L}.}, editor = {}, language = {{ENG}}, abstract = {{T}wo doubled-haploid rice populations, {IR}64/{A}zucena and {IRAT}177/{A}pura, were used to identify markers linked to rice yellow mottle virus ({RYMV}) resistance using core restriction fragment length polymorphism ({RFLP}) maps. {R}esistance was measured by mechanical inoculation of 19-day-old seedlings followed by assessment of virus content by enzyme-linked immunosorbent assay tests 15 days after inoculation. {IR}64/{A}zucena and {IRAT}177/{A}pura populations, 72 and 43 lines, respectively, were evaluated, and resistance was found to be polygenic. {R}esistance was expressed as a slower virus multiplication, low symptom expression, and limited yield loss when assessed at the field level. {B}ulked segregant analysis using the {IR}64/{A}zucena population identified a single random amplified polymorphic {DNA} marker that mapped on chromosome 12 and corresponded to a major quantitative trait locus ({QTL}) evidenced by interval mapping. {W}hen pooling {RFLP} data, integrated mapping of this chromosome revealed that the {QTL} was common to the two populations and corresponded to a small chromosomal segment known to contain a cluster of major blast resistance genes. {T}his region of the genome also reflected the differentiation observed at the {RFLP} level between the subspecies #indica$ and #japonica$ of #{O}ryza sativa$. {T}his is consistent with the observation that most sources of {RYMV} resistance used in rice breeding are found in upland rice varieties that typically belong to the #japonica$ subspecies. ({R}{\'e}sum{\'e} d'auteur)}, keywords = {{MALADIE} {DES} {PLANTES} ; {RIZ} ; {VIROSE} ; {VARIETE} {RESISTANTE} ; {GENETIQUE} ; {TECHNIQUE} {RFLP} ; {TEST} {ELISA} ; {POLYMORPHISME} {ENZYMATIQUE}}, booktitle = {}, journal = {{P}hytopathology}, volume = {87}, numero = {12}, pages = {1243--1249}, ISSN = {0031-949{X}}, year = {1997}, DOI = {10.1094/{PHYTO}.1997.87.12.1243}, URL = {https://www.documentation.ird.fr/hor/fdi:010012482}, }