التحري عن حساسية تراكيب وراثية معينة لنبات الرز للإصابة ببعض المسببات المرضية الفطرية

الملخص EN

This study was carried out to evaluate the susceptibility of four rice genotypes: HH12- DT10SAL1-DT1, IR08N150, R10A267, and IR06A145 to six Phytopathogenic fungi Fusarium oxysporum R6, Fusarium solani R11, Bipolaris spicifera R15, Nigrospora oryzae R9, Exserohilum rostratum R19 and Curvularia lunata R21.

The results of this study showed that all tested genotypes were susceptible to all pathogenic fungi that mentioned above, and all these pathogens reduced seed germination.

Statistical analysis exhibited significant differences (P≤0.05) in rate of the pre-emergence seedling for both genotypes IR08N150 and R10A267 with pathogens C.lunata R21 (100% respectively).

Also, this study indicates that F.

oxysporum R6 with genotypes IR06A145, IR08N150 and R10A267 recorded the highest percentage of disease infection (100% respectively).

Furthermore, disease severity of these genotypes HH12-DT10SAL1-DT1 IR06A145, IR08N150, IR10 that used in this experiment with fungi F.

solani R11, N.

oryzae R9, F.

oxysporum R6, E.

rostratum R19 and C.

lunata R21 were reached up to 100% for all pathogens