Investigating the Mechanisms Underlying the Durability and Sustainable Use of Pb1 Gene-Mediated High Field Resistance to Rice Panicle Blast

Rice blast, caused by Magnaporthe oryzae, poses a significant threat to rice production. blast susceptibility has been observed in Japanese varieties with excellent eating quality. Enhancing resistance is essential ensure minimal use of agricultural chemicals. Two types are observed: True resistance, which type qualitative expressed major gene, and field quantitative multiple micro-acting genes. ‘Resistance collapse’, variety true gene becomes diseased fungus races compatible the observed. Varieties carrying blast-resistance genes, such as Pb1 (panicle 1), have developed through DNA marker-assisted selection. In this review, we focus on Pb1, expresses strong panicle widely used Japan without showing ‘resistance collapse’ for 40 years. an ‘adult plant gene’ that does not exert selection pressure population during leaf stage, thus preventing selective multiplication Pb1-compatible strains. This epidemiological mechanism prevents collapse’. Interdisciplinary research breeding required sustainably genes induce high resistance.