D61 — Oryza sativa Japonica

Summary

Rice gene D61 (Os01g0718300, also known as BRI1) encodes a leucine-rich repeat receptor-like kinase with transmembrane receptor protein tyrosine kinase activity, belonging to the plant LRR-RLK family. It is associated with brassinosteroid signaling and plant architecture, including grain size, yield, leaf angle, and erect growth. D61 is linked to brassinosteroid content, shoot growth angle, root development, and meristem function. The gene has been connected to grain length, weight, and width, as well as biomass, panicle traits, and dwarfism. It is also associated with stress responses including salt, water, and temperature tolerance, and with biotic stress traits such as aphid and powdery mildew response. Studies of related genes in other species link the family to brassinosteroid receptor kinase activity, pathogen-associated molecular pattern-triggered immunity, and endosomal trafficking.