GW8 — Oryza sativa Indica Group

Summary

BGIOSGA031055 (GW8, also known as SPL18, SPL13A, SPL13B) on chromosome 9 of Indica rice encodes an SBP-domain protein with DNA-binding transcription factor activity, localised to the nucleus. In this species, GW8 is associated with grain number, grain weight, grain width, cell proliferation, tiller number, panicle and spikelet development, and the transition from vegetative to reproductive phase. It is linked to anther development, cell division, and response to fungi. Additional associations include grain size, grain length, grain thickness, spikelet dimensions, stigma exsertion, grain yield, leaf morphology, juvenile-to-adult and vegetative-to-reproductive transitions, adventitious root development, somatic embryogenesis, grain quality, and yield. Studies of related genes in other species connect the family to traits such as inflorescence branching, heading time, plant height, seed size, heat and cold tolerance, and amylose content.