DA2 — Oryza sativa Indica Group

Summary

BGIOSGA022341 (OiDA2, also known as OiGW2) on chromosome 6 of Indica rice encodes a Sip5/DA2 family protein with ubiquitin ligase activity and zinc-binding capability. The gene is associated with the regulation of seed size and organ growth, protein ubiquitination, and detoxification processes. It has been linked to numerous grain traits including grain weight, size, shape, length, number, and yield, as well as panicle number, spikelet fertility and sterility, plant height, leaf width, and rachis length. Additional associations include cell proliferation, leaf senescence, culm development, and responses to cold stress and pathogens. Studies of related genes in other species connect the family to organ size regulation, while sequence similarity links extend associations to wheat grain protein content and various yield-related traits across cereals.