LHS1 — Oryza sativa Japonica

Summary

OS03G0215400 (LHS1, also known as MADS1 or OsMADS1) on rice chromosome 3 encodes a MADS-box transcription factor containing MADS-box and K-box domains, with RNA polymerase II transcription regulatory region sequence-specific DNA binding and protein dimerization activities. This gene is associated with floral organ identity and development, spikelet meristem identity and determinacy, inflorescence architecture, panicle branching, and heading date. It is linked to grain yield components including grain number, size, weight, length, and width, as well as plant height, tiller number, pollen fertility, and heterosis. Additional associations include auxin and cytokinin metabolism, meristem growth, carpel and pistil development, and leaf and vegetative development. The encoded protein localizes to the nucleus. Studies of related genes in other species link the family to agronomic traits such as seed weight, grains per spike, and cold and drought tolerance.