HD3A — Oryza sativa Indica Group

Summary

BGIOSGA021057 (HD3A, also known as OiFTL12) on chromosome 6 of Indica rice encodes a phosphatidylethanolamine-binding protein (PEBP family). The gene is associated with phosphatidylethanolamine binding and is linked to the regulation of flowering time, including photoperiodism, the transition from vegetative to reproductive phase, and inflorescence development. It has been connected to responses to short-day conditions, vernalization, and both upregulation of vernalization response and downregulation of flower development. Associations with plant architecture, heading date, and leaf angle have been observed. The gene is also linked to grain weight, grain color, days to heading, anthesis time, chlorophyll content, amino acid content, protein content, cold tolerance, and heterosis. Its product localizes to the cytoplasm, nucleus, and endoplasmic reticulum. Studies of related PEBP family members in other species connect the family to grain yield, tiller formation, stem elongation, and drought tolerance.