HD1 — Oryza sativa Indica Group

Summary

BGIOSGA023597 (HD1, also known as OiBBX22) on chromosome 6 of Indica rice encodes a B-box zinc finger protein with DNA-binding transcription factor activity. It is localized to the nucleus and is associated with the regulation of photoperiodism and flowering, including both upregulation of short-day flowering and downregulation of long-day flowering, as well as photomorphogenesis, flower development, cell differentiation, and DNA-dependent transcription. The gene has been connected to several agronomically important traits, including days to heading, grain yield per plant, grain number, grain weight, panicle number, spikelet number, spikelet fertility, plant height, anthesis time, heterosis, cold tolerance, and amino acid and protein content. Studies of related genes in other species link the family to salt tolerance.