HAP3 — Oryza sativa Indica Group

Summary

BGIOSGA017902 (HAP3, also known as OiHAP3, NF-YB8, or NF-YB10) on chromosome 5 of Indica rice encodes a protein with a histone-fold domain and CBF/NF-YB conserved sequence, with DNA-binding transcription activator activity specific to RNA polymerase II. This gene is associated with grain quality and grain size, as well as grain width, length, weight, and yield. It is linked to photoperiod sensitivity and flowering time, including responses to short-day and long-day conditions, and to seed germination, dormancy, and starch content. Associations also include cold tolerance, salt tolerance, disease tolerance, chlorophyll content, photosynthetic rate, root length and morphology, leaf chlorosis, and stomatal complex development and patterning. Studies of related genes in other species link the family to drought tolerance and seed protein content.