AP1 — Triticum turgidum subsp. durum

Summary

TRITD1AV1G130620, also known as TtAP1, encodes a MADS-box transcription factor on durum wheat chromosome 1A. The protein possesses DNA-binding transcription factor activity, RNA polymerase II-specific regulatory region binding, and protein dimerization activity. It is associated with the regulation of floral meristem identity, floral organ specification, and reproductive structure development, as well as fruit morphogenesis, carpel and stamen development, and meristem determinacy. The gene is linked to traits including photoperiod-sensitive flowering time, days to flowering, heading date, grain weight, seed growth and development, inflorescence morphology, and responses to high temperature stress, UV light, and drought. It localizes to the nucleus, cytoplasm, and nucleolus. Studies of related genes in other species connect the family to floral transition, vernalization response, inflorescence architecture, and grain shape.