AP1 — Triticum aestivum

Summary

TRAESCS5B02G396600, also known as TaAP1, TaVRT-1, or VRN-B1 on wheat chromosome 5B, encodes a MADS-box transcription factor that binds RNA polymerase II regulatory regions and mediates protein dimerization. This gene is associated with the vernalization response, floral meristem identity, and floral organ specification. It is linked to yield, heading date, flowering time, and frost tolerance in wheat. Additional associations include grain number per spikelet, spike length, peduncle length, awn length, flag leaf angle, canopy temperature, anther extrusion, seedling vigour, stand establishment, coleoptile length, root weight, stem weight, spike dry weight, flour color, SDS sedimentation, pre-harvest sprouting, sprouting tolerance, winter survival, frost damage, water stress tolerance, aluminum tolerance, sodium and phosphorus concentration, fructose and polysaccharide content, and carbohydrate transport. The protein localizes to the nucleus. Studies of related genes in Arabidopsis link the family to salt tolerance, freezing tolerance, and abscisic acid sensitivity.