ADG1 — Zea mays

Summary

ZmADG1 (ZM00001EB176800) on maize chromosome 4 encodes the small subunit of ADP-glucose pyrophosphorylase (EC 2.7.7.27), also known as Brittle-2, and is a member of the ADP-Glc_PPase family. The gene is associated with starch biosynthesis and metabolism, localising to the amyloplast and the heterotetrameric ADPG pyrophosphorylase complex. It has been connected to numerous endosperm traits including brittle, floury, dull and rough endosperm, as well as starch, amylose and amylopectin content, grain lysine content, grain volume, ear weight and length, and grain filling period. Associations also extend to photosynthetic ability, red light sensitivity, photoperiodic flowering, root branching, leaf curling and drying, and responses to abiotic stimuli. Studies of related genes in other species link the family to photosynthetic capacity, biomass production, seed dormancy and photomorphogenesis.