ALK — Oryza sativa Indica Group

Summary

BGIOSGA033011 (ALK, OiALK) on chromosome 10 of Indica rice encodes a protein with alpha-1,4-glucan glucosyltransferase activity (EC 2.4.1.21), belonging to the GS/SS family and containing a starch synthase catalytic domain. The gene is associated with amylopectin anabolism, starch anabolism, endosperm development, and amyloplast localization. It has been linked to grain shape, grain length, grain size, grain yield, head rice yield, and pericarp color, as well as to starch biosynthesis, amylopectin chain length distribution, starch granule formation, and endosperm starch synthesis. Related genes in other species are associated with cooking quality, starch gelatinization temperature, amylose-to-amylopectin ratio, grain weight, plant height, panicle length, heat tolerance, and heterosis.