Gene dosage effect of waxy alleles on amylose content in endosperm starch of rice.

Abstract

The waxy (glutinous) endosperm character in rice, Oryza sativa L., is controlled by the wx gene belonging to linkage group I, chromosome 6 (Iwata and Omura 1971). The wx locus is known to control the constitution of endosperm starch in different cereals, and no other locus has so far been found in rice. The starch of non-waxy endosperm contains both amylopectin and amylose molecules, whereas the waxy endosperm starch contains only amylopectin and no amylose, or very little amylose (Taki