TRANSGENIC ORGANISM

摘要

A transgenic organism is described which has an increased starch yield. The preferred embodiment concerns a plant or plant cell containing a recombinant DNA construct containing, in operational relationship to a plant promoter sequence or sequences enabling the expression of the gene by the plant or plant cell thereby to enhance the rate of production and/or yield of starch by the plant or the plant cell, a DNA sequence encoding an exogenous ADP glucose pyrophosphorylase enzyme (AGP) or a sub-unit thereof which retains the enzymatic activity of the AGP enzyme, characterised in that the said DNA sequence is the gene sequence, including non-critical allelic variations thereof, encoding the barley (Hordeum vulgare) endosperm AGP or an active sub-unit thereof, or a variant thereof having non-critical amino acid substitution(s) or deletion(s) at one or more points in the amino acid sequences defining the barley endosperm AGP or either of its sub-units.