Compositions and methods for producing starch with novel functionality
AssigneeCorn Products Development, Inc.
InventorsHongxin Jiang, Brad Ostrander, Chris Lane
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Abstract
This invention disclosure relates to novel maize starch. The starch can be made from the newly developed waxy sugary-2 double-mutant maize that has low activity of Granule Bound Starch Synthase I (GBSSI), which results in low amylose level. The starch from newly developed waxy sugary-2 double-mutant is freeze-thaw stable and has high viscosity. In comparison with the starch of the existing waxy sugary-2 double-mutant maize, the new waxy sugary-2 double-mutant maize starch showed, inter alia, improved pasting profile, starch granule integrity, larger starch granule size, and higher viscosity.
Claims21
A double-mutant corn plant, wherein the corn plant is homozygous recessive for a starch synthase IIa (su2) gene, and either homozygous or heterozygous for a mutated Granule-bound starch synthase I (GBSSI) gene, wherein the double-mutant corn plant has a phenotype in which the mutated GBSSI gene has less GBSSI activity than a wild type GBSSI gene (Wx), but has higher GBSSI activity than a recessive, loss-of-function GBSSI gene (wx).
Dependencies are inferred from the claim text.