Molecular Breeding of Low-Phytic-Acid Grains in Rice by Using the Promoter of 18 kDa Oleosin
In most plant seeds, phosphorus is stored primarily as myo-inositol 1,2,3,4,5,6-hexakisphosphate (InsP6; phytic acid). Monogastric animals are unable to utilize phytic acid phosphorus efficiently because they lack the digestive enzyme phytase, which is required to cleave phosphorus from phytic acid. Mineral phosphate is commonly added to animal diets as a supplement to prevent phosphorus deficiency. This causes high phosphorus concentrations in waste matter, and leads to the pollution of water bodies. Reducing the phytic acid content of seeds is a major breeding target, because it would both increase the availability of mineral nutrients and decrease the environmental phosphorus load.
KeywordsPhosphorus Inositol Hygromycin Agrobacterium
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