Submitted to: Rice Field Day Abstract
Publication Type: Abstract Only
Publication Acceptance Date: 8/30/2006
Publication Date: 8/30/2006
Citation: Andaya, C.B., Kim, S., Tai, T. 2006. Molecular characterization of the rice low phytic acid (lpa1) locus.. Rice Field Day Abstract.
Technical Abstract: Phytic acid (PA), the main storage form of phosphorus (P) in seeds, is important for seedling growth as it supplies phosphate, myo-inositol, and mineral nutrients for the growing plant. PA also plays a significant role in human and animal nutrition. The presence of high PA in unprocessed cereal grains prevents absorption of important minerals like iron, zinc, calcium, and magnesium from these foods. Non-ruminant animals are unable to digest PA, thus grain-based feeds must be supplemented with phosphorus or enzymes that can breakdown PA, which increases costs and contributes to pollution problems. A rice low phytic acid mutant (lpa1), which has 32% reduction in seed PA and a corresponding increase in inorganic P was previously identified. We have mapped the lpa1 mutation to a 47 kb region of chromosome 2 containing a small number of candidate genes. We will report our progress on identifying the gene by sequencing of the 47 kb region and functional complementation experiments.