RESEARCH PROGRESS AND PROSPECTS OF LOW PHYTIC ACID CROPS SPACE TECHNIQUES INDUCED GRAIN QUALITY VARIATIONS IN RICE CULTIVAR 9311 POLYMERIZATION OF LOW PHYTIC ACID MUTANT GENES AND FERRITIN GENE IN RICE ANALYSIS OF NUTRITIONAL QUALITY OF LOW PHYTIC ACID MUTANTS IN MAIZE BRIEF REPORT ON SRCEENING MAIZE MUTANTS WITH HIGH INORGANIC PHOSPORUS AND LOW PHYTIC ACID CONTENT