Molecular Cloning and Characterization of Two Fiber Elongation Genes Using a Cotton Fiber Developmental Mutant (Gossypium hirsutum L.) Accumulation of the γ-aminobutyric Acid in Brown Rice—A New Rice Strain W025 with Giant-embryo during Water Soaking Breeding of High Gad Producing E. coli Strains and Optimization of Fermentation Conditions Optimization of γ-aminobutyric Preparation by Recombinant Glutamate Decarboxylase