A-PAGE Establishment in Genus Sorghum and Its Application for Seed Identification Polymorphism Analysis of Seedling Storage Proteins in Foxtail Millet(Setaria italic L.Beauv.)with A-PAGE Gliadin Genetic Diversity Analysis of 119 Wheat Germplasms Preliminary Construction and Application of GIiadin Fingerprints Database of Chinese Wheat Germplasm Identification and Characterization of Phosphorus Use Efficiency in a Doubled Haploid Population of Chinese Spring×Lovrin No.10