Comparative Studies on Quality Characters under Water- and Dry-cultivation in Rice QTL Analysis of Embryo Weight Correlative Traits in Rice (Oryza sativa L.) Genetic Analysis of Grain Plumpness of Rice Using a DH Population Derived from an Indica/Japonica Cross Molecular Marker-Assisted Selection of DH Plants Conferring Genes Resistant to Powdery Mildew in Wheat (Triticum aestivum L.)