HOMOLOGOUS SERLES OF INDUCED EARLY MUTANTS IN INDICA RICEITHE PRODUCTION OF HOMOLOGOUS SERIES OF EARLY MUTANTS STUDY ON HOMOLOGOUS SERIES OF INDUCED EARLY MUTANTS IN INDICA RICE Ⅱ THE RELATIONSHIP BETWEEN THE HOMOLOGOUS SERIES OF EARLY MUTANTS INDUCED AND THE ECOTYPE IN INDICA RICE HOMOLOGOUS SERIES OF INDUCED EARLY MUTANTS IN INDICA RICE Ⅲ.The relationship between the induction of homologous series of early mutants and its different pedigree