Discovery and Genetic Analysis of a Fusiform Fruit Mutant in Winter Squash (Cucurbita Maxima Duch.) Primary Research on Heredity Rule of Multi-leaflet Mutant in Soybean Genetic Analysis and Endogenous Hormone Content in Apical Buds of A Cotton Mutant with Small Crinkled Leaves Construction of an EMS induced mutant library and identification of morphological characteristics in Medicago sativa Application of a chlorophyll fluorescence technique for screening photosynthetic mutants