Genetic analysis and Specific Fragments Linked to Powdery Mildew Resistant Gene Pm-2F in Melon Progress on the Molecular Biology of the Cladosporium fulvum and Its Resistance Genes in Tomato Genetic analysis and Specific Fragments Linked to Powdery Mildew Resistant Gene Pm-2F in Melon Comparison of Amino Acid Sequences on Resistant Gene Tm-22and its Alleles Comparison of Amino Acid Sequences on Resistant Gene Tm-22and its Alleles Comparative Mapping of Virus Resistant Gene zym-CH in Watermelon Comparative Mapping of Virus Resistant Gene zym-CH in Watermelon Progress on the Molecular Biology of the Cladosporium fulvum and Its Resistance Genes in Tomato