Determination of Resistance Levels to Fusarium Oxysporum f. sp. Melonis and ZYMV and Homogeneity in Some Melon Genotypes

Abstract

ZYMV and Fusarium oxysporum f. sp. melonis are one of the main disease factors limiting melon cultivation. ZYMV (Zucchini Yellow Mosaic Virus) is one of the most important diseases caused by potyvirus and causing the most important yield losses in melons. Another important disease agent, Fusarium oxysporum f. sp. Melonis, is a soil-borne disease with four races FOM 0, 1, 2, 1-2. The most common races are 1 and 2 in Turkey. This study, 87 melon accessories ZYMV and Fom 1 and Fom 2 races resistance levels and homogeneity testing levels of genotypes were determined. Result of the study, when the resistance among the genotypes for two races was examined, Fom 1 and Fom 2 strains, 23 genotypes were found to have homozygous resistance alleles against to both races, while for Fom 1 there were 46 allele resistance lines in total, and 30 genotypes had homozygous resistance alleles, 16 of them had heterozygous resistance alleles. This situation for Fom 2, it was found that there were 75 allele resistant alleles, 69 genotypes had homozygous allele and 16 genotypes had heterozygous allele. All genotypes are sensitive against to ZYMV. Homogeneity levels,29 of the genotypes were observed to be between 85-95%.