Screening and genetic analysis of pumpkin (Cucurbita moschata) genotypes for resistance to pumpkin yellow vein mosaic virus (PYVMV)

Two separate experiments were done with eighteen locally available pumpkin genotypes. First was done under field condition where there was no attempt taken to control the infestation by white fly which is the key vector for transmitting pumpkin yellow vein mosaic virus at Field laboratory. Second experiment was done net at Net House of Department of Genetics and Plant Breeding. About seven genotypes were selected for next year for second experiment which was mechanically inoculated with virus by rubbing of virus sap. The performance of 18 pumpkin genotypes for yield and different yield contributing traits were evaluated and observed that there were significant variations for all the traits studied among the genotypes. Genetic variability analysis revealed that there is significant amount of variability present among genotypes of pumpkin which can be exploited for qualified and high yield pumpkin production. Fruit weight of pumpkin is positively correlated with the yield of pumpkin. Genotypes PK2, PK5, PK6, PK13, PK15, PK16 and PK17 showed resistance against PYVMV under field condition. Genotype PK13 showed resistance against PYVMV both under field condition and artificial rubbing.

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