Numerical and Economic Evaluation of Some Papaya Genotypes Trees Grown In Qalyubia Region

The study was undertaken to assess the genetic diversity on the basis of morphological and physiological characterization among 8 papaya genotypes in Qalyubia Governorate, Egypt during three successively seasons (2017, 2018 and 2019). Morphological, physiological and agronomical traits were studied across 8 papaya genotypes to characterize the genetic assessment which includes the following aspects: breeding method, sex form, special characteristics and fruit shape and size, plant height (cm), stem girth (cm), average No. leaves/plant, leaf length and diameter (cm), days from planting to first flowering, days from planting to first fruiting, days from planting to first harvest, number of fruits /tree, fruit weight (kg), yield (kg/tree), physical properties i.e. fruit length and diameter (cm) and fruit dimensions (fruit length/fruit diameter), fresh and dry weights (g) of papaya seed, chemical characteristics (SSC, vitamin C, papain enzyme, total, reducing and non-reducing sugars (%), study showed significant variation among all the genotypes in morphological and physiological traits. The obtained results showed that the availability of the selected papaya genotypes (G4 and G8) made it possible to study the influence of genotypes characteristics on the morphological, fruiting, yield, characteristics of fruits physical and chemical. Genetic diversity studies of available papaya genotypes are necessary to facilitate unambiguous identification of the various germplasms and their protection, and in turn can be provide to farmers and breeders to further improve auspicious papaya that could have a positive effect on the local economy.