Production and Evaluation of F1 Hybrids of Protected Cultivation Cucumber

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The study was conducted in the College of Agriculture, University of Anbar, in the Autumn season of 2021 and spring 2022, in an unheated greenhouse. Four pure lines of Gynoecious cucumbers for protected cultivation were used, and full diallel cross were conducted in all directions to produce 12 reciprocal and reverse hybrids of the F1. The seeds of the parents and the resulting hybrids were sown. Including it with an approved hybrid (Kanz) for the purpose of comparison, which numbered 17 genotypes according to the design of Randomized Complete Block Design (RCBD) with three replications to evaluate the parents and the resulting hybrids and estimate some genetic parameters and the type of genetic action. The results showed that there were significant differences in the studied lines, as parents P4 and P1 showed superior over the other of the parents, as father 4 gave the best results for the parents in the characteristics of the number of nodes on the plant, leaf area, number of fruits and plant yield, which amounted to 36.32 node plant−1, 114.74 dm2 plant−1, 55.35 fruit plant−1 and 4.59 kg plant−1, and parent 1 did not differ from parent 4 in most characteristics, while parent 2 recorded the lowest results in all characteristics. The average heritability in the broad sense of the reverse effect was greater than the reciprocal effect and the low degree of heritability in the narrow sense, which indicates the possibility of Hybridization to obtain the desired characteristics and to obtain distinct hybrids.