This study was carried out from 2020 to 2022 at Kaha vegetable Research Farm, Horticulture Research Institute, Kaliobia Governorate under unheated plastic house to produce some F₁ seeds. Six parental genotypes and their fifteen hybrids were evaluated in open field in the two summer successive seasons 2021 and 2022. Significant differences among genotypes were observed in mean performance for all studied characters. Highly significant differences for general and specific combining abilities were found for all studied characters. Estimates of general combining ability effects showed that the line 220-2 (P3) was the best combiner for most studied characters i.e. days to female flower anthesis, average fruit weight, fruit length, fruit diameter and total yield/plant followed by the lines 202-2 (P1) and 264 (P4). Certain crosses had high SCA effect values for certain traits.  For specific combining ability effects, the best crosses were P1×P3, P1×P6, P1×P2 and P2×P3 since they showed significant SCA effect values for number of days to anthesis of first female flower, early yield /plant and total yield / plant. For heterosis effects all crosses indicated desirable positive MP heterosis ranged from 23.80 (P2×P5) to 147.83 % (P3×P4) and all crosses indicated desirable positive HP heterosis ranged from 18.18 (P2×P5) to 137.50 % (P3×P4) except the cross (P1×P4) for early yield / plant. For total yield/ plant all crosses indicated desirable positive MP and HP heterosis except three crosses i.e. P2×P5, P4×P6 and P5×P6. MP heterosis ranged from 39.28 (P1×P4) to 152.11 % (P2×P4) and HP heterosis ranged from 32.79 (P1×P4) to 127.31 % (P2×P4). The presence of desirable heterosis in yield and its components encourage using F₁ hybrids in commercial production.