GENE ACTION AND HETEROSIS OF LINE X TESTER IN CUCUMBER Cucumis sativus L.

Abstract

The current study included two experiments. The first experiment was conducted during spring season (2013) to produce cucumber hybrids, Five pure cucumber lines were used as females and three pure lines as males. The second experiment was conducted during autumn season (2013), the parents and the hybrids from the first experiment and the control hybrid (Ghazer) were used to study hybrid vigor, gene action and other genetic parametars. The genetic and statistical analysis showed significant differences among the parents and the resulting hybrids in most studied traits. It was found that the best hybrid was (P5xT6) in plant height, number of nodes, number of branches, number of fruits and yield plant as averages (171.86 cm, 29.00, 4.60, 26..., 1.971) respectively. Most of the studied traits were over dominance type. The proportion of the broad sense heritability was high in all the studied traits 0.714 in yield of plant, while the proportion of the narrow sense heritability was low in most attributes 0.002 in number of branches and the number of fruits.