Assessment of hybrids derived from gynoecious cucumber lines

Document Type : Research paper

Authors

Department of Horticultural Sciences, Faculty of Agricultural Sciences, University of Guilan, Rasht, Iran.

Abstract

This study aimed to evaluate the general and specific combining abilities and the gene action mechanisms underlying certain traits of cucumber. The experiment was conducted using an incomplete diallel cross in a completely randomized design with three replications during the 2022-2023 growing season at the Faculty of Agriculture, University of Guilan. The results revealed significant differences across all traits except for fruit width and plant length. The mean squares for both general and specific combining abilities were significant for traits such as the number of pistillate flowers, the number of staminate flowers up to the 15th node, the number of final nodes, fruit weight, the number of fruits, and yield per plant. This indicates that both additive and non-additive gene actions are involved in the genetic control of these traits. However, the mean square for specific combining ability was not significant for ovary length, suggesting no significant variation among hybrids in terms of specific combining ability for this trait. Furthermore, based on the results, the highest significant positive and negative general combining abilities at the 1% probability level for yield per plant were associated with line 3 (0.21) and line 2 (-0.22), respectively. This indicates that line 3 contributes to increased yield, while line 2 is associated with a decrease. Therefore, line 3 could be effectively utilized in breeding programs aimed at enhancing yield. In conclusion, the findings demonstrate that additive variance plays a more prominent role in controlling these traits than non-additive variance. Consequently, the use of selected recombinant inbred lines is recommended for future breeding efforts.

Keywords

References

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History

  • Receive Date: 02 January 2025
  • Revise Date: 18 June 2025
  • Accept Date: 18 June 2025

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