Reham Nbeaa⁽¹⁾*, Bassam Abo-Trabi ⁽¹⁾ and Ehab Ahmad ⁽²⁾

(1). Horticultural science Department, Faculty of Agriculture, Damascus University, Damascus, Syria.

(2). Agricultural Research Center of Latakia, General Commission for Scientific

Agricultural Research (GCSAR), Damascus, Syria.

 (* Corresponding author: Reham Nbeaa. E-Mail:rehamnbeaa@gmail.com).

Received: 13/02/2022              Accepted: 09/06/2022

Abstract: 

This study was carried out at Agricultural Research Center of Lattakia, Boka, which belongs to General Commission for Scientific Agricultural Research by employing six hybrids of okra produced by a four-diallel crossing scheme in a randomized complete blocks design with three replications, to estimate the effect of heterosis and inbreeding depression for number of days to first flowering, number of days to 50% of flowering, number of the first flowering node, number of the first fruiting node, number of branches\plant, number of nodes, fruit length (cm) and fruit diameter (cm). The results showed that Hybrids Red Lathkani × New Lathkani, Istanboli ×New Lathkani and Red Lathani × Old Lathkani had significant and high significant mid-parent hetersis for number of days to first flowering, and Istanboli × New Lathkani and Red Lathkani × New Lathkani had significant and high significant best parent hetersis for fruit length. Also, the low occurrence of inbreeding depression  for the number of branches/plant  or its non-occurrence at all in other traits may be due to the influence of these traits by the addition gene action.

Key words: Okra, Heterosis, Inbreeding depression, half-Diallel crossing, earliness.

Full paper in Arabic: pdf