Manal Madarati1* and Ahmed Aljouma2
1 Aleppo Research Center, General Commission for Agricultural Scientific Research, Syria.
2 Cotton Research Administration, General Commission for Agricultural Scientific Research, Syria.
(*Corresponding author: Manal Madarati, Email: manalmadarati7@gmail.com ).
Received: 12/ 1/ 2025 Accepted: 29/ 9/ 2025
Abstract:
The experiment was conducted at Tal Hadya station in Aleppo, Cotton Research Department, General Commission for Agricultural Scientific Center during 2022 season. Fifteen genotypes were used RCBD design with three replications to study the heterosis, inbreeding depression in F2, heritability (broad sense) and genetic advance. The results showed the high heterosis was followed by low genetic inbreeding depression in the hybrid (Line5 × Deir Al-Zour 22) for the number of actual bolls and boll weight which referred to the additive effect of genes in heritage these two objectives. Estimation of heterosis showed significant value in f1 in the hybrid (Raqqa 5 × Fantom) excelled f2 which indicated to transgressive segregation. The results showed high heritability estimates coupled with high genetic advance as percent of mean was recorded for first sympodial branch height and boll weight. This clearly indicated the existence of additive genetic control. These characters could well be improved by selection.
Keywords: cotton, heterosis, inbreeding depression, heritability, genetic advance, genotypes.
Full paper in Arabic: PDF