Sanaa Sheekh*(1), Bolus Khoury(1) and Majd Darwish(1)
(1). Crop Department, Agriculture Faculty, TishreenUniversity, Lattakia, Syria
(* Corresponding author: Sanaa Sheekh, E-Mail: sanaaobaidsheekh@gmail.com)
Received:25/03/2023 Accepted:10/08/2023
Abstract:
This study was carried out in AL- SHEER -LATTAKIA during 2020/2021 and 2021/2022 seasons. Five bread wheat (Triticum aestivum L.) genotypes were used, namely; L-1300, L-1302, L-68017, L-66233, L-68467. Half diallel mating method was followed to get 10 hybrids. The hybrids and their parents were sown in the second season, using a randomized complete block design with three replications to estimate general combining ability GCA, specific combining ability SCA, genetic components, and both mid and better parent heterosis for traits: days to heading, grain filling period, spikelets/spike, flag leaf area, and grain yield per plant. The results showed the control of non-additive gene action was controlled at the inheritance of (days to heading, grain filling period). Exhibiting the predominant role of additive genetic variation in the inheritance of (spikelets/spike, flag leaf area, and grain yield per plant). Three parents had high general combiners effects for grain yield, (L-68467), (L-1300) and (L-68017). The derived progenies of these parents in the breeding program will have high gene inheritance. Many hybrids with desirable specific combining ability effects were obtained from parents with desirable general combining ability effects, which also have both mid and high parents heterosis, including (L-1300* L-68467) and( L-68017* L-68467). Thus hybrids could be used for selection in segregating generations in order to reach high yielding wheat lines.
Key words: Bread wheat, Combining ability, Genetic components, Heterosis
Full paper in Arabic: pdf