Reem Al-mansour(1)*, Thamer Hnesh(1), and Zenab Tadber (1)
(1). Crop research addminstration, General commission for scientific agricultural research,(GCSAR) Damascus, Syria.
(*Corresponding author: Reem Al-Mansour, E-Mail: reemalmansour2@yahoo.com)
Received date: 21/01/2021 Accepted date: 7/04/2021
Abstract
Field experiment was conducted at Homs Research Center, General Commission for Scientific Agricultural Research during 2015, 2016 to estimate the combining ability for six inbred lines of maize, three of them were sensitive {P1 (IL-197, P2 (IL-90), P3 (IL-29)} and the others were tolerant to drought stress {P4 (IL-200), P5 (IL-339), P6 (IL-239)}. The resultant hybrids were evaluated under well watered and drought conditions applied at tasseling by using Randomized Complete Block Design (RCBD) with three replications. The significant variation in the combining ability indicated the importance of both additive and non-additive gene actions in the inheritance of leaf area, leaf area index, net assimilation rate, and grain yield under both conditions. Also results showed the predominance of additive gene action, non-additive gene action under well watered and drought conditions respectively for these traits, except the grain yield trait which showed the predominance of non-additive gene action under both conditions. High narrow sense heritability for leaf area index indicated the importance of this trait in the selection for high grain yield.
Key words: Maize, General combining ability, Specific combining ability, Drought stress, Heritability.
Full paper in Arabic: pdf