Razzan alnajjar * (1), Sameer Al-Ahmad⁽²⁾ , M. Al Debss ⁽¹⁾, and Samar Al-Ali ⁽³⁾

(1). Crops Research Administration, General Commission for Scientific Agricultural Research, Damascus, Syria.

(2). Researcher,  Agricultural Research Center,  Tartous, Syria.

(3).  Crop Research Department, General Authority for Scientific Agricultural Research.

(4). Researcher,  Agricultural Research Center,  Homs,  Syria.

(*Corresponding author: Dr. Razan alnajjar, E-Mailrazanhamoda2009@gmail.com).

Received: 28/03/2024               Accepted: 1/08/2024

Abstract 

This research was conducted to study the behavioral  of morphological and yield properties in a set of 15 F₁ hybrids of six inbred lines  of maize (Zea mays L.) were produced in 2020 at the Maize Researches Department and evaluated in 2021 at three locations Agriculture Scientific Research Center at ( karabo, Tartous, Homs). Mean squares of locations, hybrids and hybrids × locations were significant for all traits, it means that hybrid behavior change from location to another. Mean squares of general (GCA) and specific (SCA) combining ability confirm the high consequence of both additive and non-additive gene action on the inheritance of these traits. Also, interaction between GCA × locations and SCA × locations were significant for all studied traits. The σ²_GCA/σ²_SCA ratios showed that non-additive gene effects played major role in inheritance of silking date, plant height and ear height while, additive gene effects were the most important in inheritance of yield. GCA effects showed that the inbred lines P2 ، P1  ، P3 was good combiner for grain yield also, SCA effects indicated that the hybrids P1 × P4، P3 × P4 ، P4  × P، were the best combinations for grain yield.

Key words: Maize, half diallel cross, Combining ability, Genetic × Environments interaction.  

Full paper in Arabic: PDF