Hasan Asad* (1), Hassan Khojah (2), and Ghaitha Hasan (1)
(1). General Commission for Scientific Agricultural Research (GCSAR), Tartous Research Center, Syria
(2). Assistant Professor, Department of Horticulture, Faculty of Agriculture, Tishreen University, Latakia, Syria
(*Corresponding author: Hasan Asad, Email: ashsn132@gmail.com , Mobile: 0994137992)
Received 31/3/2024 Accepted 11/7/2024
Abstract
The research was carried out at Al-Jammasa Research Station during (2020-2021, 2021-2022) seasons; to study the genetics behavior of some important specifications of eggplant fruits, based on appropriate genetic indicators. Six parents of protected cultivation types of eggplant were evaluated and their fifteen individual hybrids were hybridized by half-diallel reciprocal crossing., using a Randomized Complete Blocks Design (RCBD) with three replications, to study general and specific ability effects and dominance degree for some fruits quality (total sugars%, titratable acidity, total soluble solids, dry matter and firmness). The results showed highly significant differences between the parental types for all the studied traits except the acidity percentage%. The variances due to GCA and SCA were highly significant, which indicates that both additive and non-additive genes effects control these traits. But however, the ratio of GCA/SCA variance was greater than one (1) for all studied traits; This indicates that the contribution of additive effect genes was greater than of the non-additive effect genes. The average degree of dominance was less than one (1) in those traits. This also confirms the predominance of additive effect genes when these traits are inherited.
Keywords: Additive effect, Dominance, Eggplant, General ability, Protected cultivation, Specific ability.
Full paper in Arabic: PDF