Hasan Asad^1*, Hassan Khojah ² and Ghaitha Hasan¹

1 General Commission for Scientific Agricultural Research, Tartous Research Center, Syria
2. Department of Horticulture, Faculty of Agriculture, Lattakia University, Syria

(*Corresponding author: Hasan Asad, Email: ashsn132@gmail.com , Tel: 0994137992).

Received: 27/ 5/ 2025       Accepted: 8/ 10/ 2025

Abstract

This research was carried out at Tartous Agricultural Scientific Research Center in Al-Jamasa Research Station, during two seasons (2020, 2021) and (2021 2022), under protected cultivation. By using randomized complete block design (RCBD) in three replications. Six genetic types of eggplant used as parents (T1, T2, T3, T4, T5, T6). The objective was to determine the effect of heterosis in first filial generation F1 of some fruit quality parameters (Yield/pl, total sugar%, soluble solids material%, acid percentage%, dry material%, and degree hardness kg/cm2 of fruit). Hybridization was conducted by half-diallel crossing scheme to obtain (15) hybrids for all crosses. The results showed highly significant differences between the parental types for all the studied traits. The hybrid (T3× T5) had the highest significant value of heterosis (24.998**) for yield/pl. The fourth hybrid (T1× T5) gave significantly the highest value of heterosis for total sugar percentage (%23.655**). The third hybrid (T1× T4) showed the highest value for soluble solids material percentage (9.414**%), also the second hybrid (T1× T3) for acid percentage (%- 9.942**). The hybrid (T3× T5) for dry material (%15.237**), and hybrid (T5× T6) showed the highest significant value of heterosis for degree hardness of fruit (22.258**) kg/cm².

Keywords: Eggplant, Half-diallel crosses, Heterosis, Protected cultivation.

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