Faten alsafadi*(1), Abdel Mohsen Marie(2), Ramzi Murshid(3) and Hesham Alatwani(1)
(1) Sweida Research Center, General Commission for Scientific Agricultural Research (GCSAR), Syria.
(2) General Commission for Scientific Agricultural Research, Damascus, Syria.
(3) Department of Horticulture Science, Faculty of Agriculture, University of
Damascus, Damascus, Syria.
(*Corresponding author: Dr. Faten alsafadi. E-Mail. f.alsafadi@gmail.com).
Received: 25/11/2021 Accepted:17/01/2022
Abstract:
This study was conducted at GCSAR-Swaida research center (Hout station) during the season 2018-2019, to evaluate six melon inbred lines and their 30 F1 hybrids produced by complete diallel mating design, using RCBD with four replications, to study genetic indicators as (Broad and narrow sense Heritability, Degree of dominance, Genetic Advance, Genotypic and Phenotypic coefficients of variations) for some fruit quality traits of melon (fruit pulp thickness, dry matter%, total soluble solids%, total sugar%, monosaccharides%, disaccharides%, carotenoids, vitamin C). The results showed that the additive variance was less than dominance variance for all studied traits, except the fruit content of carotenoids, since the degree of dominance was higher than 1 for these traits, this is indicating the importance of non-additive effects in the inheritance of these traits. While, the fruit content of carotenoids was under control of both additive and non-additive variance, and the degree of dominance was close to 1. The Estimates of the broad sense heritability was high in all traits On the other hand, the narrow sense heritability was an intermediate estimate for fruit content of carotenoids associated with a high genetic advance, and intermediate estimate for total soluble solids associated with low genetic advance. The results showed that the estimated of the phenotypic coefficient of variation are higher than the genetic coefficient of variation for all fruit quality traits. The phenotypic coefficient of variation reached the highest value for the characteristic of the fruit content of disaccharides% (49.016%), and the coefficient of genetic variation, it reached high estimates for the fruit content of disaccharides% and fruit content of carotenoids, and intermediate for the fruit content of vitamin C and dry matter%, and low for the rest of the traits.
Keywords: Degree of dominance, Genetic Advance, Genotypic coefficients of variations (GCV), Heritability, Melon, Cucumis melo L., Phenotypic coefficients of variations (PCV).
Full paper in Arabic: pdf