Diallel Analysis and Heritability of Fruit Quality Traits in Melon (Cucumis Melo L.) Inbred Lines
The present study was conducted at Swaida agricultural research center, Syria, during the season 2019, to estimate the genetic components of six melon (Cucumis melo L.) inbred line and their 30 F1s hybrids produced by complete diallel mating design, to evaluate some fruit quality traits (dry matter, total soluble content TSS, total sugar, carotene, and vitamin C) using Hyman analysis approach. The results showed that all the studied traits were controlled by overdominant gene effect, and most of the parents carried more dominant genes than recessive, since the variation components due to non-additive effects of genes (H1) was greater than the variation due to additive effects of genes (D) for all studied traits. The low values of narrow-sense heritability indicating the importance of the non-additive gene effect for the studied traits. According to the values of the variance and covariance for parents with their offspring (Wr+Vr) showed that P5 (IL-CM116) carried the most dominant genes for most of the studied traits, while P2 (IL-CM106) have the most recessive genes for all studied traits
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