Received: 29-10-2021
Accepted: 27-05-2022
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Heterosis, and Combining Ability in Agronomic Traits of Melon Inbred Lines
Keywords
Heterosis, combining ability, Cucumis meloL., Cantaloupensis, Reticulatous
Abstract
This study evaluated the correlation, heterosis, and combining ability of ten melon lines using top cross mating design. Ten parental lines, two testers and twenty top cross hybrids with a check variety were evaluated in 2021 Autumn season in the nethouse at Vietnam National University of Agriculture. The result showed that marketable yield had a very strong positive correlation (P ≤0.001) with mean fruit weight (r = 0.998), fruit length (r = 0.772), fruit diameter (r = 0.957), and fruit flesh thickness (r = 0.845). Mid-parent heterosis and heterobeltiosis were observed in yield and yield-related traits while these values were negative for harvesting time. The highest general combining ability (GCA) in yield and mean fruit weight were observed in D17 and D26 lines, and the tester DT16. D20 has the highest GCA value on total soluble solid content. The crosses DT16×D17, DT16×D01, and DT16×D26 had the highest marketable yield. The additive effect plays a larger genetic role in the control of yield traits while the dominant effect plays a larger genetic role in the control of quality traits in melon.
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