Comparison of Yield and Yield Characteristics in Different Rice Hybrids and Investigation of Their Inheritance
2025
Harun Akkurt | Halil Sürek | Fatma Aykut Tonk
The objective of this study was to determine the heterosis and heterobeltiosis values of yield components and some important traits in rice (Oryza sativa L.) and to estimate the narrow-sense heritability of these traits. For this purpose, in 2020, the F1 hybrid combinations of Halilbey x Aga, Halilbey x Gemici, and Halilbey x Vasco, obtained from the parental lines (Halilbey, Aga, Gemici, Vasco) used in hybridization, were cultivated in the Gönen district of Balıkesir. The transplanting method was used for planting. In the transplanting, one seedling was planted per each hill at a planting density of 25x25 cm. In this study, observations and measurements were made for the following characteristics%253A the flowering days, maturity days, plant height, panicle length, the number of panicles per plant, the number of grains per panicle, thousand-grain weight, and grain yield per plant. In the heterosis and heterobeltiosis evaluations, the highest heterosis and heterobeltiosis values were determined for panicle number per plant and rice yield per plant. High levels of narrow-sense heritability were estimated for the number of panicle, rice yield per plant, and maturity days, while moderate levels were determined for the plant height and thousand-grain weight, and low levels for flowering days, panicle length, and number of grains per panicle. The high levels of heterosis and heterobeltiosis observed in rice yield are attributed to the high levels of heterosis and heterobeltiosis in the number of panicle per plant. Additionally, this trait exhibits a high degree of narrow-sense heritability. Utilizing this trait in hybrid rice breeding could lead to increased yield.Therefor, this trait may be used as a selection criteria in heterosis breeding in rice. At the same time, flowering day and panicle length should be taken into accord in the selection.
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