ÖZSOY, Abdullah Nuri Süleyman Demirel Üniversitesi - Ziraat Fakültesi - Zootekni Bölümü, Turkey

Estimation of Genetic and Phenotypic Parameters for Average Weekly Egg Weights of Japanese Quails (Coturnix coturnix japonica) Using Random Regression Model and Repeatability Model

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This study was conducted in the Animal Science Unit at Süleyman Demirel University, Faculty of Agriculture Department. In this study, eggs of 225 female Japanese quails were used. Quails were randomly selected from a population where a random mating plan was applied. During the period between 11 and 20 weeks of age, where a 1:1 mating ration was applied, data records concerning a total of 2139 eggs were subjected to the analysis of random regression and repeatability models. Heritabilities for average weekly egg weights were estimated between 0.20 – 0.60 from the random regression model and 0.40 from the repeatability model. Genetic correlations for egg weights were estimated between 0.86 and 1, and phenotipic correlations were calculated between 0.66 and 0.91 and, all were found significant (p 0.01). This study indicated that when a selection is to be made according to each of these models, approximately 90% of the same animals are expected to be chosen for breeding purposes.

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Japanese quail , genetic parameter , random regression model , repeatability model , egg weight

Journal Of The Faculty Of Agriculture, Suleyman Demirel University

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