Survival analysis and its correlation with body weight and Average Daily Gain traits in Japanese quail

Articles in Press

Document Type : (original research)

Authors

1 Department of Animal Sciences, Faculty of Agriculture, University of Zabol, Zabol-Iran

2 Department of Animal Science, Faculty of Agriculture, University of Zabol, Zabol, Iran

3 Research Center of Special Domestic Animals, University of Zabol, Zabol, Iran

4 Department of Animal Science, Khorasan Razavi Agricultural and Natural Resources Research and Education Center, AREEO, Iran.

10.22034/aej.2020.246125.2337

Abstract

The aim of this study was to analyze survival and its relationship with body weight and average daily gain traits in Japanese quail. For this purpose, Data base with 1854 Japanese quail survival records were used which collected during 4 generations from 1396 to 1398, by Khorasan Razavi Agricultural and Natural Resources Research and Education Center. The Survival and cmprsk statistical packages were employed to determine the non-genetic effects on survival and culling risk at different times, and variance components estimates of survival trait was performed by MCMCglmm package. Genetic parameters of traits were estimated using single and two-trait analyses via Gibbs sampling. The mean mortality of breeding period (0.206) and the average survival rate (0.793) were calculated. The estimated average heritabilities for survival in single and two-trait analyses were 0.216 and 0.153, respectively. The range of heritability of body weight in single trait analysis was estimated between 0.135 to 0.307) with a mean of 0.219 by two- trait analysis. In two-trait analysis, heritability of body weight trait ranged from 0.155 to 0.014. The highest genetic correlation was -0.3113 (between body weight and average daily gain) and the lowest genetic correlation was -0.0277 (between survival trait and average daily gain). The results showed that optimal management of environmental factors is effective in reducing the culling risk and genetic selection for survival trait can improve the genetic potential of survival.

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Journal of Animal Environment

Articles in Press, Corrected Proof
Available Online from 04 October 2021

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