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Genetic parameter estimates for alternative growth traits and their relationship with the absolute and relative growth rates of Thai black-bone chickens |
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| รหัสดีโอไอ | |
| Creator | Panuwat Khumpeerawat |
| Title | Genetic parameter estimates for alternative growth traits and their relationship with the absolute and relative growth rates of Thai black-bone chickens |
| Contributor | Suppasit Plaengkaew, Kenneth J. Stalder |
| Publisher | Asia-Pacific Journal of Science and Technology |
| Publication Year | 2565 |
| Journal Title | Asia-Pacific Journal of Science and Technology |
| Journal Vol. | 27 |
| Journal No. | 5 |
| Page no. | 8 |
| Keyword | Absolute growth rate, Thai black-bone chicken, Correlations, Heritability, Relative growth rate |
| URL Website | https://www.tci-thaijo.org/index.php/APST |
| Website title | https://so01.tci-thaijo.org/index.php/APST/article/view/261630/ |
| ISSN | 2539-6293 |
| Abstract | The objective of this study was to estimate the genetic parameters for alternative growth traits including age at the inflection point (TI), weight at the inflection point (WI), and maximum increment (MI), and their relationship with the absolute growth rate (AGR) and relative growth rate (RGR) of Thai black-bone chickens (KU-Phuparn). Three non-linear models (Gompertz, Logistic, and von Bertalanffy) were fitted to measure the body weight of 2,933 Thai black-bone chicken from hatch to 12 weeks of age. The coefficients of determination (R2), root mean squared error (RMSE), and mean absolute error (MAE) were used to determine the most appropriate model. Alternative growth traits for each bird, including the coordinates for TI, WI, and MI, were calculated using the individual growth curve parameter from the best non-linear model. Genetic parameters for AGR, RGR, TI, WI, and MI traits were estimated by the average information restricted maximum likelihood algorithm. Heritability estimates for AGR and RGR were moderate to high, whereas low heritability values were observed for the alternative growth traits. The genetic correlations among the alternative growth traits were low to high and positive (0.06 to 0.94). A moderate genetic correlation between AGR and RGR was observed. Genetic correlations between the alternative growth traits (TI and WI), AGR, and RGR were low (<0.7). The results of this study reveal that selection for the alternative growth traits TI and WI could be included in the breeding objectives for Thai black-bone chickens when selecting animals for both age and weight simultaneously is desired. |
