Genetic evaluation of eggshell color based on additive and dominance models in laying hens
| Autor: | Meng Ma, Manman Shen, Dou Taocun, Qu Liang, Hu Yuping, Wang Kehua, Guo Jun |
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| Rok vydání: | 2020 |
| Předmět: |
0106 biological sciences
Layer Population lcsh:Animal biochemistry Biology Bayesian 010603 evolutionary biology 01 natural sciences Crossbreed Article Heritability Animal science Genetic variation Genetic Evaluation Eggshell Additive model education lcsh:QP501-801 lcsh:SF1-1100 education.field_of_study 0402 animal and dairy science 04 agricultural and veterinary sciences Animal Breeding and Genetics Eggshell Color Random effects model 040201 dairy & animal science Animal Science and Zoology lcsh:Animal culture Inbreeding Food Science |
| Zdroj: | Asian-Australasian Journal of Animal Sciences Asian-Australasian Journal of Animal Sciences, Vol 33, Iss 8, Pp 1217-1223 (2020) |
| ISSN: | 1976-5517 1011-2367 |
| DOI: | 10.5713/ajas.19.0345 |
| Popis: | Objective: Eggshells with a uniform color and intensity are important for egg production because many consumers assess the quality of an egg according to the shell color. In the present study, we evaluated the influence of dominant effects on the variations in eggshell color after 32 weeks in a crossbred population.Methods: This study was conducted using 7,878 eggshell records from 2,626 hens. Heritability was estimated using a univariate animal model, which included inbreeding coefficients as a fixed effect and animal additive genetic, dominant genetic, and residuals as random effects. Genetic correlations were obtained using a bivariate animal model. The optimal diagnostic criteria identified in this study were: L* value (lightness) using a dominance model, and a* (redness), and b* (yellowness) value using an additive model.Results: The estimated heritabilities were 0.65 for shell lightness, 0.42 for redness, and 0.60 for yellowness. The dominance heritability was 0.23 for lightness. The estimated genetic correlations were 0.61 between lightness and redness, –0.84 between lightness and yellowness, and –0.39 between redness and yellowness.Conclusion: These results indicate that dominant genetic effects could help to explain the phenotypic variance in eggshell color, especially based on data from blue-shelled chickens. Considering the dominant genetic variation identified for shell color, this variation should be employed to produce blue eggs for commercial purposes using a planned mating system. |
| Databáze: | OpenAIRE |
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