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Title: Genetic parameters and inbreeding effects for production traits of Thai native chickens
Contributor(s): Tongsiri, Siriporn  (author); Jeyaruban, Gilbert M  (author)orcid ; Hermesch, Susanne  (author)orcid ; van der Werf, Julius H J  (author)orcid ; Li, Li  (author)orcid ; Chormai, Theerachai (author)
Publication Date: 2019-07
Early Online Version: 2019-01-02
Open Access: Yes
DOI: 10.5713/ajas.18.0690Open Access Link
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Abstract: Objective: Estimate genetic parameters, the rate of inbreeding, and the effect of inbreeding on growth and egg production traits of a Thai native chicken breed Lueng Hang Kao Kabinburi (LHKK) housed under intensive management under a tropical climate. Methods: Genetic parameters were estimated for weight measured at four weekly intervals from hatch (BWID) to 24 (BW24) weeks of age, as well as weight at first egg (BWFE), age at first egg (AFE), egg weight at first egg (EWFE) and total number of eggs produced during the first 17 weeks of lay (EN) using restricted maximum likelihood (REML). Inbreeding depression was estimated using a linear regression of individual phenotype on inbreeding coefficient. Results: Direct additive genetic effect was significant for all traits. Maternal genetic effect and permanent environmental hen effects were significant for all early growth traits, expect for BW24. For BW24, maternal genetic effect was also significant. Permanent environmental hen effect was significant for AFE. Direct heritabilities ranged from 0.10 to 0.47 for growth traits and ranged from 0.15 to 0.16 for egg production traits. Early growth traits had high genetic correlations between them. The EN was lowly negatively correlated with other traits. The average rate of inbreeding for the population was 0.09% per year. Overall, the inbreeding had no effect on body weight traits, except for BW1D. An increase in inbreeding coefficient by 1% reduced BWID by 0.09 g (0.29% of the mean). Conclusion: Improvement in body weight gain can be achieved by selecting for early growth traits. Selection for higher body weight traits is expected to increase the weight of first egg. Due to low but unfavorable correlations with body weight traits, selection on EN needs to be combined with other traits via multi-trait index selection to improve body weight and EN simultaneously.
Publication Type: Journal Article
Source of Publication: Asian-Australasian Journal of Animal Sciences, 32(7), p. 930-938
Publisher: Asian-Australasian Association of Animal Production Societies
Place of Publication: Republic of Korea
ISSN: 1976-5517
Fields of Research (FoR) 2008: 070201 Animal Breeding
Fields of Research (FoR) 2020: 300305 Animal reproduction and breeding
Socio-Economic Objective (SEO) 2008: 830309 Poultry
Socio-Economic Objective (SEO) 2020: 100411 Poultry
Peer Reviewed: Yes
HERDC Category Description: C1 Refereed Article in a Scholarly Journal
Appears in Collections:Animal Genetics and Breeding Unit (AGBU)
Journal Article
School of Environmental and Rural Science

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