Tongsiri, Siriporn; Jeyaruban, Gilbert M; Hermesch, Susanne; van der Werf, Julius H J; Li, Li; Chormai, Theerachai

Author(s)

Tongsiri, Siriporn

Jeyaruban, Gilbert M

Hermesch, Susanne

van der Werf, Julius H J

Li, Li

Chormai, Theerachai

Publication Date

2019-07

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.

Citation

Asian-Australasian Journal of Animal Sciences, 32(7), p. 930-938

ISSN

1976-5517

1011-2367

Pubmed ID

30744369

Link

https://hdl.handle.net/1959.11/27102

Publisher

Asian-Australasian Association of Animal Production Societies

Rights

Attribution 4.0 International

Title

Genetic parameters and inbreeding effects for production traits of Thai native chickens

Type of document

Journal Article

Entity Type

Publication

Author(s)	Tongsiri, Siriporn Jeyaruban, Gilbert M Hermesch, Susanne van der Werf, Julius H J Li, Li Chormai, Theerachai
Publication Date	2019-07
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.
Citation	Asian-Australasian Journal of Animal Sciences, 32(7), p. 930-938
ISSN	1976-5517 1011-2367
Pubmed ID	30744369
Link	https://hdl.handle.net/1959.11/27102
Publisher	Asian-Australasian Association of Animal Production Societies
Rights	Attribution 4.0 International
Title	Genetic parameters and inbreeding effects for production traits of Thai native chickens
Type of document	Journal Article
Entity Type	Publication

Genetic parameters and inbreeding effects for production traits of Thai native chickens

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