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http://dx.doi.org/10.5536/KJPS.2021.48.4.177

Effects of Early- and Late-Feathering Phenotypes on Growth Performance and Mortality in Korean Native Commercial Chickens  

Sohn, Sea Hwan (Department of Animal Science and Biotechnology, Gyeongsang National University)
Choi, Eun Sik (Department of Animal Science and Biotechnology, Gyeongsang National University)
Cho, Eun Jung (Department of Animal Science and Biotechnology, Gyeongsang National University)
Kim, Bo Gyeong (Department of Animal Science and Biotechnology, Gyeongsang National University)
Publication Information
Korean Journal of Poultry Science / v.48, no.4, 2021 , pp. 177-184 More about this Journal
Abstract
Sex identification in day-old chicks is essential in the poultry industry. Currently, the feather-sexing using a sex-linked inheritance is a chick sexing method used extensively in the poultry industry. For chicks produced by feather-sexing, all females are early-feathering (EF) chicks and all males are late-feathering (LF) chicks. Therefore, investigating the effects of EF and LF phenotypes on production traits of chickens is critical. The purpose of this study was to analyze and compare the production performance between EF and LF chickens in Korean native commercial chickens. The results showed that the survival rate of the EF chickens was significantly higher than that of the LF chickens, from hatching to 12 weeks of age (P<0.05), with the highest difference observed in females. However, no significant difference was observed in body weight between the EF and LF chickens at almost all ages. In addition, no significant difference was observed between in feed utility, such as average daily feed intake and feed conversion ratio, between the EF and LF groups. In conclusion, although the survival rate of early-feathering chickens was superior to that of late-feathering chickens, no significant difference was observed in growth performance and feed utility among Korean native chickens. The results suggest that production capacity is not influenced by feathering type in the establishment of a breeder structure and production system for feather-sexing Korean native chickens, which is valuable for the practical application of feather-sexing in the poultry industry.
Keywords
Korean native commercial chickens; early-feathering; late-feathering; mortality; growth performance;
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Times Cited By KSCI : 1  (Citation Analysis)
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