Performance of Laying Period of Two-way Crossbreed Parent Stock to Produce Laying-type Korean Native Commercial Chickens
2012
Kim, C.D., National Institute of Animal Science, RDA, Seonghwan, Republic of Korea | Choo, H.J., National Institute of Animal Science, RDA, Seonghwan, Republic of Korea | Kang, B.S., National Institute of Animal Science, RDA, Seonghwan, Republic of Korea | Kim, H.K., National Institute of Animal Science, RDA, Seonghwan, Republic of Korea | Heo, K.N., National Institute of Animal Science, RDA, Seonghwan, Republic of Korea | Lee, M.J., National Institute of Animal Science, RDA, Seonghwan, Republic of Korea | Son, B.R., National Institute of Animal Science, RDA, Seonghwan, Republic of Korea | Suh, O.S., National Institute of Animal Science, RDA, Seonghwan, Republic of Korea | Choi, H.C., National Institute of Animal Science, RDA, Seonghwan, Republic of Korea | Hong, E.C., National Institute of Animal Science, RDA, Seonghwan, Republic of Korea
This study was carried out to investigate the performance of laying period of two-crossbred of Korean native chickens for producing laying hens. A total of four hundred eighty female 2-crossbred chicks that restored strains and were aboriginal at National Institute of Animal Science. There were four crossbreds (4 replications/crossbred, 30 birds/ replication) as A) C strain × Y strain, B) C strain × L strain, C) C strain × G strain, and D) C strain × W strain, respectively. There were no significant difference on age at first egg among crossbreds (P greater than 0.05). Egg weight and body weight of B crossbred at first egg was higher than other crossbreds (P less than 0.05). Body weight of B crossbred was the highest 20 to 72 weeks (P less than 0.05), and C and D crossbreds were lower compared to A and B crossbreds (P less than 0.05). Average feed intake of B crossbred was the highest among crossbreds (P less than 0.05), and that of A crossbred was higher compared to C and D crossbreds (P less than 0.05). Weekly feed intake of four crossbreds decreased from 50 weeks. Weekly egg weight of B crossbred was the highest and that of D crossbred was the lowest among crossbreds (P less than 0.05). Feed conversion ratio of A and B crossbreds was lower than that of C and D crossbreds. Hen-house egg production of C crossbred was the highest among crossbreds until 26 weeks old (P less than 0.05), but there was no significant difference among crossbreds from at the age of 26 weeks (P greater than 0.05). Hen-day egg production decreased after at the age of 38 weeks. Weekly egg production of A and B crossbreds was higher compared to C and D crossbreds at the age of 68~72 weeks (P less than 0.05). These results suggested the basic data on the record of laying period of 2-crossbreed Korean Native Chickens for producing laying hens.
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