Deveropment of new homebred chicken for producing eggs and meats
2018
Takatsuaka, M. (Fukui Prefectural Livestock Experiment Station (Japan)) | Kato, T. | Yosida, Y.
The purpose of this experiment is deveropment of highly profitable new homebred chicken for producing eggs and meats of taste preferred by citizens in Fukui Prefecture. Candidate of mating system: Uemichired(♂) × Okazakiouhan(♀) (Okazaki F1), Uemichired(♂) × Nagoya(♀) (Nagoya F1). Uemichired(♂) × Nagoya(♀) (Nagoya F1). We tried to sexing of inception chicks according to the feature of the feather or body color. Then, to investigate market date having highest productivity and the most preferred taste, we collected date of egg-laying rate, the quality of eggs, the weight of boneless breast and bornless leg, the physical property of meat, and performed sensory evaluation at 300 days old, 400 days old, and 500 days old. In this experiment, to reduce production cost we substituted feed mixture with 20 percent unhulled rice. As a result, Okazaki F1 has a high probability and easy discrimination between sexes was possible. When breeding until 500 days of age, both Okazaki F1 and Nagoya F1 had an egg-laying rate of 80% or more. The Hough unit value of Nagoya F1 at 500 days of age remarkably decreased. Revenues from egg production were highest at 500 days of age shipment. The total amount of the meat was heavier at Nagoya F1, but the proportion of leg meat was not different. The shear titer was higher in Okazaki F1 at 400, 500 days of age. The glutamate content tended to be higher in Okazaki F1 at 500 days of age. Sensory evaluation showed no difference between both species at 500 days of age. From the above results it is recommended that Okazaki F1 be new chicken and ship at 500 days of age.
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