Table 4. Egg production performance of the 12 Korean domestic chickens

Varieties	Age at first egg laying (days)	Hen-day egg production (first egg-57 wks, %)	Hen-housed egg production (first egg-57 wks, eggs)
Korean Rhode-C	123	38.0	97.1
Korean Rhode-D	123	38.2	101.7
Korean Leghorn-F	119	74.4	189.2
Korean Leghorn-K	125	76.7	197.2
Korean Cornish Black	140	22.2	53.3
Korean Cornish Brown	150	10.8	25.3
Korean Ogye	142	42.4	105.9
KNC Grayish-brown	138	36.6	92.3
KNC Black	129	35.8	91.4
KNC Reddish-brown	128	42.8	92.5
KNC White	128	48.3	129.3
KNC Yellowish-brown	122	43.4	109.1
Total	130.1	42.4	106.4