Table 7. Comparison of egg shape between crossbred Korean native chickens and Hy-Line Brown at 64 weeks¹

Items	Treatments²													SEM³	P-value
Items	CFCK	CFYC	CFYD	CKCF	CKYC	CKYD	YCCF	YCCK	YCYD	YDCF	YDCK	YDYC	Hy-Line Brown	SEM³	P-value
Egg width (mm)	43.91^b	38.02^a	44.27^bc	46.53^cd	43.89^b	43.62^b	43.34^b	43.29^b	43.63^b	38.07^a	43.70^b	46.96^d	45.21^bcd	0.149	<0.001
Egg length (mm)	58.06^b	51.57^a	58.64^b	61.82^c	59.18^bc	57.21^b	58.05^b	57.24^b	57.70^b	51.65^a	56.74^b	58.10^b	58.06^b	0.173	<0.001
Egg shape index (%)	75.71	73.92	75.66	75.45	74.23	76.38	74.74	75.80	75.74	73.89	77.23	78.38	77.95	0.392	0.437
Egg weight (g)	59.94^abc	55.70^ab	59.82^abc	58.42^ab	60.98^abc	56.82^ab	58.45^ab	56.02^ab	55.46^a	56.76^ab	56.98^ab	61.49^bc	64.87^c	0.34	<0.001
Eggshell weight (g)	7.12^abc	6.50^ab	7.00^abc	7.22^bcd	7.41^cd	7.00^abc	7.29^bcd	6.92^abc	6.71^abc	6.29^a	6.56^abc	8.04^de	8.35^e	0.051	<0.001
Albumen weight (g)	30.20^a	27.80^a	31.05^a	30.62^a	31.30^a	29.86^a	38.06^b	30.85^a	29.81^a	28.94^a	29.43^a	29.04^a	31.66^a	0.232	<0.001
Yolk weight (g)	21.63^bc	18.88^ab	20.78^bc	19.6^abc	20.54^bc	19.09^abc	19.52^abc	19.51^abc	21.68^c	19.56^abc	19.89^abc	20.09^bc	17.28^a	0.157	<0.001
Eggshell ratio (%)	11.88^abc	11.73^abc	11.68^abc	12.38^abc	12.18^abc	12.30^abc	12.50^abc	12.37^abc	12.33^abc	11.15^a	11.55^ab	13.09^c	12.90^bc	0.086	0.002
Albumen ratio (%)	50.46^a	49.83^a	51.84^a	52.38^a	51.30^a	52.05^a	52.68^a	53.15^a	53.14^a	51.85^a	50.89^a	51.53^a	58.58^b	0.308	<0.001
Yolk ratio (%)	35.99^bc	33.99^b	34.84^b	33.66^b	33.80^b	34.10^b	33.53^b	34.93^b	39.43^c	34.51^b	34.97^bc	32.69^b	26.69^a	0.256	<0.001

Values in a row with different superscripts differ significantly (P<0.05).
Results are mean with 6 replicates per strain.
C, D: Korean Rhode Island; F, K: Korean Leghorn; Y: Korean domestic chicken.
SEM, standard error of means.