Table 1. Description and numbers of the 12 Korean domestic chicken varieties used in this study

Varieties*	Description of varieties	Number of chicken			Genetic origin (Breed)
		Female	Male	Total
Korean Rhode Island Red	Korean Rhode-C (C)	51	50	101	Rhode Island Red
	Korean Rhode-D (D)	53	50	103	Rhode Island Red
Korean White Leghorn	Korean Leghorn-F (F)	43	47	90	Leghorn
	Korean Leghorn-K (K)	45	60	105	Leghorn
Korean Black Cornish	Korean Cornish Black (H)	57	43	100	Cornish
Korean Brown Cornish	Korean Cornish Brown (S)	48	46	94	Cornish
Korean Ogye	Korean Ogye (O)	49	46	95	Indigenous Ogol
Hoegalsaek Jaerae-jong	KNC Grayish-brown (G)	39	50	89	Indigenous Korean native chicken
Heuksaek Jaerae-jong	KNC Black (L)	26	33	59	Indigenous Korean native chicken
Jeokgalsaek Jaerae-jong	KNC Reddish-brown (R)	50	53	103	Indigenous Korean native chicken
Baeksaek Jaerae-jong	KNC White (W)	49	41	90	Indigenous Korean native chicken
Hwanggalsaek Jaerae-jong	KNC Yellowish-brown (Y)	54	51	105	Indigenous Korean native chicken

Varieties are the registered names in DAD-IS.