Table 1 Genotype and allele frequencies of the TYRP1 c.1484_1489del (p.M495_G496del) mutation in Chinese and European pig breeds

Breed	Coat colour	No.	Genotype			The del frequency
			+/+	+/del	del/del
Chinese breed
Tibetan	Reddish brown	51	0	51	0	0.50
	Silver brown	5	0	0	5	1.00
	Black	103	103	0	0	0.00
Kele	Dark brown	27	0	27	0	0.50
	Pale brown	2	0	0	2	1.00
	Black	57	57	0	0	0.00
Dahe	Black brown	10	0	10	0	0.50
	Yellow brown	21	0	21	0	0.50
	Silver brown	5	0	0	5	1.00
Dianan small ear	Black	31	31	0	0	0.00
Erhualian	Black	31	31	0	0	0.00
Hetao large ear	Black	32	32	0	0	0.00
Jinhua	Two-end-black	33	33	0	0	0.00
Laiwu	Black	32	32	0	0	0.00
Luchuan	Black with white belly	34	34	0	0	0.00
New Dahe	Black	44	44	0	0	0.00
Rongchang	White	34	34	0	0	0.00
Yushan	Black	31	31	0	0	0.00
Wuzhishan	Black with white belly	32	32	0	0	0.00
Wild boars	Wild type	72	72	0	0	0.00
European breed
Berkshire	Black	4	4	0	0	0.00
British Lop	White	1	1	0	0	0.00
Chester White	White	2	2	0	0	0.00
Duroc	Red	67	67	0	0	0.00
Hampshire	White belt and black body	42	42	0	0	0.00
Iberian	Black	10	10	0	0	0.00
Landrace	White	39	39	0	0	0.00
Large Black	Black	2	2	0	0	0.00
Large White	White	64	64	0	0	0.00
Mid White	White	2	2	0	0	0.00
Old Spot	Spotted	2	2	0	0	0.00
Pietrain	Spotted	27	27	0	0	0.00
Saddle Back	White belt and black body	1	1	0	0	0.00
Tamworth	Tan and black	1	1	0	0	0.00
Yorkshire	White	2	2	0	0	0.00
Wild boars	Wild type	13	13	0	0	0.00

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