This file explains all of the variables for the SNP genotype datasets that accompany: Congenital idiopathic megaesophagus in the German shepherd dog is a sex-differentiated trait and is associated with an intronic variable number tandem repeat in Melanin-Concentrating Hormone Receptor 2. S Bell, J Evans, K Evans, K Tsai, R Noorai, T Famula, D Holle, LA Clark

# the SNP genotypes (Clark_PLOSGen_CIM_GSD_SNPGenotypes.ped) and map (Clark_PLOSGen_CIM_GSD_SNPGenotypes.map) files are in PLINK format

dataset: Clark_PLOSGen_CIM_GSD_SNPGenotypes.ped
column 1	=	Family ID (set to missing "0")
column 2	=	Dog ID
column 3	=	Sire ID (set to missing "0")
column 4	=	Dam ID (set to missing "0")
column 5	=	Sex (1 = male, 2 = female)
column 6	=	Affection (1 = unaffected, 2 = CIM-affected)
columns 7 - 220859	=	Genotypes (nucleotide coding)


dataset: Clark_PLOSGen_CIM_GSD_SNPGenotypes.map 
column 1	=	Chromosome
column 2	=	SNP ID
column 3	= 	Physical map position
column 4	=	Position in bp