Table 2.

Definition of variables

Category	Variable name	Definition
Biological	MD	Male cM/Mb
property	FD	Female cM/Mb
	LK	Log (female cM/male cM)
	LM	Loci in linkage map/male cM
	LF	Loci in linkage map/female cM
	PD	Loci in linkage map/Mb
	PC	Principal component of above = 0.563 MD + 0.441 FD − 0.422 LK − 0.373 LM + 0.013 LF + 0.415 PD
Band	RBD	R-bands (1, 0) (ref. 18)
	GBD	G-band shades from light grey to black (2, 3, 4, and 5, elsewhere = 0) (ref. 18)
	POS	Midband position in range 0, 1, where 0 is the centromere and 1 the telomere
	TEL	Telomeric band (1, 0)
	HET	Variable centromeric heterochromatin (1, 0); acrocentric heterochromatin rejected
	CBD	Nonvariable C-band (1, 0)
	AVM	Centromeric band = 1 in acrocentrics, −1 in metacentrics, 0 elsewhere
Chromosome	CLG	Length of chromosome in Mb
	MCR	Acrocentric (0) or metacentric (1) chromosome