Table 3 . Single QTL mapping.

Phenotype	Chr.	Position (cM)	LOD scorea	Position (Mb)	1.5 LOD Int (Mb)	DDb	DCb	CCb
Rel. right testis weight	2	47.5	4.10	80.7	64.1−122.2	3.12 (±0.12)	3.40 (±0.08)	3.64 (±0.11)
	4	30	3.74	69.9	30.3−118.7	3.53 (±0.12)	3.53 (±0.09)	2.93 (±0.15)
Sperm density	X	58	3.75	141.7	87.3−162.9	14.68 (±0.68)	—	10.643 (±0.792)
Sperm density (binary)	X	6	3.13	21.8	10.2−48.6	0.98 (±0.03)	—	0.86 (±0.03)
Sperm head PC1c	2	96	4.35	177.5	149.1−179.0	−0.01 (±0.01)	−0.01 (±0.004)	0.02 (±0.01)
	X	56	3.79	137.9	10.2−162.9	−0.01 (±0.004)	—	0.01 (±0.004)
Sperm head PC2c	M/Y	0	11.07	—	—	0.02 (±0.003)	—	−0.01 (±0.002)
	X	16	10.85	41.3	21.8−100.7	−0.01 (±0.002)	—	0.01 (±0.003)
Semin. tubule aread	2	44	7.78	75.6	57.4−105.0	2401.97 (±661.27)	268.68 (±442.59)	−2637.73 (±643.27)
	8	60.6	4.53	125.0	112.7−130.8	1373.74 (±568.94)	266.27 (±404.28)	−2399.04 (±611.15)
	X	69.1	4.70	162.9	141.7−162.9	1174.16 (±388.86)	—	−1675.42 (±457.60)
Prox. bent taile	X	60	3.33	145.5	93.9−162.9	0.19 (±0.01)	—	0.24 (±0.01)
Headless/taillesse	X	48	10.12	113.5	57.6−133.6	0.33 (±0.01)	—	0.44 (±0.02)
Amorph. sperm heade	2	86	4.95	169.1	133.7−177.5	0.13 (±0.01)	0.16 (±0.01)	0.21 (±0.01)
	9	2	8.13	14.4	3.1−29.8	0.16 (±0.01)	0.14 (±0.01)	0.23 (±0.01)
	X	40	3.53	93.9	45.1−162.9	0.14 (±0.01)	—	0.20 (±0.01)
Total abnormal sperme	X	50	9.60	120.2	93.9–141.7	0.44 (±0.02)	—	0.59 (±0.01)

^aAll QTL are significant at a 5% significance threshold.

^bPhenotype means of each genotype (±SE). D, M. m. domesticus^WSB; M, M. m. castaneus^CAST.

^cTransformed to normal quantiles. Higher values of PC1 and PC2 are correlated with higher levels of sterility.

^dResidual trait scores of seminiferous tubule area regressed on testis weight. Lower values are correlated with higher levels of sterility.

^eArcsine squareroot transformed.