Table 1.

Genetic model for QTL affecting three body composition traits

Location	F ratio*			Inferred genetic model	Confidence interval†	QTL effect‡
	Paternal effect	Maternal effect	Dominance
Back fat thickness, mm
SSC2, 36 cM	24.07§	2.85	0.51	Paternal expression	0–73	0.95  (0.20)
SSC7, 57 cM	30.27§	49.35§	0.04	Mendelian expression	38–72	−2.30  (0.25)
Muscle depth, mm
SSC7, 56 cM	4.74	50.33§	2.20	Maternal expression	41–72	−1.69  (0.24)
Intramuscular fat content, %
SSC6, 23 cM	0.07	14.53§	0.00	Maternal expression	0–52	0.14  (0.04)
SSC6, 117 cM	14.71§	1.34	0.31	Paternal expression	90–150	−0.13  (0.03)

^*Partial F ratio for the individual components of a model including a paternal, maternal, and dominance component at the most likely position of the QTL. 

^†Empirical confidence intervals obtained by bootstrapping for the relevant model. 

^‡ Estimates of QTL effects for the inferred genetic model. The additive effect (Mendelian expression) and the paternal or maternal effect (imprinting) are expressed as the deviation of the Meishan allele (3, 19, 20). Standard errors of the estimates are in parentheses. 

^§P < 0.0001.