Mapping Quantitative Trait Loci (QTL) in sheep. III. QTL for carcass composition traits derived from CT scans and aligned with a meta-assembly for sheep and cattle carcass QTL

Table 3 Summary of significant QTL for carcass traits using QTL Express under a two-QTL model

OAR	Trait	Position QTL [cM] with flanking markers		F-value		Herit [%]⁴	QTL effect SD (SE)³
		A	B	2 vs 0¹	2 vs 1²		A	B
1	Carcass lean	40 BMS835-OARHH51	272 INRA011-BM6506	9.4*	8.7*	9.5	0.642 (0.218)	0.803 (0.258)
1	Percent bone in carcass	72 OARHH51-BM6465	216 MAF64-CSSM4	6.8*	7.3*	6.9	-74.3 (26.5)	102.2 (37.6)
9	Eye muscle area	72 ILST011-MAF33	76 MAF33-BMS1304	6.8*	6.8*	6.8	-0.0198 (0.0054)	0.0207 (0.0057)
18	Percent fat in carcass	80 BM7243-OARHH47	88 TGLA122-MCM38	6.0	8.1*	5.9	62.6 (18.2)	-55.7 (18.2)
19	Internal fat	80 OAFCB304-MCM111	88 MCM111-OARCP88	7.1*	11**	7.1	-3.54 (0.94)	3.35 (0.92)

¹F(2 versus 0) is F-statistic for testing two QTL vs no QTL on chromosome
²F(2 versus 1) is F-statistic for testing two QTL vs one QTL on chromosome
³standardised QTL effect (SD) = QTL Effect/Residual Std Dev; and the standard error (SE) of QTL positions A and B
⁴variance or QTL heritability as a proportion of the phenotypic variance accounted for by the QTL in %
* chromosome-wide P < 0.05; ** chromosome-wide P < 0.01

ISSN: 1297-9686