Mapping quantitative trait loci (QTL) in sheep. II. Meta-assembly and identification of novel QTL for milk production traits in sheep

Table 4 Summary of significant QTL for lactation traits using QTL Express under a two QTL model

OAR	Trait	Position [cM]		QTL effect ± SE		Var¹ [%]	F-value		Sign²
		QTL A	QTL B	QTL A	QTL B		2 vs0	2 vs 1	2vs0	2vs1
9	UP	12	124	-0.5 ± 0.2	-0.4 ± 0.1	7.8	7	7	*	*
17	SCC	32	72	216 ± 71	346 ± 87	8.4	8	8.4	**	**
26	PP	4	60	-0.1 ± 0.1	0.1 ± 0.1	7.9	7.2	7.8	*	*

Shown are the peak position of QTL A and QTL B for useful yield (UP) and protein (PP) content and somatic cell count (SCC); the QTL effect and the standard error (SE) of both QTL positions QTL A and QTL B (positions of each QTL are described by the average position in cM and further by the confidence interval from the bootstrapping analysis); ¹variance of the phenotype explained by the QTL, ²significant threshold of the F-value (sign threshold) determines if the QTL reached the significance level under 2 vs 0 QTL (2 degrees of freedom), or 2 vs 1 QTL (1 degree of freedom); with *chromosome-wide P < 0.05; **chromosome-wide P < 0.01

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