Table 4.

Summary of QTL identified for sex ratio and clutch size in Nasonia vitripennis. The most likely genomic locations are given as position along the chromosome. Significant QTLs at the 5% genome-wide level are given in bold type, and significant QTLs at the 5% chromosome-wide level are given in italic. Locations were determined in individual single-QTL models, whilst effect sizes were determined by simultaneously fitting all chromosome-wide significant QTL in one multiple-QTL model.

			Effect‡		Normalized QTL effect§
Trait	Chr*	Location†	High background	Low background	High background (%)	Low background (%)
Sex ratio	2	17.0	0.0147	0.0141	+8.8	+9.4
	3	53.0	0.0133	0.0127	+7.9	+8.4
	5	39.0	−0.0089	−0.0086	−5.3	−5.7
	5	79.2	−0.0059	−0.0056	−3.5	−3.7
Clutch size	1	35.4	−2.16	−2.19	−7.6	−7.5
	2	21.0	1.77	1.80	+6.2	+6.2
	2	32.0	0.06	0.06	+0.2	+0.2
	4	66.2	0.83	0.84	+2.9	+2.9
	4	83.0	1.30	1.32	+4.6	+4.5
	5	43.0	−1.05	−1.07	−3.7	−3.7
	5	76.0	−0.53	−0.54	−1.9	−1.9

QTL, quantitative trait locus.

^*Chromosome.

^†Location in centiMorgans.

^‡Estimated effect size of the QTL, calculated as the difference in sex ratio (or brood size) between sibships inheriting the high vs. the low allele from the recombinant F2 male.

^§Change relative to the mean in the high and low genetic backgrounds.