Genome-wide association and genomic prediction for host response to porcine reproductive and respiratory syndrome virus infection

Table 2 Trait means and estimates (±SE) of heritability and litter effects (proportions of phenotypic variance) for virus load and weight gain after infection obtained from single trait pedigree-based ASREML analyses

Trait¹	n	Mean	SD²	Heritability	Litter	Phenotypic correlation	Genetic correlation
VL, units	1416	106.9	7.34	0.44 ± 0.13	0.09 ± 0.05
						-0.29 ± 0.03	-0.46 ± 0.20
WG42, kg	1373	14.4	4.03	0.29 ± 0.11	0.12 ± 0.05

¹VL viral load calculated as area under the curve of log-transformed viremia between 0 and 21 dpi and WG42 weight gain from 0 dpi to 42 dpi; ²standard deviation calculated as the square root of the sum of animal, litter, and residual variances from the joint ASREML analysis of all 8 trials.

ISSN: 1297-9686