. 2009 Mar 2;10:96. doi: 10.1186/1471-2164-10-96

Table 1.

Variance components of gastrointestinal nematode burden in Dutch Holstein-Friesian dairy cattle.

	Phenotype
Random effect	LEPG	LLPG
		*Bun.*	*C.onc.*	*C.pun.*	*Hae.*	*Oes.*	*Ost.*	*Tric.*	TOT
Animal ( $σ_{A}^{2}$ / $σ_{P}^{2}$ ) (Stand.error)	0.21 (0.05)	0.00 (0.02)	0.07 (0.04)	0.05 (0.03)	0.25 (0.05)	0.03 (0.03)	0.06 (0.03)	0.00 (0.02)	0.12 (0.04)
Herd ( $σ_{H}^{2}$ / $σ_{P}^{2}$ ) (Stand.error)	0.21 (0.02)	0.12 (0.03)	0.05 (0.02)	0.07 (0.03)	0.34 (0.02)	0.28 (0.03)	0.05 (0.02)	0.10 (0.02)	0.12 (0.02)
$σ_{P}^{2}$	0.212	0.000	0.103	0.026	0.137	0.017	0.105	0.015	0.226

$σ_{P}^{2}$ : phenotypic variance; $σ_{A}^{2}$ : additive genetic variance; $σ_{H}^{2}$ : variance due to the herd effect.

LEPG: log₁₀(EPG+1) where EPG = eggs per gram of faeces; LLPG: log₁₀(LPG+1) where LPG = number of larvae per gram of faeces. Bun.: Bunostomum sp.; C.onc.: Cooperia oncophora; C.punc.: Cooperia punctata; Hae.: Haemonchus sp.; Oes.: Oesophagostomum sp.; Ost.: Ostertagia sp.; Tri.: Trichostrongylus sp.; TOT: sum over all species.