Genetic parameters for growth and faecal worm egg count following Haemonchus contortus experimental infestations using pedigree and molecular information

Table 3 Ratios between the precision estimators for the PED model and for the SNPED model

Traits	ADG0	ADG1	FEC1	FEC2
ADG0	^SE1.12	-	^SE2.24	^SE2.25
ADG0	^CI1.42	-	^CI1.26	^CI4.21
ADG1	-	^SE1.23	^SE1.38	^SE1.26
ADG1	-	^CI2.37	^CI1.30	^CI1.57
FEC1	^SE1.37	^SE1.33	^SE1.72	^SE2.22
FEC1	^CI0.93	^CI0.98	^CI1.5	^CI2.2
FEC2	^SE1.73	^SE1.68	^SE1.76	^SE1.67
FEC2	^CI1.41	^CI1.30	^CI1.25	^CI1.9

ADG0 = average daily gain before infestation; ADG1 = average daily gain during the first infestation; FEC1 = faecal egg count during the first infestation; FEC2 = faecal egg count during the second infestation; the table shows both values of the ratio between the approximate standard errors (marked with superscript SE) and the ratios of the width of the confidence intervals obtained from the empirical distribution (marked with superscript CI) of the parameters estimates obtained by using either pedigree relationship matrix or the joint pedigree and molecular information relationship matrix; the ratios on the diagonal refer to the heritability estimates; the ratios above the diagonal refer to the genetic correlation estimates; the ratios below the diagonal refer to the phenotypic correlation estimates; the correlations between ADG0 and ADG1 were much more sensitive than others to the starting values used for the estimation and to re-sampling, and are not presented.

ISSN: 1297-9686