Genomic prediction of survival time in a population of brown laying hens showing cannibalistic behavior

Table 7 Predicted accuracy and response to selection in survival time and rate of inbreeding

	Traditional	Genomic selection
Accuracy of males	0.77	0.42
Accuracy of females	0.16	0.42
Response to selection (days/year)	24.6	47.0
Rate of inbreeding (%) per generation (year)	2.75 (1.86)	0.75 (0.88)

Values refer to the Bulmer equilibrium; inputs are in Table 4
Additional inputs (unselected base population parameters averaged over lines are from Table 5): \(\hat{\varvec{\sigma }}_{\varvec{P}}^{2} =\) 11,500 days² and \(\varvec{h}^{2} =\) 0.20
For the GS scheme: genetic correlation between survival time and marker information \(\varvec{r}_{\varvec{g}} = 0.53\)
Corresponding phenotypic correlation \(\varvec{r}_{\varvec{p}} = \varvec{hr}_{\varvec{g}} = 0.24\)
Heritability marker information = 100 %, and phenotypic variance marker information = 646.7 days²; the latter is obtained as \(\varvec{r}_{\varvec{g}}^{2} \varvec{h}^{2}\varvec{\sigma}_{\varvec{P}}^{2} ,\) which causes the regression coefficient of the true breeding value for survival time on the marker-based EBV to be equal to 1. Note that this value does not impact response to selection in survival time. Further details are in [41, 42]

ISSN: 1297-9686