Using egg production longitudinal recording to study the genetic background of resilience in purebred and crossbred laying hens

Table 1 Phenotypic means and standard deviations (SD) of the four analyzed traits in purebreds and crossbreds from the WA and BD lines

Traits	Type	WA line		BD line
Traits	Type	Mean	SD	Mean	SD
EP	Purebred	371	51	347	69
EP	Crossbred	368	24	341	36
LNVAR	Purebred	− 0.81	0.94	− 0.33	1.09
LNVAR	Crossbred	− 2.32	0.73	− 1.84	0.64
SKEW	Purebred	− 1.51	1.03	− 1.20	1.15
SKEW	Crossbred	− 0.58	0.65	− 0.40	0.63
AUTO-R	Purebred	0.21	0.24	0.36	0.29
AUTO-R	Crossbred	0.19	0.27	0.34	0.23

EP total number of eggs laid per layer between 25 and 83 weeks of age, LNVAR natural logarithm of the variance of the deviations between the observed phenotype and the average of the batch, SKEW skewness of the distribution of these deviations, AUTO-R lag-one autocorrelation of these deviations

ISSN: 1297-9686