Genetics Selection Evolution

Table 2 Estimates of variances, heritabilities, and repeatabilities for egg weight traits at different ages

From: Genetic parameters, reciprocal cross differences, and age-related heterosis of egg-laying performance in chickens

Trait	Univariate model			Multivariate model
Trait	Phenotypic variance (\({\sigma }_{p}^{2}\))	Heritability (h²)	Repeatability (r)	Phenotypic variance (\({\sigma }_{p}^{2}\))	Heritability (h²)	Repeatability (r)
FEWt	19.87	0.29	0.47	19.94	0.28	0.47
EWt28	13.02	0.46	0.71	12.99	0.46	0.71
EWt32	13.43	0.51	0.70	13.35	0.49	0.69
EWt36	14.74	0.62	0.85	14.59	0.63	0.85
EWt40	15.97	0.62	0.85	15.97	0.62	0.85
EWt44	16.27	0.58	0.77	16.13	0.58	0.77
EWt48	18.41	0.75	0.85	17.64	0.73	0.84
EWt52	18.40	0.69	0.81	17.89	0.68	0.81
EWt56	19.49	0.64	0.83	19.08	0.61	0.83
EWt60	19.69	0.52	0.84	19.73	0.54	0.84
EWt64	20.67	0.68	0.85	20.38	0.71	0.85
EWt68	21.80	0.57	0.79	21.60	0.58	0.79
EWt72	21.91	0.45	0.70	21.58	0.41	0.69
EWt76	23.34	0.55	0.80	22.55	0.53	0.80
EWt86	28.17	0.56	0.74	27.72	0.49	0.74
EWt100	30.01	0.41	0.74	29.31	0.46	0.74

With the univariate model, standard errors ranged from 0.05 to 0.11 for heritabilities, and from 0.01 to 0.02 for repeatabilities. With the multivariate model, standard errors ranged from 0.05 to 0.11 for heritabilities, and from 0.01 to 0.02 for repeatabilities
FEWt average weight for the first three eggs, EWtX egg weight at X weeks of age

Back to article page

ISSN: 1297-9686

Contact us

Submission enquiries: gse@inrae.fr
General enquiries: info@biomedcentral.com