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Table 4 Estimates of variances and heritabilities for egg production traits

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

Trait

Univariate model

Multivariate model

Phenotypic variance (\({\sigma }_{p}^{2}\))

Heritability (h2)

Phenotypic variance (\({\sigma }_{p}^{2}\))

Heritability (h2)

AFE

81.18

0.55

82.78

0.62

OP

0.78

0.38

0.82

0.47

EN43

173.21

0.15

171.54

0.16

NC43

45.54

0.49

44.88

0.46

ACL43

25.88

0.05

23.76

0.29

APL43

0.19

0.01

0.19

0.04

EN72

1184.40

0.14

1152.90

0.10

NC72

237.93

0.40

240.91

0.41

ACL72

7.40

0.08

6.92

0.28

APL72

2.38

0.01

2.39

0.01

EN100

4309.40

0.15

4188.30

0.12

NC100

667.33

0.27

675.45

0.35

ACL100

2.62

0.11

2.49

0.30

APL100

5.21

0.13

5.12

0.18

  1. Standard errors for heritabilities ranged from 0.02 to 0.09 for the univariate model, and from 0.02 to 0.14 for the multivariate model
  2. AFE age at first egg, OP oviposition period, ENX cumulative egg number till X weeks of age, NCX number of clutches till X weeks of age, ACLX average clutch length till X weeks of age, APLX average pause length till X weeks of age
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Genetics Selection Evolution

ISSN: 1297-9686