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Table 3 Estimates of variance components and their ratios to phenotypic variance for the model of best fit for each trait

From: Genomic dissection of maternal, additive and non-additive genetic effects for growth and carcass traits in Nile tilapia

Trait

Model

\({\text{Additive}}\)

\({\text{Epistatic}}\)

\({\text{Maternal}}\)

\({\text{Residual}}\)

\({\text{Phenotypic}}\)

\(h^{2}\)

\(H^{2}\)

\(m^{2}\)

\({\mathbf{e}}_{{{\mathbf{aa}}}}^{2}\)

NOIA

 BD

AME

0.086 (0.024)

0.080 (0.049)

0.047 (0.032)

0.328 (0.044)

0.541 (0.039)

0.158 (0.042)

0.307 (0.090)

0.087 (0.055)

0.148 (0.091)

 B WH

AME

699 (268)

1183 (680)

635 (418)

4540 (618)

7059 (498)

0.099 (0.037)

0.266 (0.093)

0.090 (0.054)

0.167 (0.096)

 BL

AM

0.284 (0.107)

 

0.257 (0.162)

2.803 (0.136)

3.345 (0.209)

0.085 (0.031)

 

0.076 (0.045)

 

 FW

AM

118 (42)

 

99 (63)

1009 (50)

1227 (79)

0.096 (0.033)

 

0.080 (0.047)

 

 BT

A

1.695 (0.441)

  

8.015 (0.411)

9.710 (0.458)

0.174 (0.041)

   

 FY

A

1.758 (0.406)

  

7.461 (0.378)

9.220 (0.435)

0.190 (0.039)

   

HWE

 BD

AME

0.097 (0.027)

0.102 (0.063)

0.047 (0.032)

0.326 (0.045)

0.573 (0.042)

0.169 (0.046)

0.348 (0.1)

0.082 (0.053)

0.178 (0.106)

 BWH

AME

791 (303)

1504 (864)

635 (418)

4520 (626)

7450 (544)

0.106 (0.04)

0.308 (0.104)

0.085 (0.051)

0.201 (0.111)

 BL

AM

0.321 (0.120)

 

0.257 (0.162)

2.801 (0.136)

3.380 (0.213)

0.095 (0.034)

 

0.076 (0.044)

 

 FW

AM

133 (47)

 

99 (63)

1009 (50)

1241 (81)

0.107 (0.036)

 

0.079 (0.047)

 

 BT

A

1.915 (0.498)

  

8.004 (0.413)

9.92 (0.492)

0.193 (0.044)

   

 FY

A

1.987 (0.459)

  

7.450 (0.379)

9.437 (0.467)

0.210 (0.042)

   
  1. Standard errors are in parentheses
  2. The estimated ratios are: narrow sense heritability \(h^{2}\), broad heritability \(H^{2}\), maternal ratio \(m^{2}\), and epistatic ratio \({\mathbf{e}}_{{{\mathbf{aa}}}}^{2}\)
  3. A model represents the basic animal model, which is gradually expanded to an AME (model with additive (A), maternal (M) and first order additive-by-additive epistatic interactions (E) effects) by adding each effect as random effects
  4. NOIA and HWE are the two approaches used to calculate the different variance components (see “Methods” for details)
  5. The six traits are: BD body depth, BWH body weight at harvest, BL body length, FW fillet weight, BT body thickness, FY fillet yield