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Table 2 Genetic parameters for level of harvest weight, length, depth, and width

From: Genetic parameters for uniformity of harvest weight and body size traits in the GIFT strain of Nile tilapia

Parameter Harvest weight Length Depth Width
a \( \upsigma _{{{\text{A}}_{ } }}^{2} \) 573.46 (115.80) 0.732 (0.136) 0.202 (0.037) 0.034 (0.007)
\( \upsigma _{{{\text{e}}_{ } }}^{2} \) 1426.3 (27.99) 1.443 (0.028) 0.365 (0.007) 0.067 (0.001)
\( \upsigma _{{{\text{g}}_{ } }}^{2} \) 300.26 (42.81) 0.354 (0.047) 0.104 (0.012) 0.037 (0.004)
\( \upsigma _{{{\text{k}}_{ } }}^{2} \) 240.29 (35.45) 0.235 (0.035) 0.047 (0.008) 0.013 (0.002)
\( \upsigma _{{{\text{m}}_{ } }}^{2} \) 43.64 (20.83) 0.013 (0.006)
\( \upsigma _{{{\text{P}}_{ } }}^{2} \) 2297.2 (70.78) 2.418 (0.081) 0.631 (0.022) 0.136 (0.005)
\( {\text{h}}^{2} \) 0.25 (0.04) 0.30 (0.05) 0.32 (0.05) 0.25 (0.05)
b \( {\text{g}}^{2} \) 0.13 (0.02) 0.15 (0.02) 0.16 (0.02) 0.27 (0.02)
c \( {\text{k}}^{2} \) 0.10 (0.02) 0.10 (0.01) 0.08 (0.01) 0.10 (0.01)
d \( {\text{m}}^{2} \) 0.02 (0.01) 0.02 (0.01)
e \( {\text{GCV}} \) 0.14 0.05 0.06 0.06
  1. Standard errors are indicated between brackets
  2. aAdditive genetic variance was calculated as four times the sire-dam variance
  3. bGroup effect, calculated as \({\text{g}}^{2} = \upsigma _{\text{g}}^{2} /\upsigma _{\text{P}}^{2}\)
  4. cKin effect, calculated as \({\text{k}}^{2} = \upsigma _{\text{k}}^{2} /\upsigma _{\text{P}}^{2}\)
  5. dSocial maternal effect, calculated as \({\text{m}}^{2} = \upsigma_{\text{m}}^{2} /\upsigma _{\text{P}}^{2}\)
  6. eGenetic coefficient of variation