Table 4. Estimation of variance components and heritabilities for three traits including shell height (SH), shell length (SL) and shell width (SW).
| Across-family | Fam1 | Fam2 | Fam3 | Fam4 | Fam5 | |
|---|---|---|---|---|---|---|
| SH | ||||||
| σa2 | 14.58 (2.56a) | 9.21 (2.49) | 6.38 (2.13) | 8.56 (1.10) | 12.27 (4.21) | 17.8 (2.75) |
| σe2 | 15.84 (1.18) | 14.88 (1.05) | 16.31 (1.15) | 7.01 (0.55) | 19.09 (1.51) | 14.2 (0.96) |
| h2 | 0.48 (0.05) | 0.38 (0.07) | 0.28 (0.08) | 0.41 (0.05) | 0.39 (0.09) | 0.54 (0.06) |
| SL | ||||||
| σa2 | 16.30 (2.68) | 9.93 (3.07) | 7.24 (3.11) | 1.79 (0.87) | 7.74 (1.73) | 5.92 (2.51) |
| σe2 | 17.48 (1.16) | 16.42 (1.32) | 20.47 (1.39) | 14.23 (0.98) | 25.81 (2.14) | 15.29 (1.34) |
| h2 | 0.48 (0.05) | 0.38 (0.08) | 0.26 (0.06) | 0.11 (0.05) | 0.23 (0.05) | 0.26 (0.09) |
| SW | ||||||
| σa2 | 2.66 (0.29) | 0.52 (0.37) | 2.15 (0.35) | 0.91 (0.04) | 2.53 (0.14) | 1.91 (0.16) |
| σe2 | 4.68 (0.15) | 3.07 (0.15) | 2.37 (0.15) | 1.24 (0.04) | 1.32 (0.06) | 2.43 (0.08) |
| h2 | 0.36 (0.06) | 0.15 (0.08) | 0.48 (0.05) | 0.67 (0.03) | 0.65 (0.04) | 0.71 (0.04) |
The genetic variances (σa2), error variance (σe2), and narrow-sense heritabilities (h2) were calculated for the entire population and individual families.
aStandard error.