Research Article
Estimation of Genetic and Phenotypic Parameters for Growth Traits in a Clonal Seed Orchard of Pinus kesiya in Malawi
Table 4
Variance components and heritability (standard errors) within families for height, dbh and volume traits at different ages.
| | Age (years) | Trait | | | | | (s.e) | (%) |
| | 18 | Height (h) | 156 | 12 | 113 | 281 | 0.51 (0.01) | 17.8 | | dbh | 184 | 48 | 385 | 617 | 0.22 (0.01) | 18.5 | | Volume | 21 | 4 | 15 | 40 | 0.43 (0.01) | 22.7 |
| | 23 | Height (h) | 158 | 10 | 102 | 278 | 0.53 (0.03) | 24.6 | | dbh | 196 | 36 | 376 | 614 | 0.26 (0.03) | 26.7 | | Volume | 22 | 4 | 14 | 39 | 0.46 (0.04) | 28.9 |
| | 30 | Height (h) | 159 | 10 | 99 | 276 | 0.54 (0.05) | 24.9 | | dbh | 210 | 32 | 371 | 610 | 0.29 (0.04) | 28.3 | | Volume | 22 | 4 | 13 | 38 | 0.47 (0.04) | 29.6 |
| | 35 | Height (h) | 140 | 17 | 108 | 298 | 0.41 (0.04) | 20.7 | | dbh | 180 | 53 | 380 | 658 | 0.19 (0.03) | 21.4 | | Volume | 20 | 6 | 15 | 41 | 0.33 (0.03) | 23.2 |
| | 40 | Height (h) | 117 | 23 | 113 | 301 | 0.31 (0.03) | 11.2 | | dbh | 175 | 79 | 381 | 681 | 0.14 (0.05) | 11.6 | | Volume | 16 | 7 | 16 | 45 | 0.20 (0.03) | 12.5 |
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: additive genetic variance, : genetic variance among families, : genetic variance within families, : residual variance, : heritability, : genetic gain.
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