| 要旨本文 |
Early selection is one of the challenges in long-term tree improvement. To decide the optimal timing of early and accurate selection, changes in genetic effects on tree growth by age are essential. The objective of this study is to investigate genetic parameter changes and age-age correlations from Pinus koraiensis progeny testing. Height, diameter and volume growth by individual tree in two sites were assessed over forty years. LiDAR survey and the animal model complemented by spatial autoregression effect were used in genetic effect estimation. The genetic parameter changes by traits and phenotype, genetic and breeding value rank correlation between ages were revealed from the Pinus koraiensis progeny testing. The genetic effect changes by age is expected to be used for the practical information in early selection. |
