Abstract
Many tree planting programmes have long been initiated to increase forest cover to mitigate the effects of global climate change. Successful planting requires careful planning at the project level, including using suitable species with favourable traits. However, there is a paucity of improvement data for tropical tree species. An experimental common garden of Shorea leprosula was established to study traits related to growth performance which are key factors in planting success. Seedlings of S. leprosula were collected from nine geographical forest reserves. To study the effects of genetic variation, seedlings were planted in a common environment following a randomized complete block design. From performance data collected 2017‒2019, one population showed the highest coefficient for relative height growth, significantly higher than most of the other populations. Interestingly, this population from Beserah also exhibited the lowest coefficient for scale insect infestation. This study provides preliminary results on growth performance and susceptibility to scale insect infestation in S. leprosula and the first common garden experiment site conducted on dipterocarp species. It lays a foundation for future genome-wide studies.
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