Pinus kesiya International Provenance Trials: Overview

bullet1 Indonesia

bullet2 Conclusion and recommendations

Based on the performance in the two trials, the two sources of P. tecunumanii are the most promising. Further testing and investigation of the genetic variation within this species is recommended. The Research  & Development Division has trials under way with additional sources of P. tecunumanii and these trials will provide valuable information on the most appropriate sources of the species.

P. kesiya shows little promise as a plantation species on the tested sites. The growth is much slower than P. tecunumanii and P. oocarpa, and it also compares less favorable in regard to stemform.  P. kesiya  may have a larger potential on poorer and harsher sites more influenced by fires (Clegg, pers. comm.). If results of the present trials also are applicable under such conditions, the analysis indicates the Lang Hanh source (natural population from the central plateau of Vietnam) and Bodana A8 (offspring from seed orchard in Madagascar, material probably originally from Vietnam) as the most promising sources.  The Lang Hanh source may show an even larger potential in subsequent generations as inbreeding depression from the natural population breaks down. Other sources from the Central plateau of Vietnam could also be of interest.