The levels of additive variance in P. tecunumanii are of the same magnitude as found for other tropical and subtropical pine species. Mean individual tree heritability estimated from the 78-provenance/progeny tests at 5 and 8 years of age was 0.16 for volume, 0.13 for stem straightness, 0.09 for branch diameter and 0.06 for forking. Individual tree heritability for wood density in four tests of P. tecunumanii assessed in Colombia at 8 years of age ranged from 0.21 to 0.47. Family x site interactions for growth traits are important for P. tecunumanii.