KERAGAMAN SUDUT PERCABANGAN DAN PANJANG INTERNODUS TANAMAN UJI KETURUNAN PULAI GADING (Alstonia scholaris (L.). R.Br.)

Alstonia scholaris is a local species, widely used for making hadicraft and pencil slate. The purpose of this paper is to determine the effect of provenance and family on the diversity of tree branching angle and internodus length of A. scholaris plants. The experimental design used was a Completely Randomized Block Design with provenance and family treatments. The number of provenance involved was 5 provenances (Lombok, Jayapura, Solok, Timor and Bali) and the number of family involved was 48 families. Each family planted 4 seeds per plot with a spacing of 4 x 2 m and was repeated 3 times. The results of the analysis of variance showed that the provenance and family had a significant effect on the tree branching angle and length of the internodus. The average of tree branching angle between families ranges from 37.50 - 61.25o  and the length of the internodus ranges from 1.15 - 2.20 cm.  Provenance with the best tree branching angle are occupied by the Timor provenance and the best length of the internodus is occupied by the Lombok provenance. The best tree branching angle is occupied by 20 families with an angle range of 50.91o - 61.250  and the best length of the internodus is occupied by 22 families with a range of 1.82 - 2.20 m.