Genetic variation of plant growth on progeny test of nyatoh (Palaquium obtusifolium) age 1.5 year in Batuangus forest research station, North Sulawesi

Abstract

Halawane J, Kinho J, Irawan A. 2015. Genetic variation of plant growth on progeny test of nyatoh (Palaquium obtusifolium) age 1.5 year in Batuangus forest research station, North Sulawesi. Pros Sem Nas Masy Biodiv Indon 1: 819-823. Nyatoh (Palaquium obtusifolium Burck) is one of important commercial timber in the local of North Sulawesi that has been wide known and used for household appliances, raw material of house construction and industry. Nowadays, most of nyatoh wood were supplied from natural stands, thus the potency of nyatoh was continued decreasing. One effort to anticipate this condition is cultivated action. Progeny test of nyatoh was demonstration plots established for the provision of improved seed to support the development of nyatoh in North Sulawesi. This research was conducted using Randomized Complete Block Design with 55 families, 5 blocks and 5 plants per plot. Plantation spacing was 4 m x 5 m. The measured parameters were height and diameter growth. The results showed that there were significant differences between families (descended from the same of mother tree) for height and diameter growth which illustrated that there was a high genetic variability of plant growth. Estimated of individual heritability for height and diameter growth were 0.33 and 0.05. Estimated of family heritability for height and diameter growth were 0.53 and 0.12. Genetic correlation between height and diameter growth was 0.77. The obtain of genetic trait of diameter growth based on selection intensity of 10%, 25% and 30% were 0.09 cm (10.78%), 0.061 cm (7.72%) and 0.055 cm (7.05%). The obtain of the genetic trait of high growth based on the same selection intensity were 14.94 cm (28.16%), 10.70 cm (20.16%) and 9.76 cm (18.40%).