Evaluation on second generation progeny test of introduced Acacia crassicarpa species in Wonogiri, Central Java

Abstract

Kartikaningtyas D, Surip, Setyaji T, Sunarti S, Nirsatmanto A. 2018. Evaluation on second generation progeny test of introduced Acacia crassicarpa species in Wonogiri, Central Java. Pros Sem Nas Masy Biodiv Indon 4: 52-57. Tree improvement of introduced species Acacia crassicarpa was implemented by establishing the second generation of progeny test using wide genetic base, and it was expected to produce superior individuals with good genetic quality. The purpose of this study is to determine the growth and genetic diversity of introduced A. crassicarpa derived from Papua New Guinea (PNG) provenance on a second generation progeny test. The progeny test was established in Wonogiri which was laid out in randomized completely block design / RCBD, 66 families, 6 replications, 4 tree-plot with a spacing of 4 x 2 meters. Measurement was conducted at 36 months after planting including height, diameter at breast height, bole length, stem straightness and stem volume. The results showed that the families were significantly different for all measured traits. The proportion of the family variance to the total phenotypic variance ranged from 3.55% to 7.45%. Individual heritability was moderate(0.14 to 0.30), while the family heritability was low to moderate (0.28 to 0.46). The genotype correlations ranged from 0.31 to 0.91, and the value is greater than the phenotype correlations, except in diameter for diameter-stem straightness correlations. Genetic gain of the traits were 1.72% to 4.64%, with the highest gain was found for bole length.