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Susumu Shiraishi
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Agriculture, Biological Sciences & Forestry

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GEOGRAPHIC VARIATION OF CHLOROPLAST DNA HAPLOTYPES IN Acacia aulacocarpa A. Cunn. ex Benth Anthonius Y.P.B.C. Widyatmoko; Susumu Shiraishi
Indonesian Journal of Forestry Research Vol 10, No 1 (2013): Journal of Forestry Research
Publisher : Secretariat of Agency for Standardization of Environment and Forestry Instruments

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20886/ijfr.2013.10.1.43-56

Abstract

The geographic  variation  of chloroplast  DNA (cpDNA)  haplotypes  of Acacia aulacocar pa was investigated among 18 natural populations. These populations represent the geographical range of the species in New Guinea Island and Queensland. Single strand conformation polymorphism (SSCP) was used for the analysis. Two non-coding regions of cpDNA, the intron region of the trnL gene and the intergenic spacer region between the trnP and trnW genes, were analyzed, and four haplotypes (A, B, C, and D) were recognized. The haplotype distribution corresponded with the geographic distribution of the populations.  Based on four cpDNA haplotypes, the eighteen populations were divided into three groups: New Guinea Island, Northern  Queensland  and Southern Queensland.  Haplotype  C was observed only in the New Guinean populations, while the other three haplotypes (A, B, and D) were found in Queensland only. All of these three haplotypes were observed in Southern Queensland, whereas haplotype B was found only in the Northern Queensland populations. The cpDNA haplotype diversity of this species seemed to be highest in southern Queensland.
EVALUATION FOR THE EFFICIENCY OF EARLY SELECTION IN Acacia mangium SEEDLING SEED ORCHARDS BASED ON AGE TRENDS IN GENETIC PARAMETER Arif Nirsatmanto; Susumu Kurinobu; Susumu Shiraishi
Indonesian Journal of Forestry Research Vol 9, No 1 (2012): Journal of Forestry Research
Publisher : Secretariat of Agency for Standardization of Environment and Forestry Instruments

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20886/ijfr.2012.9.1.16-24

Abstract

The efficiency of early selection was evaluated based on age trend in genetic parameters using tree height data that was measured periodically repeatedly up to age 3 years of age in four seedling seed orchards of Acacia mangium at South Kalimantan, Indonesia. The four orchards were grouped into two populations based upon their provenances, namely: Papua New Guinea (PNG) and Far North Queensland-Australia (FNQ). A model for time trend of genetic parameters was developed by fitting regression equation to the estimates of variances and correlations using tree height data as an independent variable. In both populations, genetic variances and total phenotypic variances increased along with the mean height. Trend of individual heritability along the rotation ages were almost stable at around 0.19 for PNG, and gradually increased from 0.36 to 0.40 for FNQ. Trend of genetic correlations between selection age and rotation age increased rapidly starting at around 0.5 for PNG and 0.6 for FNQ, then exceeding 0.9 at age four years in both populations. Genetic gains due to indirect selection increased with age, in which the gains in FNQ were generally larger than those in PNG. Selection efficiency based on gain per year as a ratio of the gains from indirect selection to direct selection may conclude resulted the optimum age for selection at age two years old in both of PNG and FNQ population.
Co-Authors Anthonius Y.P.B.C. Widyatmoko Arif Nirsatmanto Susumu Kurinobu