TREND OF REALIZED GENETIC GAIN OBSERVED IN SECOND-GENERATION SEEDLING SEED ORCHARDS OF ACACIA MANGIUM IN SOUTH KALIMANTAN, INDONESIA

Comprehensive  tree improvement  program for Acacia mangium has been started since 1992 by establishing  a  series  of  first generation  Seedling  Seed  Orchards  (SSO)  in  Indonesia.  Selection procedures in the first-generation of SSO have completely finished, and subsequently it was continued f...

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Main Authors: Arif Nirsatmanto, Teguh Setyaji, Surip Surip
Format: Article
Language:English
Published: Ministry of Environment and Forestry 2013-06-01
Series:Indonesian Journal of Forestry Research
Subjects:
Online Access:http://ejournal.forda-mof.org/ejournal-litbang/index.php/IJFR/article/view/21
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spelling doaj-bf0592876a6e408ba8a1bef4de5652ac2020-11-25T00:44:58ZengMinistry of Environment and ForestryIndonesian Journal of Forestry Research2355-70792406-81952013-06-01101576410.20886/ijfr.2013.10.1.57-6421TREND OF REALIZED GENETIC GAIN OBSERVED IN SECOND-GENERATION SEEDLING SEED ORCHARDS OF ACACIA MANGIUM IN SOUTH KALIMANTAN, INDONESIAArif Nirsatmanto0Teguh SetyajiSurip SuripCenter for Forest Biotechnology and Tree Improvement, Yogyakarta, IndonesiaComprehensive  tree improvement  program for Acacia mangium has been started since 1992 by establishing  a  series  of  first generation  Seedling  Seed  Orchards  (SSO)  in  Indonesia.  Selection procedures in the first-generation of SSO have completely finished, and subsequently it was continued for second-generation improvement. This paper examines a trend of realized genetic gain as a response of selection practiced in the first-generation SSO. The observation was carried out in three sub-lines of the second-generation SSO (namely Sub-line B, C and D). Parameters recorded included tree height, diameter at breast height (dbh) and stem straightness that were recorded periodically up to 4 years growth. The realized genetic gain was calculated as a percentage of improved plus trees population in the first-generation of  SSO compared to those of  unimproved trees. The results showed that the improved population was consistently better that those of unimproved one until 4 years of age. There were variation in terms of realized genetic gain parameters recorded depending on the sub-lines and ages. The tree height varied from 1.1% to 5%, while dbh and stem straightness were in the ranges of 2.8% to 6.7% and from 1.8% to 8.4%, respectively. Across the three sub-lines, the tree height varied from 2.2% to 3.1%, while dbh and stem straightness were in the ranges of 4.3% to 5.2% and 4.3% to 6%, respectively.  In general, the trend of the realized genetic gains slightly decreased for dbh and tree height with the increasing of ages, while it slightly increased for stem straightness.http://ejournal.forda-mof.org/ejournal-litbang/index.php/IJFR/article/view/21Acacia mangiumRealized Genetic GainSeedling Seed OrchardSecond Generation
collection DOAJ
language English
format Article
sources DOAJ
author Arif Nirsatmanto
Teguh Setyaji
Surip Surip
spellingShingle Arif Nirsatmanto
Teguh Setyaji
Surip Surip
TREND OF REALIZED GENETIC GAIN OBSERVED IN SECOND-GENERATION SEEDLING SEED ORCHARDS OF ACACIA MANGIUM IN SOUTH KALIMANTAN, INDONESIA
Indonesian Journal of Forestry Research
Acacia mangium
Realized Genetic Gain
Seedling Seed Orchard
Second Generation
author_facet Arif Nirsatmanto
Teguh Setyaji
Surip Surip
author_sort Arif Nirsatmanto
title TREND OF REALIZED GENETIC GAIN OBSERVED IN SECOND-GENERATION SEEDLING SEED ORCHARDS OF ACACIA MANGIUM IN SOUTH KALIMANTAN, INDONESIA
title_short TREND OF REALIZED GENETIC GAIN OBSERVED IN SECOND-GENERATION SEEDLING SEED ORCHARDS OF ACACIA MANGIUM IN SOUTH KALIMANTAN, INDONESIA
title_full TREND OF REALIZED GENETIC GAIN OBSERVED IN SECOND-GENERATION SEEDLING SEED ORCHARDS OF ACACIA MANGIUM IN SOUTH KALIMANTAN, INDONESIA
title_fullStr TREND OF REALIZED GENETIC GAIN OBSERVED IN SECOND-GENERATION SEEDLING SEED ORCHARDS OF ACACIA MANGIUM IN SOUTH KALIMANTAN, INDONESIA
title_full_unstemmed TREND OF REALIZED GENETIC GAIN OBSERVED IN SECOND-GENERATION SEEDLING SEED ORCHARDS OF ACACIA MANGIUM IN SOUTH KALIMANTAN, INDONESIA
title_sort trend of realized genetic gain observed in second-generation seedling seed orchards of acacia mangium in south kalimantan, indonesia
publisher Ministry of Environment and Forestry
series Indonesian Journal of Forestry Research
issn 2355-7079
2406-8195
publishDate 2013-06-01
description Comprehensive  tree improvement  program for Acacia mangium has been started since 1992 by establishing  a  series  of  first generation  Seedling  Seed  Orchards  (SSO)  in  Indonesia.  Selection procedures in the first-generation of SSO have completely finished, and subsequently it was continued for second-generation improvement. This paper examines a trend of realized genetic gain as a response of selection practiced in the first-generation SSO. The observation was carried out in three sub-lines of the second-generation SSO (namely Sub-line B, C and D). Parameters recorded included tree height, diameter at breast height (dbh) and stem straightness that were recorded periodically up to 4 years growth. The realized genetic gain was calculated as a percentage of improved plus trees population in the first-generation of  SSO compared to those of  unimproved trees. The results showed that the improved population was consistently better that those of unimproved one until 4 years of age. There were variation in terms of realized genetic gain parameters recorded depending on the sub-lines and ages. The tree height varied from 1.1% to 5%, while dbh and stem straightness were in the ranges of 2.8% to 6.7% and from 1.8% to 8.4%, respectively. Across the three sub-lines, the tree height varied from 2.2% to 3.1%, while dbh and stem straightness were in the ranges of 4.3% to 5.2% and 4.3% to 6%, respectively.  In general, the trend of the realized genetic gains slightly decreased for dbh and tree height with the increasing of ages, while it slightly increased for stem straightness.
topic Acacia mangium
Realized Genetic Gain
Seedling Seed Orchard
Second Generation
url http://ejournal.forda-mof.org/ejournal-litbang/index.php/IJFR/article/view/21
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