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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Ministry of Environment and Forestry
2013-06-01
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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 |
work_keys_str_mv |
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