TREND OF REALIZED GENETIC GAIN OBSERVED IN SECOND-GENERATION SEEDLING SEED ORCHARDS OF ACACIA MANGIUM IN SOUTH KALIMANTAN, INDONESIA
| Main Authors: | Nirsatmanto, Arif, Setyaji, Teguh, Surip, Surip |
|---|---|
| Format: | Article info "application/pdf" eJournal |
| Bahasa: | eng |
| Terbitan: |
Secretariat of Agency for Standardization of Environment and Forestry Instruments
, 2013
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| Subjects: | |
| Online Access: |
http://ejournal.forda-mof.org/ejournal-litbang/index.php/IJFR/article/view/21 http://ejournal.forda-mof.org/ejournal-litbang/index.php/IJFR/article/view/21/20 |
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<dc schemaLocation="http://www.openarchives.org/OAI/2.0/oai_dc/ http://www.openarchives.org/OAI/2.0/oai_dc.xsd"><title lang="en-US">TREND OF REALIZED GENETIC GAIN OBSERVED IN SECOND-GENERATION SEEDLING SEED ORCHARDS OF ACACIA MANGIUM IN SOUTH KALIMANTAN, INDONESIA</title><creator>Nirsatmanto, Arif</creator><creator>Setyaji, Teguh</creator><creator>Surip, Surip</creator><subject lang="en-US">Acacia mangium; Realized Genetic Gain; Seedling Seed Orchard; Second Generation</subject><description lang="en-US">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.</description><publisher lang="en-US">Secretariat of Agency for Standardization of Environment and Forestry Instruments</publisher><contributor lang="en-US"/><date>2013-06-14</date><type>Journal:Article</type><type>Other:info:eu-repo/semantics/publishedVersion</type><type>Other:</type><type>File:"application/pdf"</type><identifier>http://ejournal.forda-mof.org/ejournal-litbang/index.php/IJFR/article/view/21</identifier><identifier>10.20886/ijfr.2013.10.1.57-64</identifier><source lang="en-US">Indonesian Journal of Forestry Research; Vol 10, No 1 (2013): Journal of Forestry Research; 57-64</source><source>2406-8195</source><source>2355-7079</source><language>eng</language><relation>http://ejournal.forda-mof.org/ejournal-litbang/index.php/IJFR/article/view/21/20</relation><rights lang="en-US">Copyright (c) 2015 Indonesian Journal of Forestry Research</rights><recordID>--ejournal.forda-mof.org-ejournal-litbang-index.php-index-oai?verb=ListSets:article-21</recordID></dc>
|
| language |
eng |
| format |
Journal:Article Journal Other:info:eu-repo/semantics/publishedVersion Other Other: File:"application/pdf" File Journal:eJournal |
| author |
Nirsatmanto, Arif Setyaji, Teguh Surip, Surip |
| title |
TREND OF REALIZED GENETIC GAIN OBSERVED IN SECOND-GENERATION SEEDLING SEED ORCHARDS OF ACACIA MANGIUM IN SOUTH KALIMANTAN, INDONESIA |
| publisher |
Secretariat of Agency for Standardization of Environment and Forestry Instruments |
| publishDate |
2013 |
| 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 http://ejournal.forda-mof.org/ejournal-litbang/index.php/IJFR/article/view/21/20 |
| contents |
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. |
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