SELECTION AND GENETIC GAIN IN THIRD-GENERATION SEEDLING SEED ORCHARD OF Acacia mangium
| Main Authors: | Handayani, Betty Rahma, Sunarti, Sri, Nirsatmanto, Arif |
|---|---|
| Format: | Article info application/pdf eJournal |
| Bahasa: | eng |
| Terbitan: |
Center for Forest Biotechnology and Tree Improvement (CFBTI)
, 2017
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| Subjects: | |
| Online Access: |
http://ejournal.forda-mof.org/ejournal-litbang/index.php/JPTH/article/view/3104 http://ejournal.forda-mof.org/ejournal-litbang/index.php/JPTH/article/view/3104/2224 |
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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">SELECTION AND GENETIC GAIN IN THIRD-GENERATION SEEDLING SEED ORCHARD OF Acacia mangium</title><creator>Handayani, Betty Rahma</creator><creator>Sunarti, Sri</creator><creator>Nirsatmanto, Arif</creator><subject lang="en-US">retrospective selection index; within-plot selection; family selection;</subject><description lang="en-US">One of the purposes of seedling seed orchard (SSO) establishment is to produce genetically improved seeds. The amount of genetic gain in the SSO is determined from a series of selection involving within and between family selection in which the gain is generally achieved from the accumulated increases of gain in successive advanced generation breeding cycles. In present study, the amount of genetic gain was predicted in third-generation SSO of Acacia mangium after first within-plot selection using a retrospective selection index’s method. The SSO was established in  Wonogiri, Central Java which was laid out in a randomized complete block design, 65 families, six replications, four trees-line plot and spacing of 2 m x 4 m. Actual within-plot selection was subjectively practiced in 40 months after planting. The observed traits for genetic gain prediction was height, diameter at breast height (dbh), and stem straightness  using data collected at 24 months after planting. For calculating genetic gain based on multiple trait selection index, coefficient weight for each trait was then derived from the selection differential. The results of study showed that the first within plot selection was practiced mostly for imposing dbh rather than height or stem straightness with the relative gain was 6% for dbh, and 3% for both height and stem straightness. Using the derived coefficient weight, the expected genetic gain by family selection was found to be slightly lower than those predicted by within-plot selection at 3% for dbh, and 2% for both height and stem straightness.</description><publisher lang="en-US">Center for Forest Biotechnology and Tree Improvement (CFBTI)</publisher><contributor lang="en-US"/><date>2017-06-30</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/JPTH/article/view/3104</identifier><identifier>10.20886/jpth.2017.11.1.57-66</identifier><source lang="en-US">Jurnal Pemuliaan Tanaman Hutan; Vol 11, No 1 (2017): Jurnal Pemuliaan Tanaman Hutan; 57-66</source><source>2527-8665</source><source>1693-7147</source><language>eng</language><relation>http://ejournal.forda-mof.org/ejournal-litbang/index.php/JPTH/article/view/3104/2224</relation><rights lang="en-US">Copyright (c) 2017 Betty Rahma Handayani, Sri Sunarti, Arif Nirsatmanto</rights><rights lang="en-US">http://creativecommons.org/licenses/by-nc/4.0</rights><recordID>--ejournal.forda-mof.org-ejournal-litbang-index.php-index-oai:article-3104</recordID></dc>
|
| language |
eng |
| format |
Journal:Article Journal Other:info:eu-repo/semantics/publishedVersion Other Other: File:application/pdf File Journal:eJournal |
| author |
Handayani, Betty Rahma Sunarti, Sri Nirsatmanto, Arif |
| title |
SELECTION AND GENETIC GAIN IN THIRD-GENERATION SEEDLING SEED ORCHARD OF Acacia mangium |
| publisher |
Center for Forest Biotechnology and Tree Improvement (CFBTI) |
| publishDate |
2017 |
| topic |
retrospective selection index within-plot selection family selection |
| url |
http://ejournal.forda-mof.org/ejournal-litbang/index.php/JPTH/article/view/3104 http://ejournal.forda-mof.org/ejournal-litbang/index.php/JPTH/article/view/3104/2224 |
| contents |
One of the purposes of seedling seed orchard (SSO) establishment is to produce genetically improved seeds. The amount of genetic gain in the SSO is determined from a series of selection involving within and between family selection in which the gain is generally achieved from the accumulated increases of gain in successive advanced generation breeding cycles. In present study, the amount of genetic gain was predicted in third-generation SSO of Acacia mangium after first within-plot selection using a retrospective selection index’s method. The SSO was established in Wonogiri, Central Java which was laid out in a randomized complete block design, 65 families, six replications, four trees-line plot and spacing of 2 m x 4 m. Actual within-plot selection was subjectively practiced in 40 months after planting. The observed traits for genetic gain prediction was height, diameter at breast height (dbh), and stem straightness using data collected at 24 months after planting. For calculating genetic gain based on multiple trait selection index, coefficient weight for each trait was then derived from the selection differential. The results of study showed that the first within plot selection was practiced mostly for imposing dbh rather than height or stem straightness with the relative gain was 6% for dbh, and 3% for both height and stem straightness. Using the derived coefficient weight, the expected genetic gain by family selection was found to be slightly lower than those predicted by within-plot selection at 3% for dbh, and 2% for both height and stem straightness. |
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Kementerian Lingkungan Hidup dan Kehutanan Republik Indonesia |
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Perpustakaan Kementerian Lingkungan Hidup dan Kehutanan RI |
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Indonesian Journal of Forestry Research |
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