Tree Improvement for Eucalyptus pellita: Investigation on The Results ofFirst Generations of Breeding with Seedling Seed Orcha rd in Indonesia

ABSTRACT

The investigations involved analyzing data collected in first (F-1) and second (F-2) generation seedling seed orchards (SSO) of E. pellita established at four locations in the three provinces of Indonesia (South Kalimantan, South Sumatra and Riau, Sumatra) using the same tested materials. The F-1 orchards were established in 1994-1996, while the F-2 orchards were established in 2003 in the same areas of the first generation orchards. Such assessments are essential for optimizing the tree improvement strategy to be applied to further generations. The studies focused on the following five issues: 1) priority trait in within family-plot selection, 2) the optimum age for plus trees selection, 3) genotype-environment interactions (GEI), 4) the design of the SSO, and 5) realized genetic gains. The results show that 1) the mean realized gains in the F-2
SSO were around 15% and 19% for height and diameter, respectively; 2) the overall process of
selection in the F-1 SSO has favored the improvement of growth rather than stem form; 3) one generation of breeding cycle of E. pellita should be achieved in a five-year period with eight-year rotations; 4) the design of SSO should also use ca. 40 to 50 families with six to eight trees per plot and 5) the GEI in SSO of E. pellita will have significant adverse effect if the seed from F-1 orchard are supplied to other island. The results also indicate that a breeding strategy plays a key role in ensuring the success of tree improvement programs.


Keywords: Eucalyptus pellita, genetic gains, genotype-environment, seedling seed orchard, tree improvement

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Informasi Detil

Judul Seri

Proceeding NAFOR (Internasional Conference of Indonesia Forestry Researchers) 2011

No. Panggil

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Penerbit

: ., 2012

Deskripsi Fisik

221-223

Bahasa

English

ISBN/ISSN

978-979-8452-45-1

Klasifikasi

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Tipe Isi

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Tipe Media

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Tipe Pembawa

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Edisi

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Subyek

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Info Detil Spesifik

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Pernyataan Tanggungjawab

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