Rina Laksmi Hendrati
Balai Besar Penelitian Bioteknologi dan Pemuliaan Tanaman Hutan

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SAMBUNGAN ANTAR PROVENANS DAN FAMILI Eucalyptus occidentalis UNTUK MENUNJANG PEMULIAANNYA DAN PENGARUH KARAKTER ENTRIS PADA PERTUMBUHAN TUNAS BARU Rina Laksmi Hendrati
Jurnal Pemuliaan Tanaman Hutan Vol 6, No 2 (2012): Jurnal Pemuliaan Tanaman Hutan
Publisher : Center for Forest Biotechnology and Tree Improvement (CFBTI)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20886/jpth.2012.6.2.101-114

Abstract

In tree improvement program, vegetative propagules, including grafting, from improved materials will develop into individuals with the same genetic structures from its improved clonal sources. Vegetative propagules are also advantagous due to their earlier flowering and fruiting if compared to seedlings. Grafting success will be etermined by compatibilities between 2 different tissues from different genetic sources. In this study, grafting success of E. occidentalis between rootstocks and entries of different provenans and families were examined using scions collected from mature (6.5 year) trees to hasten deployment of improved genotypes. Reciprocal grafting between provenances with different provenance  rootstocks and scions were conducted with successvaried from none to complete survival. Abilities of two best provenans under waterlogging, Dumbleyung and Young River, to perform highest survival in grafting provide advantages for deployment of their genetic materials. Genotype differences between scions were more obvious to influence survival than between rootstocks. Small number of grafted plants initiated flowers 4 months after grafting. Scion diameter, length and initial leaves affect the growth of new shoots. The best E. occidentalis grafting success were determined by scion length of 2.5 - 4 cm, diameter of 6 - 7 mm with all leaves removed.
PEMBUNGAAN Eucalyptus occidentalis PADA PERPANJANGAN MASA PENYINARAN DAN PACLOBUTRAZOL Rina Laksmi Hendrati
Jurnal Pemuliaan Tanaman Hutan Vol 2, No 3 (2008): Jurnal Pemuliaan Tanaman Hutan
Publisher : Center for Forest Biotechnology and Tree Improvement (CFBTI)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20886/jpth.2008.2.3.277-286

Abstract

Flowering stimulation were investigated to accelerate deployment of E. occidentalis. It was found that extended daylength (16-h) in juvenile plants stimulate flowers of very limited individuals/family with less number of buds than normal inflorescences. Extended daylength (16-h) promote flowering of most families from 2 year-old E. occidentalis plants. In combination with paclobutrazol (1 mg. a.i/mm), number of buds were doubled. Under 16-h daylength, juvenil plants were taller up to 25 weeks than under natural light but shorter for family 96-LM that produced more flowers than others. There were no height differences between 16-h daylength and in combination with paclobutrazol in 2-year old plants.