Genetic Improvement of Eucalyptus Grandis for Biomass Production in Florida

Reddy, K. Narasimha; Rockwood, D. L.; Comer, C. W.; Meskimen, George

doi:10.1007/978-1-4757-0590-4_9

Cited by 6 publications

(7 citation statements)

References 1 publication

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“…Substantial genetic gains in volume productivity were obtained through four generations of selection in Florida (Reddy et al 1986). Large additional gains were also predicted by cloning the best trees (Reddy 1985).…”

Section: Introductionmentioning

confidence: 99%

Micropropagation of field tested superior Eucalyptus grandis hybrids

1990

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Application. Micropropagationof Eucalyptus may be an important tool for tree improvement and reforestation programs. Plantlets may be used for establishment of clonal seed orchards, testing of clonal candidates, and operational planting. Also, large numbers of clonal plantlets may be micropropagated for physiological and silvicultural studies when genetic uniformity is desired.Abstract. Three superior clones of Eucalyptus grandis hybrids were micropropagated through several steps. Five-year-old trees were girdled to induce juvenile sprouts. Cultures were attempted from mature branches and sprouts. Branches from mature trees were 100% contaminated while sprouts were only 40% contaminated. Pre-initiation hormone free medium and dark environment were used to screen for contaminants and to reduce production of phenolic compounds. Initiation of auxillary buds was achieved with modified MS plus 0.05 mg/l NAA and 0.5 mg/l BAP. High multiplication rates were obtained on auxin-free medium with 0.6 mg/l BAP. Elongation of shoots was best on media with high auxin (2.5 mg/l of IBA) and cytokinin (l-l.5 mg/l of zeatin). Continual subculture on the multiplication medium improved rooting significantly. Up to 98% rooting was achieved on l/4 MS with 2 mg/l IBA. Rooted propagules were successfully transferred to a mist greenhouse with 82% survival, and then to greenhouse conditions.

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Section: Introductionmentioning

confidence: 99%

Micropropagation of field tested superior Eucalyptus grandis hybrids

1990

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“…For instance, A. tumida was found to be highly variable with the other variants or provenances, whereas the Kulparn variety was found to have a low coppicing ability [50,51]. In contrast, four progenies at two different sites of another important Australian tree species, Eucalyptus grandis, in southern Florida showed no significant differences in coppicing ability [52,53]. The coppicing ability or effectiveness to produce the highest number of shoots per stump varies not only among species and tree age but also depends on plant size when being decapitated, stump height and percentage of the stand removed, cutting season, site condition/silviculture practice, and harvest method [54][55][56][57][58][59][60][61].…”

Section: Discussionmentioning

confidence: 99%

Coppicing Abilities of Decapitated Elite Tree Trunks of Selected Acacia Species Genotypes in Mixed-Species Plantation

Muniandi,

Muhammad,

Md Ariff

et al. 2023

Forests

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Maturation-related loss in the shooting and rooting ability of a species through macro or micropropagation techniques has been a limiting factor in any forest tree improvement program. The rejuvenation capacity of mature elite trees of Acacia mangium, Acacia crassicarpa, Acacia auriculiformis, and Acacia aulococarpa was investigated by evaluating the sprouting ability of decapitated trunks. Thus, a total of 120 trees were selected based on their superior phenotypic characteristics from four provenance and five progenies of each species, and trunks of the elite trees were decapitated into two different height groups to induce coppicing from the collar and base of the trunk. Coppicing ability varies with species, provenance, progeny, and cutting height. A. auriculiformis was the easiest to produce shoots by having the highest shooting percentage (84%) and the number of shoots per trunk (13.5), followed by A. mangium (75%) and A. aulococarpa (40%). The total shoot number increased significantly with the increase in the height of the stumps. Data indicated that there is a possibility to rejuvenate matured cutting through coppicing in the natural environment. This study will help in the standardization of the stumping procedure for the rejuvenation of elite Acacia genotypes while simultaneously assisting in preserving germplasm through clonal propagation.

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“…SRWC systems maximize productivity for the above uses [11,[22][23][24][25][26][27][28][29][30][31]. Due to propagation ease, rapid growth, tolerance to high stand density, response to intensive culture, and coppicing, E. amplifolia can produce up to 67 green mt ha −1 yr −1 in multiple SRWC rotations as short as three years.…”

Section: Potential Usesmentioning

confidence: 99%

Eucalyptus Amplifolia and Corymbia Torelliana in the Southeastern USA: Genetic Improvement and Potential Uses

Rockwood

Huber²,

Crawford³

et al. 2022

Forests

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Eucalyptus amplifolia and Corymbia torelliana genetic improvement has been conducted in the lower southeastern USA by UF and collaborators since 1980. The collective accomplishments in genetic resources and potential commercial uses are summarized. For example, fast-growing, freeze-resilient E. amplifolia seeds are provided by 1st and 2nd generation seedling seed orchards (SSO) and a 2nd generation clonal seed orchard (CSO), while C. torelliana seed are available from 1st and 2nd generation SSOs. Breeding values (BV) have been developed for guiding the deployment of improved genotypes. Collaborative genetic improvement of these species is ongoing, including testing E. amplifolia in 11 countries and development of hybrid clones. Short Rotation Woody Crop (SRWC) systems may increase productivity and extend uses beyond conventional mulchwood to products such as medium density fiberboard (MDF), biochar, and energywood, while other possible applications include honey production, windbreaks, dendroremediation, and carbon sequestration. C. torelliana may be paired with E. grandis in two-row windbreaks to maximum windbreak effectiveness and may sequester as much carbon as E. grandis.

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Genetic Improvement of Eucalyptus Grandis for Biomass Production in Florida

Cited by 6 publications

References 1 publication

Micropropagation of field tested superior Eucalyptus grandis hybrids

Micropropagation of field tested superior Eucalyptus grandis hybrids

Coppicing Abilities of Decapitated Elite Tree Trunks of Selected Acacia Species Genotypes in Mixed-Species Plantation

Eucalyptus Amplifolia and Corymbia Torelliana in the Southeastern USA: Genetic Improvement and Potential Uses

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