Genetic parameter estimates for growth, stem-form and branching traits of Casuarina junghuhniana clones grown in Thailand

Luechanimitchit, Piset; Luangviriyasaeng, V.; Laosakul, Suthat; Pinyopusarerk, K.; Bush, David R.

doi:10.1016/j.foreco.2017.08.030

Cited by 14 publications

(10 citation statements)

References 9 publications

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“…Our results corroborate the few studies conducted on tropical hardwood species showing that a significant part of the variability in tree growth can be explained by genetic factors (e.g., León et al, 2017;Luechanimitchit et al, 2017;Sawitri et al, 2020), a prerequisite for tree breeding. Kuehne et al (2013) found that the influence of the mother tree on growth is most noticeable during the juvenile stages.…”

Section: Influence Of Mother Tree On Growthsupporting

confidence: 90%

Influence of spacing and seed trees on the growth of Pericopsis elata saplings during the first twenty months of a planting trial

Ilunga-Mulala¹,

Hatakiwe²,

Beeckman³

et al. 2021

Biotechnol. Agron. Soc. Environ.

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Description of the subject. Pericopsis elata (Fabaceae) is a long-lived light-demanding tree from African rain forests that produces timber of high economic value. Natural populations suffer from overexploitation and a deficit of natural regeneration. Plantations could increase its production and limit the pressure on natural forests. However, we lack knowledge on the influence of spacing and seed tree origin on tree growth to optimize plantation protocols. Objectives. This study evaluated the impact of sapling density and seed tree origin on the growth in diameter and height of P. elata plants, 20 months after plantation. Method. Seeds were collected on 19 mother trees in a 400 ha natural stand near Kisangani (DRC). In October 2017, seedlings were transplanted in a Nelder design plantation with three replicates, to compare sapling growth at 10 contrasting plant densities under full sun. Diameter and height increments of 540 plants were analyzed according to local competition and maternal origin using generalized additive models. Results. Twenty months after planting, height growth peaked at an intermediate density of 47,000 stems·ha-1 (165.6 ± 39.2 cm·year-1), while diameter growth peaked at a lower density of 4,200 stems·ha-1 (24.6 ± 8.3 mm·year-1). The maternal origin of saplings affected their growth, the coefficients of variation among mother trees reaching 7.6% and 6.4% for diameter and height increments, respectively. The initial diameter affected positively diameter growth while the initial height did not influence height growth. Conclusions. The Nelder design proved useful to assess how plant growth depends both on spacing and genetic factors.

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Section: Influence Of Mother Tree On Growthsupporting

confidence: 90%

Influence of spacing and seed trees on the growth of Pericopsis elata saplings during the first twenty months of a planting trial

Ilunga-Mulala¹,

Hatakiwe²,

Beeckman³

et al. 2021

Biotechnol. Agron. Soc. Environ.

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“…C. junghuhniana is often planted for windbreaks in agroforestry and branching characteristics are important in this application as they influence the stability of trees in windstorms. Significant difference was observed between the clones for branch thickness and the majority of the clones had thick branches which were in accordance with the observations made by Leuchanimitchit et al, (2017) The higher performance of the clones in Sindigere can be attributed to the more favourable environmental factors at Sindigere. The higher temperature coupled with higher relative humidity has contributed to the better performance of the clones than in Kunchenahally.…”

Section: Clonal Performance At Individual Sitessupporting

confidence: 89%

Assessment of Growth Traits of Casuarina Clones at Diverse Sites in Karnataka

Dechamma¹,

Hegde²,

Maheswarappa³

et al. 2020

Int.J.Curr.Microbiol.App.Sci

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“…Variation parameters are mostly considered as the main factors to select trees for breeding purposes [52,53]. In this study, the difference in variation of different traits as given by PCV values varied from 10.73% to 35.45%, which were higher (considering the stand age) in comparison to the study of Lee et al [54].…”

Section: Discussionmentioning

confidence: 60%

Estimation of Genetic Parameters and Wood Yield Selection Index in a Clonal Trial of Korean Pine (Pinus koraiensis) in Northeastern China

2021

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In order to determine suitable traits for selecting high-wood-yield Korean pine materials, eleven morphological characteristics (tree height, basal diameter, diameter at breast height, diameter at 3 meter height, stem straightness degree, crown breadth, crown height, branch angle, branch number per node, bark thickness, and stem volume) were investigated in a 38-year-old Korean pine clonal trial at Naozhi orchard. A statistical approach combining variance and regression analysis was used to extract appropriate traits for selecting elite clones. Results of variance analysis showed significant difference in variance sources in most of the traits, except for the stem straightness degree, which had a p-value of 0.94. Moderate to high coefficients of variation and clonal repeatability ranged from 10.73% to 35.45% and from 0.06% to 0.78%, respectively. Strong significant correlations on the phenotypic and genotypic levels were observed between the straightness traits and tree volume, but crown breadth was weakly correlated to the volume. Four principal components retaining up to 80% of the total variation were extracted, and stem volume, basal diameter, diameter at breast height, diameter at 3 meter height, tree height, and crown height displayed high correlation to these components (r ranged from 0.76 to 0.98). Based on the Type III sum of squares, tree height, diameter at breast height, and branch number showed significant information to explain the clonal variability based on stem volume. Using the extracted characteristics as the selection index, six clones (PK105, PK59, PK104, PK36, PK28, and K101) displayed the highest Qi values, with a selection rate of 5% corresponding to the genetic gain of 42.96% in stem volume. This study provides beneficial information for the selection of multiple traits for genetically improved genotypes of Korean pine.

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Genetic parameter estimates for growth, stem-form and branching traits of Casuarina junghuhniana clones grown in Thailand

Cited by 14 publications

References 9 publications

Influence of spacing and seed trees on the growth of Pericopsis elata saplings during the first twenty months of a planting trial

Influence of spacing and seed trees on the growth of Pericopsis elata saplings during the first twenty months of a planting trial

Assessment of Growth Traits of Casuarina Clones at Diverse Sites in Karnataka

Estimation of Genetic Parameters and Wood Yield Selection Index in a Clonal Trial of Korean Pine (Pinus koraiensis) in Northeastern China

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