Research progress and prospect of triploid breeding of forest trees

Kang, Xiangyang

doi:10.1360/ssv-2019-0126

Cited by 6 publications

(6 citation statements)

References 12 publications

(13 reference statements)

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“…The use of polyploids in other species is also studied and has consistent results, e.g., Kang (2020) in triploid clones of Populus spp. in China suggest that triploid breeding will play an important role in increasing yield of forest production, improving wood quality and stress resistance.…”

Section: Introductionmentioning

confidence: 74%

“…In our study triploid and tetraploid trees had wider trunks, taller individuals with longer stems and wider crowns compared to diploid trees. Kang (2020) in triploid clones of Populus spp. found fast growth compared to diploid trees.…”

Section: Tree Sizementioning

confidence: 99%

“…Regarding fiber dimensions, our results are similar to those of Zhai et al (2012) in Paulownia fortunei, Fantuzzi Neto (2012) in polyploid clones of Eucalyptus grandis x Eucalyptus urophylla, and Griffin et al (2014) in Acacia mangium, who found wood with longer, wider and thicker-walled fibers in polyploid (tetraploids) trees compared to diploid trees. Kang (2020) in triploid clones of Populus spp. found longer fiber compared to diploid trees.…”

Section: Anatomical Featuresmentioning

confidence: 99%

“…Through polyploidy, Kang (2010) makes the argument that it is possible to reach characteristics of interest in Populus spp., among them low lignin content, which is also desirable for Eucalyptus species used for pulp and papermaking. Kang (2020) in triploid clones of Populus spp. found lower lignin and higher holocellulose content compared to diploid trees.…”

Section: Chemical Assaysmentioning

confidence: 99%

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Differences in wood properties among Eucalyptus grandis and Eucalyptus grandis x Eucalyptus urophylla with different degrees of ploidy

Longui

Custódio

Amorim

et al. 2021

RSD

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We compared the anatomy, density, chemical contents, and bioenergy values of Eucalyptus grandis and hybrids of Eucalyptus grandis x Eucalyptus urophylla wood originating from diploids, triploids and tetraploids. We hypothesize that Eucalyptus grandis and hybrids of Eucalyptus grandis x Eucalyptus urophylla with different degrees of ploidy have variations as a result of different sets of chromosomes producing different phenotypic expressions and chemical constituents, such as variation in cell size and frequency, which would directly influence wood quality. Twenty-year-old trees were cut, eight for each ploidy: diploids and tetraploids are E. grandis; triploids are E. grandis x E. urophylla. We use standardized techniques. Our hypothesis was confirmed. Triploid and tetraploid trees presented wider trunks, taller trees with longer stems and wider crowns compared to diploid trees. Wood density showed significant radial variation only in diploids, while triploid and tetraploid trees were more homogeneous. In polyploid trees, the anatomical features did not clearly present a radial pattern. Triploid and tetraploid trees presented higher density wood than diploid trees. The chemical constituents varied from pith to bark in the three ploidies, but no differences between ploidies were found. For energy generation purposes, diploid and triploid trees are more desirable than tetraploid trees.

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Section: Introductionmentioning

confidence: 74%

Section: Tree Sizementioning

confidence: 99%

Section: Anatomical Featuresmentioning

confidence: 99%

Section: Chemical Assaysmentioning

confidence: 99%

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Differences in wood properties among Eucalyptus grandis and Eucalyptus grandis x Eucalyptus urophylla with different degrees of ploidy

Longui

Custódio

Amorim

et al. 2021

RSD

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“…Triploid breeding is an effective approach for the genetic improvement of tree species, which can achieve multitarget trait improvement on growth, wood properties, and stress resistance (Kang, 2020). In Acacia, allotriploid clones derived from crossing tetraploid Acacia mangium with diploid A. auriculiformis possessed a higher heartwood proportion and bark thickness than commercial diploid clones (Bon et al, 2020).…”

Section: Introductionmentioning

confidence: 99%

Disaggregation of Ploidy, Gender, and Genotype Effects on Wood and Fiber Traits in a Diploid and Triploid Hybrid Poplar Family

et al. 2022

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Triploid breeding based on unilateral sexual polyploidization is an effective approach for genetic improvement of Populus, which can integrate heterosis and ploidy vigor in an elite variety. However, the phenotypic divergence of unselected allotriploids with the same cross-combination remains poorly understood, and the contributions of ploidy, gender, and genotype effects on phenotypic variation are still unclear. In this study, wood and fiber traits, including basic density (BD), lignin content (LC), fiber length (FL), fiber width (FW), and fiber length/width (FL/W), were measured based on a 10-year-old clonal trial, including full-sib diploid and triploid hybrids of (Populus pseudo-simonii × P. nigra ‘Zheyin3#’) × P. × beijingensis, and contributions of ploidy, gender, and genotype effects on the variation of these traits, were disaggregated to enhance our understanding of triploid breeding. We found a significant phenotypic variation for all measured traits among genotypes. All the wood and fiber traits studied here underwent strong clonal responses with high repeatabilities (0.55–0.76). The Pearson’s correlation analyses based on the best linear unbiased predictors (BLUPs) revealed that BD was significantly positively correlated with FL (r = 0.65, p = 0.030), suggesting that BD could be improved together with FL during triploid breeding. The FL of the triploids was significantly larger than that of the diploids (p < 0.001), suggesting that ploidy strongly affected the variation of FL traits. The difference between females and males was not significant for any measured trait, implying that gender might not be a major factor for variation in these traits. Further analyses of variance components showed that genotype dominantly contributed to the variation of BD, LC, and FW traits (with 54, 62, and 53% contributions, respectively) and ploidy contributed strongly to variation in FL and FL/W (77 and 50%, respectively). The genetic coefficient of variation (CVG) of triploids for each trait was low, suggesting that it is necessary to produce many triploids for selection or to use different Populus species as parents. Our findings provide new insights into the genetic effects of ploidy, gender, and genotype on wood and fiber traits within a full-sib poplar family, enhancing the understanding of the triploid breeding program of Populus.

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In vitro induction of tetraploid and resulting trait variation in Populus alba × Populus glandulosa clone 84 K

Ren

Jing

Kang

2021

Plant Cell Tiss Organ Cult

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Research progress and prospect of triploid breeding of forest trees

Abstract: A fixed-parameter algorithm for the maximum agreement forest problem on multifurcating trees SCIENCE CHINA Information Sciences 59, 012102 (2016); Research progress and prospect of the waterless hydraulic fracturing technology

Cited by 6 publications

References 12 publications

Differences in wood properties among Eucalyptus grandis and Eucalyptus grandis x Eucalyptus urophylla with different degrees of ploidy

Differences in wood properties among Eucalyptus grandis and Eucalyptus grandis x Eucalyptus urophylla with different degrees of ploidy

Disaggregation of Ploidy, Gender, and Genotype Effects on Wood and Fiber Traits in a Diploid and Triploid Hybrid Poplar Family

In vitro induction of tetraploid and resulting trait variation in Populus alba × Populus glandulosa clone 84 K

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