Growth parameters and resistance to Sphaerulina musiva-induced canker are more important than wood density for increasing genetic gain from selection of Populus spp. hybrids for northern climates

Niemczyk, Marzena; Thomas, Barb R.

doi:10.1007/s13595-020-0931-y

Cited by 15 publications

(11 citation statements)

References 44 publications

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“…This indicates that we must continue YBs to age 9 or 10 (full rotation) to obtain a reliable estimate of clone performance, as found by Stanton (2001). Similarly, Niemczyk and Thomas (2020) found that in northern climates of North America, 8 years is a reliable age at which to select fast-growing and disease-resistant poplar clones for commercial deployment. We already adopt this procedure in YBs to derive accurate biomass yield estimates for our clones.…”

Section: Discussionmentioning

confidence: 81%

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Vectors of Efficiency in Hybrid Poplar Genotype Testing

et al. 2021

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The Natural Resources Research Institute Hybrid Poplar Program breeds and tests genetically improved clones for bio-mass production and environmental services. The testing process progresses from Nursery Progeny Tests (NPT) to Family Field Trials (FFT) to Clone Trials (CT) to Yield Blocks (YB), with limited replication of many clones in FFT and CT and a limited number of highly selected clones set out in monoclonal blocks (YB) to approximate the conditions of commercial plantations. We used correlation vectors, R2 (coefficient of determination) and rs (Spearman’s Coefficient) for growth (DBH2) and McFadden’s Pseudo R2 for canker severity score, to determine where testing times could be altered (age – age correlations) and whole testing steps eliminated. FFT can be shortened from 5 years to 4 years. In CT, rank correlations between age 5 (half-rotation) and age 9/10 (full rotation) were significant (R2 = 0.39 – 0.72), but age 5 selection missed 44 % of the top ten clones at age 9/10. Clone rank in CT at full, but not half, rotation was correlated with rank at full rotation in YB. Choosing clones at 9 years in CT adds 4 years but allows possible elimination of YB for clone selection. Both FFT and CT are necessary. Canker abundance and severity in CT at full rotation cannot be determined at earlier ages. An aggressive strategy saves 6 years of testing.

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Section: Discussionmentioning

confidence: 81%

“…This fact is one of the strongest justifications for continuing poplar breeding programs. Recent papers on Sphaerulina musiva in hybrid poplars provide background on canker resistance research (Dunnell et al, 2016;Niemczyk and Thomas, 2020;Tabima et al, 2020), including the importance of deploying resistant clones.…”

Section: Discussionmentioning

confidence: 99%

Vectors of Efficiency in Hybrid Poplar Genotype Testing

et al. 2021

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“…Wood density is a strong determinant of mechanical strength, which affects wood quality and potential uses (Lundqvist et al 2018) and is considered the main physical variable and key index for evaluating wood quality and pulp yield (Ortega Rodriguez and Tomazello-Filho 2019). An increase in wood density has an important effect on the efficiency of pulp production (Niemczyk and Thomas 2020). Site is also an important factor with a strong effect on wood density (Dias et al 2018).…”

Section: Discussionmentioning

confidence: 99%

Genetic variation and superior provenances selection for wood properties of Larix olgensis at four trials

Zhang

Chen

et al. 2022

J. For. Res.

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Larix olgensis, one of the most important timber species in northeastern China, is used for paper making and construction. In this study, 10 wood properties (wood density, fiber length, fiber width, fiber length- to width ratio, hemicellulose content, cellulose content, holocellulose content, lignin content, ash content, and carbon content) of 10 provenances of L. olgensis planted at sites of CuoHai (CH), JiaGeDaQi (JGDQ), LiangShui (LS), and Mao’erShan (MES) were analyzed. The results of ANOVA showed that almost traits differed significantly among locations and provenances, with a significant interaction effect. Each trait also differed significant among provenances within sites. The phenotypic and genetic coefficient of variation (PCV and GCV) and provenance heritability (H2) for wood properties ranged from 1.122 to 27.365%, from 0.564% to 21.113% and from 0.332 to 0.996, respectively. A correlation analysis showed that wood density was significantly negatively correlated with cellulose content and holocellulose content at sites CH, JGDQ, and LS, but were significantly positively correlated at site MES. Wood density was significantly negatively correlated with lignin content at CH and JGDQ, but not at LS and MES. Fiber width (FW) was negatively correlated with the ratio of fiber length (FL) to width across sites, and FW and FL/W were all positively correlated with FL. Lignin content was significantly positively correlated with hemicellulose content at site JGDQ and significantly negatively correlated with cellulose content and with holocellulose content at site MES. Interestingly, carbon content was positively correlated with cellulose content and holocellulose content at CH, but negatively correlated with these two traits at site MES. In a correlation analysis of wood properties with geographic, soil and climatic characteristics at the four sites, wood properties were mainly correlated with latitude and altitude of the site and affected by the average annual precipitation and temperature simultaneously. To select superior pulpwood provenances and high carbon storage provenances, we selected the two best provenances with excellent wood properties for each location based on a multi-trait comprehensive evaluation, which can be used as the preferred materials for the establishment of large-scale plantations in specific locations.

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“…Because large areas of single tree species have been grown over multiple years, the canker disease in these monoculture forests has become more and more serious over time. Poplar canker is also a major, global disease, causing varying degrees of forest death in the United States, Canada, Portugal and Afghanistan (Abelleira et al, 2019;Niemczyk & Thomas, 2020;Tabima et al, 2020). Botryosphaeria dothidea is one of the pathogenic fungi causing poplar canker.…”

Section: Introductionmentioning

confidence: 99%

Study on the molecular mechanism of Laccaria bicolor helping Populus trichocarpa to resist the infection of Botryosphaeria dothidea

Dong

Wang

Tang

2022

Journal of Applied Microbiology

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This study explored the specific molecular mechanism of Laccaria bicolor to help Populus trichocarpa resist infection by Botryosphaeria dothidea. Methods and Results: Transcriptome technology was used to sequence P. trichocarpa under disease stress, and a total of 6379 differentially expressed genes (DEGs) were identified. A total of 536 new DEGs were induced by L. bicolor during the infection of B. dothidea. L. bicolor helps to prevent and alleviate the infection of B. dothidea by regulating related genes in the cell wall pathway, signal transduction pathway, disease-resistant protein synthesis pathway and antioxidant enzyme synthesis pathway of P. trichocarpa. Conclusion:The inoculation of L. bicolor can regulate the expression of genes in the cell wall pathway and enhance the physical defense capabilities of plants. Under disease stress conditions, L. bicolor can regulate signal transduction pathways, diseaseresistant related pathways and reactive oxygen species (ROS) clearance pathways to help P. trichocarpa alleviate the disease. Significance and Impact of the Study:The research reveals the mechanism of L.bicolor inducing resistance to canker of P. trichocarpa from the molecular level and provides a theoretical basis for the practical application of mycorrhizal fungi to improve plant disease resistance.

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Growth parameters and resistance to Sphaerulina musiva-induced canker are more important than wood density for increasing genetic gain from selection of Populus spp. hybrids for northern climates

Cited by 15 publications

References 44 publications

Vectors of Efficiency in Hybrid Poplar Genotype Testing

Vectors of Efficiency in Hybrid Poplar Genotype Testing

Genetic variation and superior provenances selection for wood properties of Larix olgensis at four trials

Study on the molecular mechanism of Laccaria bicolor helping Populus trichocarpa to resist the infection of Botryosphaeria dothidea

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