Genetic variation of wood chemical traits and association with underlying genes in Eucalyptus urophylla

Denis, Marie; Favreau, Bénédicte; Ueno, S.; Camus-Kulandaivelu, Létizia; Chaix, Gilles; Gion, Jean‐Marc; Nourrisier-Mountou, S.; Polidori, Joël; Bouvet, Jean‐Marc

doi:10.1007/s11295-013-0606-z

Cited by 35 publications

(31 citation statements)

References 72 publications

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“…Association genetics, proposed as a solution to the quandaries of QTL mapping, was expected to result in major advances in the dissection of multifactorial traits (Neale & Savolainen, ), warranting a number of association studies based on candidate genes (Neale & Kremer, ). In the eucalypts, a few associations between polymorphisms in candidate genes and wood traits have been reported (Thumma et al ., , ; Dillon et al ., ; Mandrou et al ., ; Denis et al ., ; Thavamanikumar et al ., ). Candidate gene studies, however, suffer from severe bias introduced by the a priori choice of genes and do not account for more than a few percent of trait variation, with estimates inflated because of the ‘winner's curse’ effect (Goddard et al ., ).…”

Section: Introductionmentioning

confidence: 99%

Regional heritability mapping and genome‐wide association identify loci for complex growth, wood and disease resistance traits in Eucalyptus

et al. 2016

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Although genome-wide association studies (GWAS) have provided valuable insights into the decoding of the relationships between sequence variation and complex phenotypes, they have explained little heritability. Regional heritability mapping (RHM) provides heritability estimates for genomic segments containing both common and rare allelic effects that individually contribute too little variance to be detected by GWAS. We carried out GWAS and RHM for seven growth, wood and disease resistance traits in a breeding population of 768 Eucalyptus hybrid trees using EuCHIP60K. Total genomic heritabilities accounted for large proportions (64-89%) of pedigree-based trait heritabilities, providing additional evidence that complex traits in eucalypts are controlled by many sequence variants across the frequency spectrum, each with small contributions to the phenotypic variance. RHM detected 26 quantitative trait loci (QTLs) encompassing 2191 single nucleotide polymorphisms (SNPs), whereas GWAS detected 13 single SNP-trait associations. RHM and GWAS QTLs individually explained 5-15% and 4-6% of the genomic heritability, respectively. RHM was superior to GWAS in capturing larger proportions of genomic heritability. Equated to previously mapped QTLs, our results highlighted genomic regions for further examination towards gene discovery. RHM-QTLs bearing a combination of common and rare variants could be useful enhancements to incorporate prior knowledge of the underlying genetic architecture in genomic prediction models.

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Section: Introductionmentioning

confidence: 99%

Regional heritability mapping and genome‐wide association identify loci for complex growth, wood and disease resistance traits in Eucalyptus

et al. 2016

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“…Isso por que a madeira adulta apresenta maior espessamento de parede das fibras, menor diâmetro dos vasos e menor proporção de espaços vazios (parênquima), aumentando a DB com o avanço da idade. Na literatura, poucos trabalhos reportaram DB para o E. urophylla em idades avançadas, variando de 0,423 g.cm -3 (14 anos) a 0,710 g.cm -3 (18 anos) (DENIS et al, 2013;HEIN et al, 2012;LOPES et al, 2011;SCANAVACA JUNIOR;GARCIA, 2004). Comumente, encontraram-se relatos para materiais entre quatro e dez anos, variando de 0,404 g.cm -3 a 0,530 g.cm -3 KIEN et al, 2009a;KIEN et al, 2009b;WU et al, 2013).…”

Section: Performance E Diferenças Entre Procedênciasunclassified

“…Os menores valores foram verificados para DB (< 6%) e os maiores para espessura de casca (> 10,42% -ECd), indicando que os caracteres de crescimento e morfológicos foram mais influenciadas pelo ambiente do que a DB. Esses resultados concordam com trabalhos anteriores em E. urophylla: Wei e Borralho (1997) para espessura de casca (32% a 38,5%) e DB (7,9%); Hein et al (2012) para circunferência do tronco (21,2%), altura (17,3%) e DB (7,2%); Denis et al (2013) para circunferência do tronco (29,3%) e DB (9,6%); e Wu et al (2013) para diâmetro a altura do peito com casca (34,11%), porcentagem de casca (28,31%) e DB (9,02%).…”

Section: Performance E Diferenças Entre Procedênciasunclassified

“…Na literatura, encontram-se com frequência relatos de herdabilidades para DB superior aos caracteres de crescimento (APIOLAZA et al, 2005;KIEN et al 2009a;STACKPOLE et al, 2010;HEIN et al, 2012;DENIS et al, 2013). Além disso, de acordo com Zobel e Talbert (1984), a DB é um caractere ideal para ser manipulado geneticamente, devido à grande variação entre árvores, alta herdabilidade e baixa interação genótipo × ambiente.…”

Section: Estimativas De Variação Genética E Herdabilidadeunclassified

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Parâmetros genéticos para caracteres de crescimento, espessura de casca e densidade básica da madeira em progênies de Eucalyptus urophylla S.T. Blake

Pupin¹,

Zaruma²,

Souza³

et al. 2017

Sci. For.

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ResumoA produção volumétrica tem sido prioridade nos programas de melhoramento florestal. No entanto, é necessário que a qualidade da madeira seja considerada, para que o fornecimento da matéria prima permita aumentar a eficiência e o rendimento industrial. Dessa forma, o objetivo deste trabalho foi estimar parâ-metros genéticos, correlações genéticas e ganhos com a seleção para caracteres de crescimento (diâme-tro), espessura de casca e densidade básica da madeira de Eucalyptus urophylla. Para tanto, utilizou-se discos de madeira retirados no DAP e metade da altura comercial, provenientes de árvores desbastadas em um teste de progênies de polinização aberta com 33 genótipos e duas procedências (Rio Claro-SP e Três Lagoas-MS), localizado em Selvíria-MS. Os parâmetros genéticos foram obtidos com base no procedimento REML/BLUP. O melhor desempenho para crescimento foi verificado para Rio Claro. Não foram detectadas diferenças genéticas para densidade da madeira entre as procedências. A procedência de Três Lagoas apresentou coeficiente de variação genética > 14% (diâmetro) e forte controle genético (herdabilidade > 0,6 e acurácia > 78%). Para qualidade da madeira, Rio Claro sobressaiu-se nas estimativas de herdabilidade (> 0,6 -DBM e ECD), alcançando acurácia superior a 79%. Foram encontrados resultados contrastantes para as correlações genéticas entre as duas procedências. Para a obtenção de materiais genéticos com maior densidade da madeira, a seleção para DBM é vantajosa. Palavras-chave: melhoramento florestal, qualidade da madeira, REML/BLUP. AbstractVolumetric production has been a priority in forest breeding programs. However, it is necessary to consider wood quality for the raw material supply that increases efficiency and yield. Thus, the aim of this study was to estimate genetic parameters, genitic correlations and selection gains for growth traits (diameter), bark thickness and basic density of wood in progênies of Eucalyptus urophylla. For this, we used wood discs removed at DHB and half the commercial height, from trees thinned in an open pollination progeny with 33 genotypes and two provenances (Rio Claro-SP and Três Lagoas-MS), located in Selvíria-MS. Estimates of genetic parameters were obtained using the REML/BLUP method. The best performance for growth was found in the Rio Claro provenance. Genetic differences in wood density between the provenances were not detected. The provenance of Três Lagoas showed a coefficient of genetic variation > 14% (diameter) and strong genetic control (heritability > 0.6 and accuracy > 78%). For wood quality, Rio Claro stood out in the estimates of heritability (> 0.6 -DBM and ECD), achieving a higher accuracy of 79%. Contrasting results were found for the genetic correlation between the two sources. For obtaining genetic materials with higher density wood, the selection for DBM is advantageous.

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“…Association genetics has been Table 6 Genotypic differentiation for each population pair (exact G-test) and P-value (Fisher's method). Denis et al 2013;Guerra et al 2013). The present study is based on only four microsatellites and low number of markers.…”

Section: Locus Eac1d10mentioning

confidence: 99%

Differences in wood properties of Picea abies L. Karst. in relation to site of provenance and population genetics

Sandak

Cantini

et al. 2014

Holzforschung

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Differences in wood properties of Picea abies L. Karst. in relation to site of provenance and population genetics Abstract: Chemical and physical characteristics of wood from six European populations of Picea abies were investigated taking into consideration their genetic differentiation determined by four microsatellites markers. The growth conditions of investigated spruce trees differed significantly. As a consequence, several adaptations were observed in samples from varying environments. The adaptation mechanisms include a variation to the annual rings morphology as well as the physical properties of the wood. It was proved that some properties, such as wood density or latewood ratio, are strictly correlated to the environmental variables. Results show that trees from geographically distinct populations present some diversity in the genotypes. It was also noticed that some trees did not share their genetic profile with other plants from the same location due to high intrapopulation variability. Samples from Finland possessed the lowest level of internal differentiation, while samples from northern Poland presented the lowest allele richness and were most divergent from the others. It was not possible to correlate any wood properties (chemical or physical) to genetic features of the population due to high intrapopulation diversity.

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Genetic variation of wood chemical traits and association with underlying genes in Eucalyptus urophylla

Cited by 35 publications

References 72 publications

Regional heritability mapping and genome‐wide association identify loci for complex growth, wood and disease resistance traits in Eucalyptus

Regional heritability mapping and genome‐wide association identify loci for complex growth, wood and disease resistance traits in Eucalyptus

Parâmetros genéticos para caracteres de crescimento, espessura de casca e densidade básica da madeira em progênies de Eucalyptus urophylla S.T. Blake

Differences in wood properties of Picea abies L. Karst. in relation to site of provenance and population genetics

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