Eucalyptus spp. and hybrids dominate the global plantation forestry industry, and vegetative propagation through cuttings is the preferred method for their commercial use. However, the cuttings of some species and hybrids show recalcitrance to rooting. The first aim of this study was to improve percentage rooting of three clones of E. grandis x E. nitens (Clones 1, 2 and 3) identified by a commercial nursery as having variable rooting abilities. The second was to relate their rooting responses as cuttings to their rooting responses in vitro. Minicuttings (3.5 – 4 cm in length) (hereafter referred to as cuttings) were subjected to commercial nursery propagation practices. Initial results revealed that in the absence of exogenous plant growth regulators (PGRs), soft (juvenile, thin diameter) cuttings survived (87 – 95%) and rooted (29 – 32%) significantly better than hard (mature, thick diameter) ones (62 – 71% survival and 2 – 8% rooting). This validated the use of soft cuttings by the nursery and all subsequent studies were conducted with soft cuttings. The other nursery practice of applying the commercial rooting powder Seradix 2 (3 g kgˉ¹ indole-3-butyric acid [IBA]) adversely affected the survival and subsequent rooting of cuttings of Clones 1 and 2. Ensuing studies investigated: 1) the effect of mode of IBA application (powder vs. liquid); 2) concentrations of Seradix (0, 0.5, 1, 2 and 3 g kgˉ¹ IBA), applied at initial placement of cuttings and two weeks later; and 3) the influence of season on the survival and subsequent rooting of cuttings. Results showed that regardless of the mode of application, IBA significantly reduced percentage survival and rooting in cuttings of Clones 1 and 2. The delayed application of Seradix, two weeks after cuttings were initially set, resulted in a higher percentage survival and rooting than when cuttings were supplied with Seradix at initial placement. Nevertheless, the best survival for Clones 1, 2 and 3 (95%, 99% and 71%, respectively) and rooting (83%, 64% and 47%, respectively) occurred in the absence of Seradix. In addition, the survival and rooting of cuttings were seasonally variable, with particularly low rooting during winter (e.g. for Clone 1, 32%) when compared with summer (e.g. for Clone 1, 83%). Shoots from all the clones were multiplied in vitro, followed by elongation on either of two media (E1= kinetin, α-naphthalene acetic acid [NAA] and IBA; E2 = kinetin and indole-3-acetic acid [IAA]), and then rooting on 0, 0.1 or 1.0 mg 1ˉ¹ IBA. The latter were selected to typify the range of Seradix concentrations used for the cuttings (i.e. no IBA, low and high IBA concentrations). For all three clones, shoots elongated on E1 or E2 displayed high survival (> 80%) but failed to root without IBA in the rooting medium. For Clones 1, 2 and 3 the best in vitro survival (80%, 100% and 100%, respectively) and rooting (40%, 75% and 40%, respectively) occurred when shoots were elongated on E2 and rooted on 0.1 mg 1ˉ¹ IBA. However, 1.0 mg 1ˉ¹ IBA in the rooting medium severely inhibited survival (0 – 50%), irrespective of the clone or the elongation treatment used. Overall, cuttings demonstrated the best survival and rooting in the absence of exogenous IBA, which suggested that sufficient endogenous auxin was present within the shoots for successful root induction. The application of exogenous IBA may have disrupted the cuttings’ endogenous PGR balance resulting in an inhibition of survival and rooting. In vitro shoots required a low concentration of IBA (0.1 mg 1ˉ¹) in order to counteract the antagonistic effect of cytokinins that were supplied during the multiplication and elongation culture stages, and promote rhizogenesis. Essentially, both cuttings and in vitro shoots demonstrated adverse survival and rooting responses when subjected to excessively high IBA concentrations. / Thesis (M.Sc.)-University of KwaZulu-Natal, Durban 2013.

The methods presented in this study are aimed at the identification of subpopulations (clones) of genetically similar cells within tissue samples through measurement of loci-specific Fluorescence in-situ hybridization (FISH) spot signals for each nucleus and analyzing cell spatial distributions by way of Voronoi tessellation and Delaunay triangulation to robustly define cell neighbourhoods. The motivation for the system is to examine lung cancer patient for subpopulations of Non-Small Cell Lung Cancer (NSCLC) cells with biologically meaningful gene copy-number profiles: patterns of genetic alterations statistically associated with resistance to cis-platinum/vinorelbine doublet chemotherapy treatment. Current technologies for gene-copy number profiling rely on large amount of cellular material, which is not always available and suffers from limited sensitivity to only the most dominant clone in often heterogeneous samples. Thus, through the use of FISH, the detection of gene copy-numbers is possible in unprocessed tissues, allowing identification of specific tumour clones with biologically relevant patterns of genetic aberrations. The tissue-wide characterization of multiplexed loci-specific FISH signals, described herein, is achieved through a fully automated, multicolour fluorescence imaging microscope and object segmentation algorithms to identify cell nuclei and FISH spots within. Related tumour clones are identified through analysis of robustly defined cell neighbourhoods and cell-to-cell connections for regions of cells with homogenous and highly interconnected FISH spot signal characteristics. This study presents experiments which demonstrate the system’s ability to accurately quantify FISH spot signals in various tumour tissues and in up to 5 colours simultaneously or more through multiple rounds of FISH staining. Furthermore, the system’s FISH-based cell classification performance is evaluated at a sensitivity of 84% and specificity 81% and clonal identification algorithm results are determined to be comparable to clone delineation by a human-observer. Additionally, guidelines and procedures to perform anticipated, routine analysis experiments are established.

Diss. (sammanfattning) Umeå : Sveriges lantbruksuniv., 2007. / Härtill 11 uppsatser.

Diss. (sammanfattning). Uppsala : Sveriges lantbruksuniv. / Härtill 5 uppsatser.

Thesis (M.Sc.)--Acadia University, 1999. / Includes bibliographical references (leaves 44-59). Also available on the Internet via the World Wide Web.

Thesis (M.Sc.)--Acadia University, 1999. / Includes bibliographical references (leaves 44-59). Also available on the Internet via the World Wide Web.

Submitted by Reginaldo Soares de Freitas (reginaldo.freitas@ufv.br) on 2017-05-09T12:59:55Z No. of bitstreams: 1 texto completo.pdf: 148738 bytes, checksum: db435e6755522d4b7afb5ac4bd69a7a7 (MD5) / Made available in DSpace on 2017-05-09T12:59:55Z (GMT). No. of bitstreams: 1 texto completo.pdf: 148738 bytes, checksum: db435e6755522d4b7afb5ac4bd69a7a7 (MD5) Previous issue date: 2003-08-01 / Coordenação de Aperfeiçoamento de Pessoal de Nível Superior / A pesquisa foi conduzida no período de abril de 1999 a junho de 2000, na área experimental do Centro de Ciências Agrárias da Universidade Federal de Roraima, localizada no Campus do Cauamé, município de Boa Vista. Foram utilizados dez clones de mandioca-de-mesa coletados em Roraima. Os clones foram dispostos em delineamento em blocos casualizados, com três repetições, em parcelas subdivididas, sendo os clones nas parcelas e as épocas de colheita nas subparcelas. Adotou-se o espaçamento de 1,0 m entre fileiras e 0,50 m entre plantas. As manivas, com tamanho médio de 20 cm foram plantadas horizontalmente, em sulcos de 10 cm de profundidade. As parcelas foram constituídas por três linhas de 10,0 m de comprimento (30 m2 de área total) com 1,0 m de bordadura em cada extremidade, deixando-se, uma linha de cada lado das parcelas como bordadura lateral. As avaliações foram realizadas aos sete e treze meses após o plantio. As características avaliadas relacionadas a folhas foram: cor da folha desenvolvida, cor do pecíolo, número de lóbulos, morfologia do lóbulo, sinuosidade do lóbulo comprimento do lóbulo médio (cm) e florescimento; relacionada ao caule foi altura da planta e relacionada a raiz foram: pedúnculo, cor externa da raiz, superfície da película, facilidade de colheita, diâmetro da raiz (cm), comprimento da raiz (cm) e rendimento de raízes frescas (t/ha). Para a avaliação dessas características, a parcela útil foi dividida em quatro partes iguais de 2,0 m de comprimento, sendo tomadas duas partes ao acaso, para a realização das avaliações em cada época de colheita. Todos os clones estudados diferiram morfologicamente entre si. Todos os clones apresentaram a cor verde nas folhas desenvolvidas. As cores do pecíolo entre os clones variaram entre roxo, vermelho, vermelho esverdeado verde avermelhado e verde amarelado. Apenas o clone MX-009 apresentou folhas com cinco lóbulos, os demais apresentaram folhas com sete lóbulos. A forma linear dos lóbulos foi observada em quatro clones (MX-003, MX-005, MX-006 e MX-010), os quais mostraram também sinuosidade, os demais clones apresentaram a forma obovada. Para os comprimentos do lóbulo, os clones MX-002 e MX-009 apresentaram as menores médias, 12,88 cm e 11,07 cm, respectivamente. Estes clones foram os únicos que floresceram durante o período do ensaio e apresentaram as menores alturas de planta nas duas épocas avaliadas. A presença de pedúnculo nas raízes foi observado em seis clones. A maioria dos clones apresentou a cor externa da raiz variando de marrom claro a marrom escuro. Apenas os clones MX-002 e MX-009 apresentaram a superfície da película lisa. Os clones tiveram colheitas consideradas fáceis, excetuando-se o clone MX-007. O diâmetro de raiz diferenciou melhor os clones do que o comprimento das raízes. As maiores produtividades foram obtidas com os clones MX-001, MX-004 e MX-010, correspondendo, aproximadamente a três vírgula três vezes a produtividade média do estado de Roraima que é da ordem 13,5 t/ha. Estes clones também apresentaram aumento significativo para o rendimento de raízes dos sete para os treze meses após o plantio. / This study was carried out from April 1999 to June 2000 in the experimental area pertaining to the Agrarian Sciences Center of the Universidade Federal de Roraima located at Cauamé Campus, Boa Vista county. The samples consisted of ten sweet cassava clones collected in Roraima. The clones were arranged on a randomized block split-plot experimental design with three replicates, with clones in the plots and the harvesting times in subplots. A spacing of 1.0 m among the rows and 0.50 m among plants were used. Cassavas with an average size 20 cm were horizontally planted in furrows of 10 cm depth. The plots consisted of three rows with 10.0 m length (30 m2 total area) and 1.0 m border row at each extremity, by leaving one row on each side of the plots as lateral border row. Seven and thirteen months after planting, the evaluations were accomplished. The following characteristics were evaluated: concerning to the leaf - the color of the totally expanded leaf, petiole color, lobule numbers, lobule morphology, lobule sinuosity, medium lobule length (cm) and flowering; concerning to the stem - the plant height; and concerning to the root - the peduncle, external color of the root, pellicle surface, harvesting easiness, root diameter (cm), root length (cm) and productivity of the fresh roots (t/ha). To evaluate these characteristics, the effective plot was divided into four parts with to 2.0 m length each one, while two of them were randomly taken for accomplishment of the evaluations at each harvesting time. All studied clones differed morphologically among each other. All clones exhibited green color in the fully expanded leaves. The clone petioles showed varied colors such as: purple, red, greenish red, reddish green, and yellowish green. All clones presented leaves with seven lobules, except the clone MX-009 that exhibited only five lobules. The lineal form of the lobules were observed in four clones (MX-003, MX-005, MX-006 and MX-010) which also showed sinuosity; the other clones presented an obovate form. With reference to the length of the lobules, the clones MX-002 and MX-009 presented the lowest averages, that is 12.88 cm and 11.07 cm respectively. These were the unique clones that bloomed during the assay period, and showed the lowest plant heights at both appraised times. The peduncle presence in the roots was observed in six clones. In most of the clones, the external color of the roots varied from light brown to dark brown. Only clones MX-002 and MX-009 exhibited the flat surface pellicle. The clones were easily harvested, exception for the clone MX-007. The root diameter was the better indicator in differentiating the clones. The highest productivities were obtained with clones MX-001, MX-004 and MX-010, approximately corresponding to 3.3 times the average productivity in Roraima State, which is 13.5 t/ha. These clones also showed a significant increase for root production from seven to thirteen months after planting.

SANTOS, F. H. C. Estimativas de parâmetros genéticos e identificação de QTLs candidatos em cajueiro. 2012. 138 f. Tese (Doutorado em Agronomia/Fitotecnia) - Centro de Ciências Agrárias, Universidade Federal do Ceará, Fortaleza, 2012. / Submitted by Francisco Lacerda (lacerda@ufc.br) on 2014-07-03T20:01:13Z No. of bitstreams: 1 2012_tese_fhcsantos.pdf: 6618925 bytes, checksum: 0e243cdd285977c8625b1bf191ad93e7 (MD5) / Approved for entry into archive by José Jairo Viana de Sousa(jairo@ufc.br) on 2014-07-16T20:21:36Z (GMT) No. of bitstreams: 1 2012_tese_fhcsantos.pdf: 6618925 bytes, checksum: 0e243cdd285977c8625b1bf191ad93e7 (MD5) / Made available in DSpace on 2014-07-16T20:21:36Z (GMT). No. of bitstreams: 1 2012_tese_fhcsantos.pdf: 6618925 bytes, checksum: 0e243cdd285977c8625b1bf191ad93e7 (MD5) Previous issue date: 2012 / Knowledge about genetic parameters, identification of quantitative trait loci (QTL) and marker-assisted selection have great interest for genetic improvement. The objectives of this research were to evaluate the yield potential of eighty four clones of cashew, to estimate their genetic parameters and to identify QTLs associated with plant height, canopy diameter, anthracnose, black mold, number of hermaphrodite flower/panicle and nut weight. Considering these objectives, two trials were planted in two different countries (Pacajús and Paraipaba), state of Ceará, Brazil. The experimental phase was conducted in a randomized block design with two replications, two plants per plot. Apart the traits were evaluated during years 2009, 2010 and 2011. Detection of candidate QTLs were realized using the methods non-parametric mapping, interval mapping and multiple QTL mapping. The evidence of genotypic variability was detected in F1 generation to all characters analyzed. The high potential for the selection of genotypes with the best characteristics to resistance to anthracnose and black mold, hermaphrodite flower and yield. The generation F1 clones named as: 1, 16, 17, 41, 57, 65, 76 and 78 were considered the most promising materials for breeding propose. The joint analysis indicated significant genotype by environment interaction for all traits studied. QTLs for traits of agronomic importance were identified with potential for marker-assisted selection. There is presence of QTLs for all traits, explaining between 2.16 to 19.47% of the total phenotypic variation in the traits canopy diameter and hermaphrodite flowers, respectively. QTL analysis over years and places revealed important effects of genotype by environment interaction on QTL detection. This result agrees with the differences found for the average trait among years and places related, among other causes, the alternation of some clones (genotypes) for traits analyzed and the amount of rain for the environment. / O conhecimento sobre os parâmetros genéticos, a identificação de locos de características quantitativas (QTL) e a seleção assistida por marcadores têm grande importância para o melhoramento genético vegetal. Objetivou-se com o presente estudo avaliar o potencial de produção de oitenta e quatro clones de cajueiro, estimar parâmetros genéticos e identificar QTLs associados à altura da planta, diâmetro da copa, antracnose, mofo-preto, número de flores hermafroditas/panícula e peso da castanha. Considerando estes objetivos, dois experimentos foram conduzidos em dois locais (Pacajus e Paraipaba), no estado do Ceará, Brasil. Os experimentos foram conduzidos em delineamento de blocos casualizados com duas repetições e duas plantas por parcela. As características foram avaliadas nos anos 2009, 2010 e 2011. A identificação dos QTLs candidatos foi realizada utilizando os métodos de mapeamento não-paramétrico, mapeamento por intervalo e mapeamento de QTLs múltiplos. Os resultados permitem observar apresença de variabilidade genotípica na geração F1 para todos os caracteres avaliados, com alto potencial para seleção de genótipos superiores, com resistência à antracnose e ao mofo-preto, altas produções de flor hermafrodita/panícula e de castanha. Os clones da geração F1: 1, 16, 17, 41, 57, 65, 76 e 78 foram considerados os mais promissores para as características analisadas. A análise conjunta indicou a presença de interação genótipo x ambiente para todas as características estudadas. Há presença de QTLs para todos os caracteres avaliados, explicando entre 2,16% a 19,47% da variação fenotípica total nos caracteres diâmetro de copa e flores hermafroditas, respectivamente. As análises de QTL ao longo dos anos e locais revelaram efeitos importantes da interação genótipo x ambiente na detecção de QTL. Este resultado concorda com as diferenças encontradas na média das características ao longo dos anos e locais, estando relacionada, entre outras causas, à alternância de alguns clones (genótipos) para as características analisadas e a quantidade de chuva por ambiente.

Made available in DSpace on 2016-06-02T20:34:30Z (GMT). No. of bitstreams: 1 3964.pdf: 8678187 bytes, checksum: 643fa74aaff8a51581ec49a4b56d9c8a (MD5) Previous issue date: 2011-07-29 / Financiadora de Estudos e Projetos / The aim of the first part of this work was to apply the concept of metabolomic analyses in urine samples obtained from humans diagnosed with type 2 diabetes mellitus (T2DM) and impaired glucose tolerance (IGT) and treated with yerba-mate (Ilex paraguariensis) infusions using nuclear magnetic resonance. T2DM is the most recurrent type of diabetes and corresponds to about 85-90% of DM cases. Brazil is the fifth country with the largest number of people diagnosed with DM and it was estimated that in 2010 about 40 thousand people died due to diabetes. Yerba-mate (Ilex paraguariensis) is a tree which belongs to the family aquifoliaceas and it is originated from the subtropical region of South America. Among several phytochemicals present in yerba-mate the most important are phenolic compounds, saponins and methylxanthines. The use of yerba-mate as a functional food is relatively recent and earlier studies have shown that aqueous extracts of Ilex paraguariensis, which are rich in phenolic compounds, are capable of inhibit the formation of the advanced glycation end-products. Nuclear magnetic resonance (1H NMR and two-dimensional experiments) was capable of identify and quantify the major metabolites present in the human urine samples diagnosed with T2DM and IGT. The relatively quantification of the metabolites alanine, DMA, citrate, creatinine, betaína and TMAO showed that the intake of yerba-mate infusions could assist in the treatment of DM. The aim of the second part of this work was to apply the concept of metabolomic analyses in latex samples using the nuclear magnetic resonance technique as an analytical tool to evaluate the influence of rootstock on grafting, the quality of latex from different Abstract xiv DQ - UFSCar rubber tree clones and the latex with high and low production of poliisoprene belonging to the same clone. The production and consumption of natural rubber in Brazil is gradually growing, however the consumption rate is superior to the production rate causing deficits and rising imports of the product. The rubber tree clones in Brazil were created and studied in order to fight South America Leaf Blight, however the focus of recent works have been the developments of clones with high poliisoprene production, wind resistance, better precocity, and panel disease resistance. Nuclear magnetic resonance (1H NMR and two-dimensional experiments) was capable of identify and quantify the major metabolites present in the latex samples. In the study of the influence of rootstock on grafting was possible to distinguish the latex samples from the RR and GG groups. The latex samples from GR group are similar to the latex samples of RR group while the latex samples of RG group are spread between the RR and GG groups. From the several clones studied in this work it was possible to verify that the IAC 505 clone is the most similar to the experiment witness clone RIMM 600. Through the analysis of the 1H NMR spectrum of the IAC 235 latex samples was possible to verify that the most important difference between the latex samples with high and low production of poliisoprene is the concentration of sucrose. / A primeira parte desse trabalho teve como objetivo aplicar o conceito de análise metabolômica em amostras de urina de humanos diagnosticados com diabetes mellitus tipo 2 (DMT2) e pré-diabetes (IGT) e que foram submetidos a um tratamento com infusões de erva-mate (Ilex paraguariensis) utilizando a técnica de ressonância magnética nuclear. A DMT2 é o tipo de diabetes mais frequente e corresponde a aproximadamente 85-90% dos casos de DM. O Brasil é o quinto país com o maior número de pessoas diagnosticadas com DM e estima-se que em 2010 em torno de 40 mil pessoas no Brasil morreram por causa de diabetes. A erva-mate (Ilex paraguariensis) é uma árvore da família das aquifoliáceas, originária da região subtropical da América do Sul. A erva-mate é constituída por diversos fitoquímicos sendo que os mais importantes são os compostos fenólicos, as saponinas e as metilxantinas. O uso da erva-mate como alimento funcional é relativamente recente e estudos anteriores relataram que os extratos de Ilex paraguariensis, ricos em polifenóis, são capazes de inibir a formação dos produtos finais da glicação avançada. A técnica de ressonância magnética nuclear (RMN de 1H e bidimensionais) mostrou-se uma importante ferramenta na identificação e quantificação relativa dos principais metabólitos presentes nas amostras de urina dos pacientes diagnosticados com DMT2 e IGT. Os resultados obtidos para a quantificação relativa dos metabólitos alanina, DMA, citrato, creatinina, betaína e TMAO indicam que a ingestão de infusões de erva-mate pode auxiliar no tratamento da DM. A segunda parte desse trabalho teve como objetivo aplicar o conceito de Resumo xii DQ - UFSCar análise metabolômica em amostras de látex utilizando a ressonância magnética nuclear como ferramenta analítica para avaliar a influência de porta-enxerto sobre enxerto; a qualidade do látex de diferentes clones de seringueira e o látex de alta e baixa produção de poliisopreno do mesmo tipo de clone. A produção e o consumo de borracha natural no Brasil crescem gradativamente, no entanto a taxa de consumo é superior à produção gerando déficits e importações crescentes do produto. Os clones de seringueira no Brasil foram criados e estudados com a principal finalidade de se combater o mal das folhas da seringueira, no entanto trabalhos recentes visam também desenvolver clones com elevada produção de borracha assim como resistência a quebra pelo vento, maior precocidade e resistência às enfermidades do painel. A técnica de ressonância magnética nuclear (RMN de 1H e bidimensionais) mostrou-se uma importante ferramenta na identificação e quantificação relativa dos principais metabólitos presentes nas amostras de látex. No estudo da influência do porta-enxerto sobre enxerto foi possível verificar uma diferença ente as amostras de látex dos grupos RR e GG. As amostras de látex do grupo GR se assemelharam às amostras do grupo RR enquanto as amostras do grupo RG ficaram dispersas entre os grupos RR e GG. Dos diversos clones estudados nesse trabalho verificou-se que o clone IAC 505 foi o que mais se assemelhou ao clone testemunha do experimento RRIM 600. Através da análise do espectro de RMN de 1H das amostras de látex do clone IAC 235, foi possível verificar que a principal diferença existente no perfil metabólico das amostras de alta e baixa produção de poliisopreno é a concentração de sacarose.

Made available in DSpace on 2014-06-11T19:30:20Z (GMT). No. of bitstreams: 0 Previous issue date: 2011-08-17Bitstream added on 2014-06-13T19:00:14Z : No. of bitstreams: 1 faragoescobar_j_me_botfca.pdf: 867288 bytes, checksum: 4fd2465a07c814ad9739c937eb618889 (MD5) / Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP) / A cultura da seringueira está se firmando como uma atividade lucrativa e sustentável, apresentando um expressivo crescimento em suas áreas de plantio no Brasil. Estabelecidos com o objetivo principal de produção do látex, os seringais apresentam, ao final desse ciclo, boas perspectivas como fornecedores de matéria-prima para o segmento de produtos de madeira sólida. Estudos já realizados mostraram a viabilidade técnica de laminação (a quente e também a frio) de toras de Hevea brasiliensis, para a produção de compensados, como opção de aproveitamento com maior valor agregado dessa madeira. Este trabalho teve como objetivo principal avaliar o desempenho físico-mecânico de painéis compensados de Hevea brasiliensis (clone RRIM 600) confeccionados com lâminas classificadas pelo método não destrutivo das ondas de tensão em classes de desempenho mecânico (baixo, médio e alto módulo de elasticidade dinâmico relativos). As avaliações foram realizadas em painéis compensados confeccionados com lâminas de 2,3 mm de espessura, produzidos na Indústria de Compensados Caribea Ltda. localizada no município de São Manuel, São Paulo - Brasil. Com os mesmos equipamentos e variáveis gerais do processo de fabricação dos compensados foram confeccionados três painéis compensados de nove lâminas para cada um dos cinco arranjos assim definidos: T1 – homogêneo baixo (painéis produzidos somente com lâminas de baixo módulo de elasticidade dinâmico); T2 – combinado baixo (painéis produzidos com lâminas de alto módulo de elasticidade dinâmico na face e contra-face e baixo módulo de elasticidade dinâmico no miolo); T3 - alternado (painéis produzidos com lâminas alternadas de alto e baixo... / The cultivation of rubber tree has been settled in as a profitable and sustainable activity, with a significant growth in planted areas in Brazil. Established with the main objective of production of latex, rubber tree plantations have, at the end of this cycle, good prospects as suppliers of raw material for the segment of solid wood products. Previous studies have shown the technical viability for log lamination (hot and cold processes) of Hevea brasiliensis, for plywood production, as an option of higher added value product. This study evaluated physical and mechanical performance of plywood of Hevea brasiliensis (clone RRIM 600) made with graded veneers (stress wave method) in stiffness classes (low, medium and high dynamic modulus of elasticity). Mechanical evaluations were conducted on plywood made with nine 2.3mm thick veneers, produced in the Indústria de Compensados Caribea Ltda, in São Manuel, São Paulo - Brazil. Plywood were made using the same equipment and general variables of the manufacturing process adopted by this industry, considering five arrangements: T1 – homogeneous low (plywood produced with only low dynamic modulus of elasticity veneers); T2 – combined low (plywood produced with high dynamic modulus of elasticity veneers in the face and back and low dynamic modulus of elasticity veneers in the inner); T3 – alternate (plywood produced with alternated quality veneers - high and low modulus of elasticity); T4 – homogeneous medium (plywood produced with only medium dynamic modulus of elasticity veneers); T5 – combined medium (plywood produced with high dynamic... (Complete abstract click electronic access below)