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Made available in DSpace on 2021-06-26T08:03:35Z (GMT). No. of bitstreams: 0 Previous issue date: 2021-08-15 Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES) In general, genetic improvement programs for Eucalyptus seek to increase productivity. Diallelic methods are commonly used in crossbreeding designs, but few studies use this methodology to assess competitive ability. The aim of this study was to estimate the competitive capacity and effects of intra- and inter-genotypic in Eucalyptus spp. clones and identify combinations that support increased productivity. To do this, 12 commercial clones were evaluated in a competitive trial located in Tres Lagoas, Mato Grosso do Sul State, Brazil, established in a randomized block design, with three replicates and five plants per plot. Data for the mean annual increment (MAI) obtained at five years of age were assessed using two statistical approaches. Groups were classified according to specific (ability of the two clones to compete each other) and general competitive ability (average ability of a clone to compete with others). There were differences in the genotypes' ability to suffer or exercise competition. The results obtained showed the best combinations resulted in up to 10% increase in productivity. That combined use of diallelic analysis with the statistical approach which allows for the assessment of the effects of intraand inter-clonal competition, may be useful for Eucalyptus spp. improvement programs, especially in terms of identifying the best combinations for planting when the objective is to obtain gains in crop productivity. Sao Paulo State Univ UNESP, Sch Nat Sci & Engn, Brasil Ave 56, BR-15385000 Ilha Solteira, SP, Brazil Suzano Papel & Celulose, Antonio Trajano Santos 100, BR-79601901 Tres Lagoas, MS, Brazil ArborGen, Dr Emilio Ribas 174, BR-13025140 Campinas, SP, Brazil Sao Paulo State Univ UNESP, Sch Agr & Veterinarian Sci, Prof Paulo Donato Castellane S-N, BR-14884900 Jaboticabal, SP, Brazil Sao Paulo State Univ UNESP, Sch Nat Sci & Engn, Brasil Ave 56, BR-15385000 Ilha Solteira, SP, Brazil Sao Paulo State Univ UNESP, Sch Agr & Veterinarian Sci, Prof Paulo Donato Castellane S-N, BR-14884900 Jaboticabal, SP, Brazil CAPES: 001

Made available in DSpace on 2019-10-06T15:51:20Z (GMT). No. of bitstreams: 0 Previous issue date: 2019-01-01. Added 1 bitstream(s) on 2019-10-09T18:34:58Z : No. of bitstreams: 1 S1984-70332019000200176.pdf: 345602 bytes, checksum: b44287ef7d6751c1c8ec98f34db0afae (MD5) Plantations made up of clones carry genetic uniformity that can compromise production. The use of multiclonal plantations is a possible solution. The objective of this study was to identify effects of competition on silvicultural performance of Eucalyptus spp. commercial clones. The experiment was carried out in a randomized block design with 12 eucalyptus clones, three replicates, and five plants per plot. Clones were evaluated for two competition types, intra-and intergenotypic, at 3 and 5 years of age. Competition parameters were estimated based on the analyses performed. Differences were found between the types of competition at both ages for mean annual increment and wood volume. Clones 8 and 9 stood out from the others in both intra-and intergenotypic competition. At 5 years of age, intergenotypic competition produced productivity gains of 13% in clones 8 and 9 and 4% overall considering wood volume and mean annual increment. São Paulo State University (UNESP) School of Engineering São Paulo State University (UNESP) School of Agricultural and Veterinarian Sciences Suzano SA ArborGen, Cambuí, 13.025-140 São Paulo State University (UNESP) School of Engineering São Paulo State University (UNESP) School of Agricultural and Veterinarian Sciences

Resumo:O objetivo deste trabalho foi determinar o número de repetições, de plantas por parcela e de medições necessário para avaliação de caracteres de crescimento em testes clonais de eucalipto (Eucalyptus spp.). Foram avaliados dados de altura, diâmetro à altura do peito e volume de madeira, em três testes clonais, realizados em delineamento de blocos ao acaso, com 30 (testes 1 e 2) e 10 clones (teste 3), com seis repetições de seis (teste 1) e de 10 (testes 2 e 3) plantas. As avaliações foram realizadas dos 14 aos 74 meses de idade. Foram estimados os coeficientes de repetibilidade e de determinação, bem como os efeitos do acréscimo na frequência das medições sobre a eficiência seletiva. O volume de madeira é a característica com maior variabilidade na parcela e menor repetibilidade; portanto, exige maior número de plantas para que se obtenha elevada exatidão na estimativa do valor real do indivíduo. Em testes clonais de híbridos de Eucalyptus grandisxE. urophylla, recomenda-se o uso de três repetições, com seis plantas por parcela, e de três avaliações, em idades superiores a 2 anos, para que se alcance acurácia seletiva em torno de 90%. Abstract:The objective of this work was to determine the necessary number of replicates, of plants per plot, and of measurements for evaluating growth traits in eucalyptus (Eucalyptus spp.) clonal tests. Data on height, diameter at breast height, and wood volume were evaluated in three clonal tests, performed in a randomized complete block design with 30 (tests 1 and 2) and 10 clones (test 3), with six replicates of six (test 1) and 10 (tests 2 and 3) plants. The evaluations were performed from 14 to 74 months of age. The coefficients of repeatability and determination were estimated, as well as the effects of increasing measurement frequency on selective efficiency. Wood volume is the trait with the greatest variability in the plot and the lowest repeatability; therefore, it requires more plants to obtain high accuracy in the estimate of the individual's true value. In Eucalyptus grandisxE. urophylla hybrid clonal tests, the use of three replicates of six plants per plot and of three evaluations, at ages above 2 years, is recommended in order to achieve a selective accuracy around 90%.

Made available in DSpace on 2015-02-02T12:39:38Z (GMT). No. of bitstreams: 0 Previous issue date: 2014-06-01Bitstream added on 2015-02-02T13:07:44Z : No. of bitstreams: 1 S0100-204X2014000600483.pdf: 542009 bytes, checksum: 0214e0b52034e42525e799ce87b97f5f (MD5) Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP) Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq) Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES) O objetivo deste trabalho foi avaliar a influência da competição intergenotípica em famílias de polinização aberta de Eucalyptus e o seu efeito na eficiência da seleção precoce. Foram realizados dois experimentos, nos quais o volume de madeira foi avaliado em três idades, em delineamento de blocos ao acaso. Dados dos três anos de avaliação (experimento 1, aos 2, 4 e 7 anos; e experimento 2, aos 3, 5 e 7 anos) foram analisados a partir de modelos mistos. Foram estimados: componentes de variância, parâmetros genéticos, ganhos com a seleção, número efetivo, eficiência da seleção precoce, ganho com a seleção por unidade de tempo e coincidência de seleção com e sem uso de covariáveis de competição. O efeito da competição não foi significativo em idades inferiores a três anos, e o ajuste por covariáveis de competição foi desnecessário. A seleção precoce para famílias é eficiente; famílias de hábitos de crescimento tardio são mais vulneráveis à competição, o que prejudica de forma mais pronunciada a sua classificação ao final do ciclo. A seleção precoce mostra-se eficiente de acordo com todos os critérios adotados, e a idade em torno de três anos é a mais recomendada, em razão da alta eficiência e do alto índice de acerto na indicação de árvores e famílias. A adição de covariáveis de competição ao final do ciclo melhora a eficiência da seleção precoce para quase todos os critérios estudados. The objetive of this work was to evaluate the influence of intergenotypic competition in open-pollinated families of Eucalyptus and its effects on early selection efficiency. Two experiments were carried out, in which the timber volume was evaluated at three ages, in a randomized complete block design. Data from the three years of evaluation (experiment 1, at 2, 4, and 7 years; and experiment 2, at 2, 5, and 7 years) were analyzed using mixed models. The following were estimated: variance components, genetic parameters, selection gains, effective number, early selection efficiency, selection gain per unit time, and coincidence of selection with and without the use of competition covariates. Competition effect was nonsignificant for ages under three years, and adjustment using competition covariates was unnecessary. Early selection for families is effective; families that have a late growth spurt are more vulnerable to competition, which markedly impairs ranking at the end of the cycle. Early selection is efficient according to all adopted criteria, and the age of around three years is the most recommended, given the high efficiency and accuracy rate in the indication of trees and families. The addition of competition covariates at the end of the cycle improves early selection efficiency for almost all studied criteria. Universidade Estadual Paulista Júlio de Mesquita Filho Faculdade de Engenharia de Ilha Solteira Unesp Faculdade de Ciências Agrárias e Veterinárias Departamento de Produção Vegetal Unesp FCAV Departamento de Ciências Exatas Arbogen Tecnologia Florestal Universidade Federal da Grande Dourados Faculdade de Ciências Biológicas e Ambientais Universidade Estadual Paulista Júlio de Mesquita Filho Faculdade de Engenharia de Ilha Solteira Unesp Faculdade de Ciências Agrárias e Veterinárias Departamento de Produção Vegetal Unesp FCAV Departamento de Ciências Exatas

Submitted by Guilherme Lemeszenski (guilherme@nead.unesp.br) on 2013-08-22T18:49:51Z No. of bitstreams: 1 S0100-67622009000400020.pdf: 229387 bytes, checksum: 45b878c68b15eeaef438a2c25f88647b (MD5) Made available in DSpace on 2013-08-22T18:49:51Z (GMT). No. of bitstreams: 1 S0100-67622009000400020.pdf: 229387 bytes, checksum: 45b878c68b15eeaef438a2c25f88647b (MD5) Previous issue date: 2009-08-01 Made available in DSpace on 2013-09-30T19:40:17Z (GMT). No. of bitstreams: 2 S0100-67622009000400020.pdf: 229387 bytes, checksum: 45b878c68b15eeaef438a2c25f88647b (MD5) S0100-67622009000400020.pdf.txt: 31540 bytes, checksum: cb76a8c6b814d22ad53545c9a21ba2c9 (MD5) Previous issue date: 2009-08-01 Submitted by Vitor Silverio Rodrigues (vitorsrodrigues@reitoria.unesp.br) on 2014-05-20T15:10:42Z No. of bitstreams: 2 S0100-67622009000400020.pdf: 229387 bytes, checksum: 45b878c68b15eeaef438a2c25f88647b (MD5) S0100-67622009000400020.pdf.txt: 31540 bytes, checksum: cb76a8c6b814d22ad53545c9a21ba2c9 (MD5) Made available in DSpace on 2014-05-20T15:10:42Z (GMT). No. of bitstreams: 2 S0100-67622009000400020.pdf: 229387 bytes, checksum: 45b878c68b15eeaef438a2c25f88647b (MD5) S0100-67622009000400020.pdf.txt: 31540 bytes, checksum: cb76a8c6b814d22ad53545c9a21ba2c9 (MD5) Previous issue date: 2009-08-01 Foram avaliadas três formas de parcelas experimentais (retangular, uma linha - linear e parcela de uma árvore - STP) em testes clonais de Eucalyptus spp, utilizando-se três experimentos, cada um com 18 clones. Foram usados três modelos de análise (mínimos quadrados ordinários - ANOVA tradicional, modelos mistos com fator clone fixo ou com fator clone aleatório - REML/BLUP). Os dois primeiros modelos apresentaram resultados similares. Com REML/BLUP houve estreitamento das predições em relação às amplitudes obtidas com as médias, e essa redução foi proporcionalmente maior com parcelas retangulares e STP. O ordenamento dos clones também foi similar com esses dois tipos de parcelas. É provável que com parcelas STP haja um balanço compensatório das alocompetições, pois se pode trabalhar com maior número de repetições e menor custo. Portanto, com parcelas STP haverá economia de recursos e sem prejuízos para o Programa de Melhoramento Florestal. Three experimental plot forms (rectangular, one line - linear and single tree plot - STP) were evaluated for Eucalyptus spp clonal tests, using three experiments with 18 clones each. Three analysis models (ordinary least square - traditional ANOVA, mixed models with fixed clone factor or with random clone factor- REML/BLUP) were used. The first and second models showed similar results. With REML/BLUP, there was a reduction in the range of prediction compared to the amplitudes obtained employing the means. This reduction was proportionally higher with rectangular and STP plots. The ranking of clones was also similar to these two types of plots. Probably, there was a compensatory balance of alocompetition with STP plots, because it is possible to work with a higher number of repetitions and lower costs. Therefore, the use of STP plots results in resource saving, preventing losses in forest breeding programs. Fibria Universidade Estadual Paulista Departamento de Ciências Exatas UNESP Departamento de Produção Vegetal Universidade Estadual Paulista Departamento de Ciências Exatas UNESP Departamento de Produção Vegetal

Submitted by Guilherme Lemeszenski (guilherme@nead.unesp.br) on 2013-08-22T18:49:49Z No. of bitstreams: 1 S0100-67622008000400006.pdf: 435664 bytes, checksum: 2139d2399be0285218d5f2a6783bfec1 (MD5) Made available in DSpace on 2013-08-22T18:49:49Z (GMT). No. of bitstreams: 1 S0100-67622008000400006.pdf: 435664 bytes, checksum: 2139d2399be0285218d5f2a6783bfec1 (MD5) Previous issue date: 2008-08-01 Made available in DSpace on 2013-09-30T19:40:12Z (GMT). No. of bitstreams: 2 S0100-67622008000400006.pdf: 435664 bytes, checksum: 2139d2399be0285218d5f2a6783bfec1 (MD5) S0100-67622008000400006.pdf.txt: 49387 bytes, checksum: 21f1d79c649ef3cbdd6a2301530096cf (MD5) Previous issue date: 2008-08-01 Submitted by Vitor Silverio Rodrigues (vitorsrodrigues@reitoria.unesp.br) on 2014-05-20T13:13:08Z No. of bitstreams: 2 S0100-67622008000400006.pdf: 435664 bytes, checksum: 2139d2399be0285218d5f2a6783bfec1 (MD5) S0100-67622008000400006.pdf.txt: 49387 bytes, checksum: 21f1d79c649ef3cbdd6a2301530096cf (MD5) Made available in DSpace on 2014-05-20T13:13:08Z (GMT). No. of bitstreams: 2 S0100-67622008000400006.pdf: 435664 bytes, checksum: 2139d2399be0285218d5f2a6783bfec1 (MD5) S0100-67622008000400006.pdf.txt: 49387 bytes, checksum: 21f1d79c649ef3cbdd6a2301530096cf (MD5) Previous issue date: 2008-08-01 Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP) Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq) Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES) O objetivo deste trabalho foi avaliar o desempenho de clones de Eucalyptus spp. em diferentes regimes hídricos, em casa de vegetação, visando subsidiar trabalhos de melhoramento quanto à tolerância ao estresse hídrico. O experimento foi conduzido por 73 dias, em delineamento em blocos casualizados, no esquema fatorial 18 x 4 (18 clones e quatro regimes de irrigação: diária e a cada dois, quatro e seis dias), com quatro repetições. Avaliou-se o incremento relativo em altura, diâmetro do coleto, número de folhas, área foliar, matéria seca de folhas, de caule e de raízes, razão raiz/parte aérea, taxa líquida de fotossíntese, condutância estomática, transpiração e potencial hídrico foliar. As avaliações fisiológicas foram realizadas um dia antes e um dia depois da irrigação de cada tratamento. Todas as características apresentaram diferenças significativas tanto entre os genótipos quanto entre os regimes hídricos. As estimativas do coeficiente de determinação genotípico apresentaram valores acima de 0,86 quanto às características de crescimento e entre 0,46 e 0,84 com relação às fisiológicas. em geral, os clones apresentaram reduções nas características analisadas à medida que a freqüência de irrigação diminuiu, mas em proporções variáveis entre eles. Foi possível identificar material genético promissor para trabalhos de melhoramento visando à tolerância ao estresse hídrico. The aims of this work were to evaluate the growth and physiological traits of eucalypt clones submitted to four irrigation regimes, in a greenhouse, and to subsidiary breeding programs to resistance to water stress. The experiment was carried out in a randomized block design, and a factorial scheme 18 x 4 (18 clones and four irrigation regimes: daily; every two days; every four days; every six days) with four replications during 73 days. It was evaluated the relative growth rate at height, root collar diameter, number of leaves, leaf area, dry matter of the leaves, stem and roots, the root-shoot ratio, the net photosynthesis, stomatal conductance, transpiration and leaf water potential. The physiological evaluations were performed one day before and one day after the irrigation in each treatment. All the evaluated characters presented significant difference among genotypes and water regimes. The estimates of genotypic determination coefficient presented values over 0.86 for growth traits and between 0.46 and 0.84 for physiological ones. The genotypes generally presented reduction in their traits as the frequency of irrigation was decreased, although in variable proportions among them. It was possible to identify promising genotypes for breeding aiming the resistance to drought stress. Centro Universitário de Votuporanga UFSCar PPG-ERN UNESP F.C.A.V. Departamento de Biologia Aplicada à Agropecuária Votorantim Celulose e Papel UNESP F.C.A.V. Departamento de Biologia Aplicada à Agropecuária

Made available in DSpace on 2015-03-18T15:56:27Z (GMT). No. of bitstreams: 0 Previous issue date: 2014-08-01Bitstream added on 2015-03-18T16:28:18Z : No. of bitstreams: 1 WOS000339645900003.pdf: 85069 bytes, checksum: a05ea21397acabcd8d25d6d65d526cd8 (MD5) Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq) Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES) Aim of study: The eucalyptus grows rapidly and is well suitable to edaphic and bioclimatic conditions in several regions of of the world. The aim of this study was to assess the performance of Eucalyptus urograndis hybrids grown under different water availability conditions.Area of study: The study was performed in south-eastern of BrazilMaterial and methods: We evaluated five commercial hybrids cultivated in pots with the substrate maintained at 65, 50, 35 and 20% maximum water retention capacity. The evaluation was based on the following characteristics: total height (cm), diameter (mm), number of leaves, leaf area (dm(2)), and dry weight (g plant(-1)) of leaf, stem +branches, root, shoot and total and root/shoot ratio.Main results: All the characteristics evaluated were adversely affected by reduced availability of water in the substrate. The hybrids assessed performed differently in terms of biometric characteristics, irrespective of water availability. Water deficit resulted in a greater reduction in the dry weight production compared to number of leaves, diameter and height. Hybrids H2 and H5 have favorable traits for tolerating drought. The hybrid H2 shows a stronger slowdown in growth as soil moisture levels drop, although its growth rate is low, and H5 increases the root/shoot ratio but maintains growth in terms of height, even under drought conditions.Research highlights: The results obtained in our experiment show that productive hybrids sensitive to drought could also perform better under water deficit conditions, maintaining satisfactory growth despite significant drops in these characteristics. Univ Estadual Paulista, Dept Prod Vegetal, Fac Ciencias Agr & Vet, UNESP, BR-14884800 Jaboticabal, SP, Brazil Fac Sao Luis Jaboticabal, BR-14870370 Jaboticabal, SP, Brazil Fibria Celulose & Papel, BR-79620970 Tres Lagoas, MS, Brazil Univ Estadual Paulista, Dept Prod Vegetal, Fac Ciencias Agr & Vet, UNESP, BR-14884800 Jaboticabal, SP, Brazil