6 documents found, page 1 of 1
Effect of selective logging on floristic and structural composition in a forest...
Rocha, Karen Janones da; Souza, Édila Cristina de; Favalessa, Cyro Matheus Cometti; Caldeira, Sidney Fernando; Martinez, Diego TyszkaThis study was conducted in one region of a Seasonal Semideciduous Forest located in Tapurah (Mato Grosso State, Brazil) with the aim of studying its floristic and structural composition. The fixed area method was applied to 10 × 250 m clusters, allocating and measuring five clusters with five subunits of 500 m² each. Species with a diameter at breast height greater than or equal to 10 cm were considered, and ...
Genetic variability and selection progress in Eucalyptus progenies
Costa, Reginaldo Brito da; Martinez, Diego Tyszka; Silva, Jeane Cabral da; Almeida, Bruna CristinaThe study aimed to predict genetic values through selection methods and estimate genetic parameters in half-brother progenies of Eucalyptus camaldulensis Dehnh using REML/BLUP procedures. Data were obtained from a progeny test carried out at the Experimental Station of the Federal Institute of Education, Science and Technology of Mato Grosso State– IFMT/Campus São Vicente, in Santo Antônio do Leverger, Mato Gro...
Seleção genética de Acácia mearnsii De Wild. (acácia-negra) visando o aumento d...
Martinez, Diego TyszkaAcacia mearnsii De Wild. (acácia-negra) é uma espécie florestal originária da Austrália, sendo tradicionalmente plantada no estado do Rio Grande do Sul. Plantada comercialmente desde 1930, faz parte do complexo florestal e econômico do estado, envolvendo milhares de pequenos e médios produtores rurais, além dos reflorestamentos realizados pelas indústrias. Em 1983, tiveram início os programas de melhoramento ge...
Avaliação genética sob heterogeneidade de variância residual dentro de tratamentos
Martinez, Diego TyszkaO objetivo dos programas de melhoramento é maximizar o ganho genético para características de valor econômico, com o uso de modelos estatísticos específicos, considerando o delineamento utilizado, buscando alta precisão experimental e acurácia seletiva elevada. Atualmente, o uso de modelos mistos tem sido mais indicado em programas de melhoramento genético, através da metodologia da máxima verossimilhança restr...
Genetic evaluation of Eucalyptus camaldulensis in Mato Grosso State, Brazil
Costa, Reginaldo Brito da; Azevedo, Luana Pâmella de Almeida; Martinez, Diego Tyszka; Tsukamoto Filho, Antonio de Arruda; Fernandes, Dayane ÁvilaThe study aimed to estimate parameters, values and genetic gain for growth traits in progenies of Eucalyptus camaldulensis, in the State of Mato Grosso. The progenies test was conducted under a randomized block design with 132 progenies, five replications and three plants in single rows, spaced 3 m x 2 m in Santo Antonio do Leverger, MT. At 24 months of age, progenies were evaluated for the characters: a) diame...
Prediction methods and heterogeneity effects of residual variances within genet...
Martinez, Diego Tyszka; Resende, Marcos Deon Vilela de; Higa, Antonio Rioyei; Costa, Reginaldo Brito daThe aim of this study was to compare, through simulation, the BLUP and BLUP-HET procedures for breeding values prediction under heterogeneity of residual variances. Random data were generated with spread sheet, considering a variance of 0,10 and variable residual variance, by number of clones, in order toprovide heterogeneity of variances. Actual and residual breeding values obtained were added to the mean 10, ...