Glêison Santos

• PhD Forest Improvement
• Improvement Research at Federal University of Viçosa

Seminal propagation of eucalypt plays a crucial role in breeding programs, serving internal consumption and commercial applications. This study aimed to develop a method for examining anatomical changes in seeds obtained from Eucalyptus crosses to elucidate the causes of seed viability loss and low seed production observed in certain mating pairs....

A inteligência competitiva (IC) é um processo de coleta e análise de informações estratégicas que permite compreender o mercado, identificar oportunidades e mitigar riscos, tornando-se assim uma prática fundamental para organizações tomarem decisões informadas e manterem vantagens competitivas. Apesar do potencial promissor na indústria florestal,...

Schizolobium parahyba var. amazonicum (paricá) is an economically and environmentally important leguminous tree in the Brazilian Amazon, primarily used for wood. No efficient cloning techniques are available for this species, therefore we evaluated the effectiveness of grafting and mound-layering techniques for vegetative propagation of paricá. We...

Este estudo foi realizado com o objetivo de identificar microrganismos causadores de lesões foliares em Euplassa semicostata Plana, com potencial de interferir em seu florescimento. Sete árvores de E. semicostata foram mapeados em um remanescente florestal em Nova Lima, MG. Amostras de folhas destas plantas foram coletadas e enviadas ao laboratório...

O gênero Corymbia, conhecido por sua madeira de alta densidade básica, tolerância ao déficit hídrico e resistência a pragas, emerge como uma promissora alternativa ao Eucalyptus para diversas aplicações industriais. O Projeto Corymbia, uma colaboração entre 21 empresas do setor florestal e a Universidade Federal de Viçosa, tem como objetivo desenvo...

The objective of this study was to perform early selection of the best progenies for traits related to tolerance to water deficit, pests, and diseases in Eucalyptus progeny tests. The experimental trials were set up in a randomized block design, with one plant per plot, and 20 replicates across three distinct locations (Buritizeiro/MG, Bocaiúva/MG,...

O potencial do gênero Corymbia se expressa quando tratamos de inovação e desenvolvimento do setor de árvores plantadas. No entanto, a dificuldade de enraizamento para o gênero é ainda um desafio crucial a ser superado, sendo uma etapa que exerce influência direta na produção de mudas, aspecto de suma importância devido à demanda crescente para uso...

Em 2015, uma seca severa atingiu diferentes regiões do Brasil que, teve como consequência, altas taxas de mortalidade de plantas de eucalipto em plantios comerciais, o que impulsionou programas de melhoramento de diversas empresas do setor florestal. Com o objetivo de desenvolver materiais genéticos tolerantes à seca, foram implantados testes de pr...

Species within the genus Corymbia are regarded as potential alternatives to Eucalyptus. In addition to having superior wood quality, Corymbia spp. are tolerant to most pests, diseases, and abiotic stresses that affecting Eucalyptus plantations, including physiological disorders, water deficit, and wind damage. However, environmental stresses stimul...

A relação comercial entre os países se intensifica cada vez mais, sobretudo com a intensa globalização dos últimos séculos. O comércio florestal vem se destacando, atingindo um saldo positivo na balança comercial brasileira em 2022, de cerca de U$ 13,2 bilhões. A diferença significativa entre os valores de exportação e importação no Brasil se deve...

Coppicing technique is recognized as an effective method for inducing epicormic sprouts and promoting reinvigoration in Brazilian native tree species. However, there remains a knowledge gap regarding efficient reinvigoration techniques for vegetative rescue of paricá trees. This study aimed to evaluate the coppicing technique’s efficacy in inducing...

Species within the genus Corymbia are regarded as potential alternatives to Eucalyptus. In addition to having superior wood quality, Corymbia spp. are tolerant to most pests, diseases, and abiotic stresses that affecting Eucalyptus plantations, including physiological disorders, water deficit, and wind damage. However, environmental stresses stimul...

Multi-trait multi-environment (MTME) models were fitted to eucalyptus breeding trials data to assess residual variance structure, genetic stability and adaptability. To do so, 215 eucalyptus clones were evaluated in a randomized complete block design with 30 replicates and one plant per plot in four environments. At 36 months of age, tree diameter...

Este trabalho aplicou algoritmos de aprendizado de máquina (Machine Learning - ML) para predição futura do Incremento Médio Anual Volumétrico (IMAVol m³/ha/ano) de eucalipto. O conjunto de dados utilizado é composto de variáveis fisiológicas e o IMAVol de plantas de eucalipto de um projeto de melhoramento genético florestal. Aplicando quatro algori...

A promoção do florescimento em espécies arbóreas oferece várias vantagens. A técnica principal envolvida nesse processo é a enxertia, podendo ser combinada ou não com o uso do paclobutrazol. Este artigo revisa os aspectos cruciais relacionados à aplicação dessas técnicas. Diversos estímulos desempenham um papel na transição das plantas da fase vege...

A project proposal to produce the history of Forestry Engineering in Brazil where, when and how this Profession was born in Brazil

A new system to seedling production of Bambusa vulgarise var vulgarise was developed in Brazil at UFRBA and denominated Mini Clumps to replace the actual system existing in the country. A cost reduction was obtained including in the transportation of the seedlings.

The top grafting technique can make early flowering possible and consequently accelerate self-pollination in Eucalyptus breeding, reducing the period of each generation. This study aims to establish a methodology to top graft by applying the growth regulator paclobutrazol in self-pollinated Eucalyptus genotypes to induce early flowering and acceler...

The search for novel biomasses for uses as alternative fiber sources, similar to Eucalyptus spp. biomass, holds great value and potential for commercial-scale application. This study aims to present the hybrid clones of Corymbia spp. developed by Aperam BioEnergia as potential substitutes for Eucalyptus wood in the market pulp industry. By performi...

Forest plantations are strong allies in preserving natural resources, providing social and economic benefits. The plantations carried out in the coming years will be vital to meet the growing demand for forest products. To ensure the continuity of genetic progress and the good results achieved with the improvement of forest species, statistical met...

Ongoing changes in climate, and the consequent mortality of natural and cultivated forests across the globe, highlight the urgent need to understand the plant traits associated with greater tolerance to drought. Here, we aimed at assessing key foliar traits, with a focus on the hydraulic component, that could confer a differential ability to tolera...

O crescimento e a consolidação das indústrias produtoras de polpa celulósica no Brasil, sofreram mudanças com o passar dos anos. Atualmente, a produtividade máxima que antes era tomada como principal objetivo, tem como aliada critérios que visam adequar a madeira para fabricação do produto desejado. Portanto, materiais genéticos superiores de maior...

A defi ciência hídrica afeta diferentes culturas, levando a perdas de produtividade em todo o mundo. Perdas expressivas foram observadas no Brasil, particularmente em 2014, em áreas ocupadas por plantios de eucalipto em função da limitação hídrica, ocasionando quedas signifi cativas de produtividade. Em razão desses efeitos, estudos estão sendo con...

As espécies do gênero Corymbia e seus híbridos apresentam alto crescimento e alta densidade da madeira, resistência a doenças e à maioria das pragas e doenças que causam danos às fl orestas de eucalipto. Contudo, a maioria dos genótipos apresenta exsudação de kino. A seleção de genótipos com menor exsudação de kino é uma alternativa viável, porém,...

O bambu é uma gramínea pertencente à família Poaceae, da subfamília Bambusoideae com ampla distribuição geográfi ca. No Brasil é registrado uma das maiores diversidades desse grupo no mundo. É crescente o interesse de diversos nichos do mercado neste produto, como fi bras, construção civil, móveis. Sendo assim, pesquisas que demonstrem de forma sim...

– Com a mudança de paradigmas estratégicos no mundo corporativo e com o surgimento do conceito de gestão ESG (Environmental, social and Governance), amplo foco legislativo e gerencial tem sido dado à conservação de germoplasma fl orestal. Tendo em vista a necessidade de conservação dos recursos genéticos em projetos de restauração de áreas degradas...

The genetic improvement of tree species takes time. The breeding cycles are long and this makes the process difficult. However, the selection and recombination cycles can be reduced considerably by speeding up the recommendation of new clones using a top grafting method in young seedlings. Eucalyptus top grafting is very promising since this graft...

Processos inovadores de aceleração do fl orescimento de espécies de Eucalyptus por top graftings (enxertias de topo), incluem a possibilidade de redução do tempo dos ciclos no melhoramento fl orestal. Esta permite a produção de linhagens fl orestais e torna o uso da Seleção Genômica Ampla operacional. O objetivo foi estabelecer metodologias para a...

Processos inovadores de aceleração do fl orescimento de espécies de Eucalyptus por top graftings (enxertias de topo), incluem a possibilidade de redução do tempo dos ciclos no melhoramento fl orestal. Esta permite a produção de linhagens fl orestais e torna o uso da Seleção Genômica Ampla operacional. O objetivo foi estabelecer metodologias para a...

A Cannabis sativa L. constitui-se de uma única espécie com altíssima variação intraespecífi ca, isso ocorre porque os espécimes do gênero não encontram nenhum impedimento a reprodução sexuada. São duas variedades de Cannabis spp., uma com maior propensão a produção de fi bras e outra para produção de metabólitos secundários (psicoativos). O cânhamo...

O gênero Eucalyptus ocupa uma extensa área no Brasil, com grande importância econômica. Dentro de programas de melhoramento, a propagação por sementes é viável e utilizada comercialmente, principalmente por pequenos viveiros de mudas e também para produção de jardins clonais. O objetivo desse estudo foi avaliar alterações anatômicas em sementes ori...

The importance of Corymbia species and their interspecific hybrids has been evidenced in forestry programs, due to their wood quality and adaptation to various environmental conditions. To solve the in vitro culture limiting factors of a hybrid Corymbia citriodora × C. torelliana and three C. torelliana × C. citriodora hybrid clones, the present wo...

An accurate, efficient and informative statistical method for analyses of genotype × environment (G × E) interactions is a key requirement for progress in any breeding program. Thus, the objective of this study was to quantify individual variation in reaction norms using random regression models fitted through Legendre polynomials in eucalyptus (Eu...

Resumo A espectroscopia no infravermelho próximo (Near Infrared Spectroscopy, NIRS) é uma técnica não destrutível, rápida e acurada, aplicável em muitas amostras e tem se mostrado como uma ferramenta eficiente na determinação das propriedades químicas, anatômicas, físicas e mecânicas da madeira. O objetivo deste estudo foi desenvolver modelos de ca...

The study of the potential of a plant population makes the selection of a breeding program more efficient, allowing satisfactory genetic gains and identifying the potential of this population, among others, for advances in generations. The genetic potential of Eucalyptus benthamii is still poorly studied. This species has relevant characteristics f...

Reaction norms fitted through random regression models are a powerful tool to identify and quantify the genotype × environment (G × E) interaction and they represent a promising alternative in forest tree breeding for analysis of multi-environment trials. Thus, the objective of this study was to compare random regression models with the compound sy...

Grafting and growth retardants are commonly used in breeding programs to stimulate flower production. However, little is known about their effects on Brazilian tree species. The aim of this study was to investigate the vegetative and reproductive development of grafted tree seedlings treated with paclobutrazol (PBZ) and grown under greenhouse or ou...

O Brasil possui uma grande area em pastagens, a maior parte dela, degradadas, com grande potencial para a producao de biomassa para energia a partir do plantio de eucaliptos adensados, com espaçamentos iniciais variando de 3 m x 0,5 m a 3 m x 1 m e rotação em torno de 2 a 3 anos. No entanto, apesar do grande conhecimento tecnico e cientifico sobre...

A progeny test of half-siblings of Eucalyptus benthamii was analyzed using wood quality traits combined with volumetric information. The test was designed in completely randomized blocks design with a total of 1394 trees planted in the city of Encruzilhada do Sul, Brazil. At six years of age, all the trees were measured and sawing samples were coll...

The aim of this work was to investigate the influence of sample preparation including variation in moisture content and particle size on the accuracy of near infrared (NIR) spectroscopy models developed to predict Klason lignin, total lignin, and holocellulose in wood. Seventy-five samples of sawdust obtained from a eucalyptus plantation were divid...

The aim of this study was to evaluate the growth responses of various Eucalyptus and Corymbia species subjected to different intensities of simulated hypergravity relative to the control. A centrifuge was used to simulate hypergravity. It was developed and built at the Centro de Microgravidade of the Pontifícia Universidade Católica do Rio Grande d...

The aim of this study was to evaluate the growth responses of various Eucalyptus and Corymbia species subjected to different intensities of simulated hypergravity relative to the control. A centrifuge was used to simulate hypergravity. It was developed and built at the Centro de Microgravidade of the Pontifícia Universidade Católica do Rio Grande d...

The present study aimed to evaluate the selection indices efficiency for Pilodyn penetration combined with growth traits in Eucalyptus clones. It was carried out experiments in a randomized block design, with single tree plots and 30 replications. Diameter at breast height (DBH), total height (TH), and Pilodyn penetration as an indicator of basic d...

With the predictability of oil shortage, there is a strong demand for renewable and sustainable raw materials. In this scenario, lignocellulosic material stands out as a potential solution. With the use of bio-refinery, they can be processed into high value added products through chemical, biochemical and thermochemical processes. A great source of...

The present study aimed to evaluate the genetic control and genotype-by-environment interacion in wood weight of Eucalyptus clones in four environments located in the state of Rio Grande do Sul, Brazil, aiming to select superior genotypes. In 2007, a network of clonal tests was established with 864 clones of Eucalyptus. At three years of age, diame...

This paper presents results from a study into the stability and adaptability of Eucalyptus multi-species hybrids in the state of Rio Grande do Sul, Brazil, using an index that includes volume growth and Pilodyn penetration. Clonal tests were established with 146 Eucalyptus clones from 34 different species and/or hybrids, in a randomised block desig...

The present study aimed to evaluate the indirect selection and the "improvement areas" establishment, using the basic wood density character-productivity of Eucalyptus clones in four environments located in the state of Rio Grande do Sul, Brazil (Cambará, Fortaleza, Capivara, São João). The test was conducted in the areas of CMPC Celulose Riogrande...

In eucalyptus crops, it is important to determine the number of plants that need to be evaluated for a reliable inference of growth. The aim of this study was to determine the sample size needed to estimate average trunk diameter at breast height and plant height of inter-specific eucalyptus hybrids. In 6,694 plants of twelve inter-specific hybrids...

The homogeneity of wood color in a batch to be marketed is of fundamental importance, as it will reflect in products quality resulting from its processing. In this context, this study aimed to evaluate, through colorimetric technique, the colorimetric parameters of Eucalyptus spp. wood from 25 clones and classify them into groups, according to colo...

Environmental seasonality plays a key role in the physiological processes of root formation in vegetative reproduction for commercial cloning. The authors hypothesised that (1) subtropical climatic seasonality causes higher rates of Eucalyptus mini-cutting production and rooting during warmer months and (2) the use of mini-tunnels to cover the stum...

Este trabalho objetivou estudar a interação genótipos em ambientes de clones de Eucalyptus em quatro ambientes do Estado do Rio Grande do Sul. Os ensaios foram conduzidos nas áreas da empresa CMPC Celulose Riograndense, nos Municípios de Minas do Leão (Horto Florestal Cambará), Encruzilhada do Sul (Horto Florestal Capivara), Dom Feliciano (Horto Fl...

Mass controlled pollination (MCP), involving large-scale application of pollen on physically isolated female reproductive organs, has been a lower cost alternative to controlled pollination for the commercial production of genetically improved seeds. Nevertheless, rare are the studies that examined the efficacy of operational MCP and no such assess...

A técnica de miniestaquia permitiu o estabelecimento de florestas clonais em larga escala. Porém, pouco se avançou no seu manejo em viveiro para genótipos recalcitrantes. Assim, esse estudo teve como objetivo avaliar a influência do sistema de cortes na base de miniestacas na produção de mudas de um clone híbrido de Eucalyptus urophylla x Eucalyptu...

Mini-cutting technique has allowed establishing large scale clonal forests. However small progress has been observed in nursery management practices for recalcitrant genotypes. The present work aimed to evaluate the influence of different base cut systems in mini-cuttings for seedlings production of a hybrid clone of Eucalyptus urophylla x Eucalypt...

Apesar do progresso da silvicultura clonal alcançado por meio da técnica de miniestaquia, pouco se avançou em relação às espécies recalcitrantes, sobretudo com relação ao manejo empregado em miniestacas. Com o objetivo de avaliar a influência da arquitetura de miniestacas na produção de mudas de quatro clones de Eucalyptus, foram realizadas avaliaç...

Despite the advances on minicutting techniques for clonal silviculture, little progress has been made considering recalcitrant species, especially for the handling in minicuttings practices. The objective was to evaluate the influence of the architecture of minicuttings in the production of four clones of Eucalyptus seedlings. Evaluations in the th...

The objective of this study was to investigate the adaptability multi species hybrid of Eucalyptus in four environments in the state of Rio Grande do Sul. The tests were conducted in the areas of CMPC Celulose Riograndense in the municipalities of Minas do Leão (Cambará farm), Encruzilhada do Sul (Capivara farm), Dom Feliciano (Fortaleza farm) and...

O presente estudo objetivou avaliar parâmetros geneticos associados a heterogeneidade de variâncias e interacao genotipos x ambientes, comparando-se os resultados obtidos pelos procedimentos Blup e Blup-Het, em testes de progenies de Pinus taeda L.. Os experimentos foram instalados sob delineamento de blocos ao acaso com 150 tratamentos, sendo tres...

O objetivo deste trabalho foi avaliar a variabilidade genética e o desempenho silvicultural de clones de híbridos interespecíficos de Eucalyptus urophylla, E. globulus, E. maidenii, E. saligna, E. grandis, E. pellita, E. resinifera, E. kirtoniana e E. dunnii, e determinar a viabilidade da seleção precoce em selecionar clones superiores. Os diâmetro...

The objective of this work was to evaluate the genetic variability and silvicultural performance of clones from interspecific hybrids of Eucalyptus urophylla, E. globulus, E. maidenii, E. saligna, E. grandis, E. pellita, E. resinifera, E. kirtoniana and E. dunnii, and to determine the feasibility of early selection in selecting superior clones. The...

This study evaluated genetic parameters, heterogeneity of residual variances and genotype x environment interaction, comparing the results obtained by Blup and Blup-Het procedures in Pinus taeda L. progeny tests. Experiments were set in random blocks with 150 treatments. Three experiments were located in Santa Catarina state and two were set in Par...

Pinus herrerae Martínez is a little known hard pine that occurs in the western mountain ranges of Mexico between 16° and 28°N latitude and 1800m and 2400m altitude. Seed collections were made from 12 of the 14 populations that were identified through explorations and seedlings were established in either species, species/provenance, provenance/proge...

Aiming at evaluating the efficiency of initial selection of thirteen donor trees for Eucalyptus grandis cloning and their performance in a clonal test, the characteristics diameter (dap), total height (Ht), volume with bark, (VCC), volume without bark (VSC) and bark volume (VC) were assessed along with five "codominant" trees within a 10 m radius o...

The present research aimed at evaluating the effects of branch growth rate in the abundance of free life herbivore insects associated with Caryocar brasiliense in three different habitats (savannah, dry forest, and pasture). In each habitat 20 trees were chosen and in each tree four branches were marked,they were monitored monthly from June to Nove...

This work aimed to evaluate the rooting of five different types of minicuttings (stem, apical stem, intermediate stem, apical stem with removed leaves and leaf), in the vegetative propagation of cedro-rosa (Cedrela fissilis), by applying the minicutting technique, using seedlings material. The results showed that stem cutting was the most efficient...

No presente trabalho objetivou-se avaliar o enraizamento de cinco diferentes tipos de miniestaca (caulinar, caulinar apical, caulinar intermediária, caulinar apical desfolhada e foliar), na propagação vegetativa de cedro-rosa (Cedrela fissilis) por miniestaquia, a partir de material seminal. Os resultados obtidos quanto ao enraizamento indicaram o...

This work had the objective to evaluate the minicutting technique as a method for vegetative propagation of cedro-rosa (Cedrela fissilis), in terms of the production and survival of the ministumps after successive harvesting, as well as rooting and growth (height and root collar diameter) of the minicuttings. The minicuttings were obtained from see...

O objetivo deste trabalho foi avaliar a técnica de miniestaquia como método de propagação vegetativa de cedro-rosa (Cedrela fissilis), quanto à produção e sobrevivência das minicepas nas sucessivas coletas e quanto ao porcentual de enraizamento e do crescimento em altura e diâmetro do colo das miniestacas. As minicepas foram obtidas a partir de mud...