Selection of Eucalypt Clones With Higher Stability in Pulp Yield

Abstract

Forest exploitation is conducted in thousands of hectares in Brazil and presents a wide variation in environmental conditions in terms of soil, climate and even management, so identifying clones that may be recommended for these various conditions is a major challenge. In this recommendation, one important character is the mean annual increment in cellulose (MAICEL). This study aimed to evaluate the interaction of different clones and environments for MAICEL in order to verify whether the origin of clone selection affects their performance in other regions and to identify clones based on adaptability. MAICEL data were used for the evaluation of clones from Suzano S.A. in five environments distributed in the states of Espírito Santo, São Paulo, and Mato Grosso do Sul. Clonal tests were arranged in a randomized block design with plots of one plant. Data on MAICEL of the trees at five years were submitted to analysis of variance per environment and, subsequently, to the joint analysis. The clones x environments interaction was expressive for MAICEL, however, the origin of selection does not affect the performance of clones when grown in other regions. Some clones stood out for their adaptability, allowing more security to the company on the recommendation for different environments.

ASSESSMENT OF INDUSTRIAL PERFORMANCE FOR MARKET PULP PRODUCTION BETWEEN EUCALYPT AND Corymbia HYBRIDS CLONES

“…The results demonstrated the potential of clone ID 4 in the forestry, pulp, and paper industries. PAGR takes into account wood volume, basic density, and yield, refl ecting the amount of pulp that can be produced (Souza et al, 2020). Leading companies in the pulp and paper industry in Brazil report average PAGR values of 10 to 12 ADt of bleached pulp per hectare per year (Foelkel, 2017).…”

Variabilidade espacial das propriedades dendrométricas do Eucalyptus urophylla no Bioma Cerrado

“…As vantagens econômicas atribuídas ao eucalipto são a produção de energia, madeira e celulose. O cultivo dessa espécie florestal pode também contribuir com a conservação da biodiversidade e, por meio de sistemas de integração, com a recuperação de áreas degradadas e a redução da intensidade de erosão (Souza et al, 2020).…”

Selection of clones of Eucalyptus camaldulensis (Dehnh.) based on stability for tree volume

“…Genotype by Environment (GXE) Interaction in breeding is a result of the varied genetic correlations among the environments (Xie, 2003) and differential responses of specific genotypes to environmental conditions (Paul et al, 1997). The presence of GEI indicates that the performance of the clones depends upon the environment and the planting material should be matched to the environment not only to ensure successful plantations but also to minimise the risks in clonal selection (Wahid et al, 2012;Xiao et al, 2019;Souza et al, 2020). Studies on GEI help to identify the environment for a set of genotypes with similar growth and yield performances and also genotypes with lesser interactions that can be deployed to a wide range of environments (Hebert et al, 1995;Bentzer et al,1997;Baltunis and Brawner;Thanh et al, 2016).…”