GENETIC GAIN FROM DIFFERENT SELECTION METHODS IN Eucalyptus macarthurii PROGENIES IN DIFFERENT ENVIRONMENTS

Engel, Mara Luana; Higa, Antônio Rioyei; Andrejow, Gisela Pedrassani; Flôres, Paulo César; Soares, Izabele Domingues

doi:10.1590/01047760201622032197

Cited by 10 publications

(5 citation statements)

References 17 publications

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“…The capability of genetic material to perform well under a wide range of environmental conditions is an essential factor in improvement programs (MORAES et al, 2014;ENGEL et al, 2016;PUPIN et al, 2018). The term adaptability is used to designate the capacity of the genetic material to take advantage of environmental stimuli, and stability refers to the capacity of genotypes to be have predictably in the face of environmental stimuli (VENCOVSKY; BARRIGA, 1992;MORAIS et al, 2010).…”

Section: Introductionmentioning

confidence: 99%

GENETIC PARAMETERS OF Eucalyptus spp. CLONES IN NORTHEASTERN BRAZIL

Furlan

Tambarussi

Moraes

2020

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Brazil is the largest charcoal producers in the world, with the main centers of charcoal consumption located in the states of Minas Gerais, Mato Grosso do Sul, Espírito Santo, Maranhão, and Pará. Planting of Eucalyptus in the northern and northeastern states of Brazil is relatively new and is limited the lack of genetic materials adapted to the region’s high temperatures and severe, prolonged periods of drought. The objective of this study was to assess the genetic parameters and variability and determine the genotype x environment interaction for drought tolerance in Eucalyptus clonal tests established in two environments in the municipality of Grajaú, Maranhão State, Brazil. The tests were planted in January 2011 in clayey and sandy soils in a randomized complete block design with 130 clones, one plant per plot, and 20 replicates. The studied clones showed high genetic variability for drought tolerance, with coefficients of relative variance () consistently greater than 0.8 for DBH and volume. This indicates high levels of genetic control and less influence of environmental factors on the phenotype, which allows for selection and obtaining gains through breeding. Heritability estimates were high for growth traits, with average clone heritabilities () greater than 0.85, as well as acuracies () above 0.9 for DBH and volume in clone selection. There was a simple interaction between genotype x environment for the clones under the two different soil conditions.

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Section: Introductionmentioning

confidence: 99%

GENETIC PARAMETERS OF Eucalyptus spp. CLONES IN NORTHEASTERN BRAZIL

Furlan

Tambarussi

Moraes

2020

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“…Six progenies showed stability and adaptability in the three study sites (Table 5), and were among the top 20 in all environments. These progenies may be recommended for orchards for the production of improved seeds in all three experimental sites, due to the simple-type G×E interaction, including the attributes stability and adaptability, as also reported in an work with Eucalyptus macarthurii H.Deane & Maiden (Engel et al, 2016).…”

Section: Resultsmentioning

confidence: 59%

Stability and adaptability for wood volume in the selection of Eucalyptus saligna in three environments

Oliveira

Paula

Moraes

et al. 2018

Pesq. agropec. bras.

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The objective of this work was to evaluate the genotype x environment (GxE) interaction in open-pollinated Eucalyptus saligna progenies for simultaneous selection for greater stability and adaptability for wood volume, as well as to compare the selection strategies through combined and individual analyses in three environments. Three experiments were conducted in a randomized complete block design, with four replicates and six plants per plot, with 102 to 122 progenies. Three years after planting, survival rate and wood volume were evaluated. The genetic parameters were estimated by the maximum restricted likelihood and best linear unbiased prediction (REML/Blup) methods, and the stability and adaptability analysis was conducted using the harmonic mean of the relative performance of genetic values (HMRPGV). The highest survival rate (82%) was observed in Sabinópolis and the highest volume (120 m³ ha-1) in Lençóis Paulista. The mean heritability of progenies for the two analyzed variables was considered high, and the genetic correlations between survival rate and volume were weak for all sites. The G×E interaction was significant and of the complex type, with genotype correlation between sites of 47%, indicating that the ranking of the best progenies differed in each studied environment. The analysis of stability and adaptability indicated the possibility of selecting progenies with good performance in the three environments; however, to improve the quality of the evaluated characteristics, it is necessary to select specific progenies for each environment.

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“…Across the ages studied, a negligible difference was observed among the CV g , indicating that selection is possible at 3 and 5 years of age. Engel et al (2016), evaluating early selection in E. macarthurii, observed genetic correlations above 0.63 among the ages studied, but the correlations at younger ages were lower. Sato et al (2010) identified high and positive correlations between the ages of 4 and 21 years in C. maculata.…”

Section: Resultsmentioning

confidence: 85%

Intra-and intergenotypic competition among commercial eucalyptus clones

Pavan

Amaral

Paula

et al. 2019

Crop Breed. Appl. Biotechnol.

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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.

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GENETIC GAIN FROM DIFFERENT SELECTION METHODS IN Eucalyptus macarthurii PROGENIES IN DIFFERENT ENVIRONMENTS

Cited by 10 publications

References 17 publications

GENETIC PARAMETERS OF Eucalyptus spp. CLONES IN NORTHEASTERN BRAZIL

GENETIC PARAMETERS OF Eucalyptus spp. CLONES IN NORTHEASTERN BRAZIL

Stability and adaptability for wood volume in the selection of Eucalyptus saligna in three environments

Intra-and intergenotypic competition among commercial eucalyptus clones

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