GENETIC CONTROL AND GENOTYPE-BY-ENVIRONMENT INTERACTION OF WOOD WEIGHT IN Eucalyptus CLONES IN THE STATE OF RIO GRANDE DO SUL, BRAZIL

Santos, Glêison Augusto dos; Nunes, Ana Paula Ferreira; Resende, Marcos Deon Vilela de; Silva, Luciana Duque; Higa, Antônio Rioyei; Assis, Teotônio Francisco de

doi:10.1590/0100-67622016000500010

Cited by 8 publications

(4 citation statements)

References 14 publications

(19 reference statements)

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“…Then, the four physiological tests related to vigor were used to create an index -the phenotypic index of seed vigor (PIV) -to conjugate seed physiological attributes into a unique tendency. Therefore, this index was elaborated from the FC, G, AA, and EC traits (Santos et al, 2016;Cruz et al, 2014), according to the following expression: PIV = FC/S FC x G/S G x AA/S AA x EC/S EC , where S FC , S G , S AA , and S EC are the standard deviation of their respective trait, i.e., FC, G, AA, and EC.…”

Section: Methodsmentioning

confidence: 99%

“…In this context, the use of the phenotypic index of seed vigor (PIV) can provide an estimative of the multi-trait response of important seed quality traits, such as first count, germination, accelerated aging, and electrical conductivity, in order to obtain accurate and reliable estimates of the physiological performance of wheat seeds. The multi-trait approach has been used in passion fruit (Oliveira et al, 2008) and eucalyptus (Nunes, 2015;Santos et al, 2016); however, no works dealing with this phenotype index for wheat were found in the literature.…”

Section: Introductionmentioning

confidence: 99%

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Adaptability and stability of wheat genotypes according to the phenotypic index of seed vigor

Szareski

Carvalho

Kehl³

et al. 2018

Pesq. agropec. bras.

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The objective of this work was to evaluate the adaptability and multi-trait stability of wheat (Triticum aestivum) genotypes according to the phenotypic index of seed vigor (PIV). Thirty wheat genotypes were grown in seven environments in the state of Rio Grande do Sul, Brazil, during one crop season. In each environment, a randomized complete block design with three replicates was used. The PIV was elaborated from the following traits: first germination count, germination percentage, accelerated aging, and electrical conductivity. The evaluated phenotypic index makes it possible to define macroenvironments for the production of wheat seeds with high physiological potential and to understand the implications of the genotype x environment interaction. The phenotypic index of seed vigor is effective to rank genotypes considering multi-trait selection related to the vigor of wheat seeds produced in Southern Brazil.

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Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Adaptability and stability of wheat genotypes according to the phenotypic index of seed vigor

Szareski

Carvalho

Kehl³

et al. 2018

Pesq. agropec. bras.

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“…The eucalypt genotype diversity and a advances in the management techniques allow the high productivity of planted forests in diff erent site conditions. Nowadays, the average productivity of commercial eucalypt plantation in Brazil is about 36 m 3 ha -1 and it can reach up to 62 m 3 ha -1 with irrigation Gonçalves et al, 2013;IBÁ, 2016;Santos et al, 2016;Binkley et al, 2017). Most of these eucalypt plantations have been established in spacings ranging from 9 to 12 m 2 to obtain wood for energy, pulp, and paper, among others Eloy et al, 2016;Binkley et al, 2017).…”

Section: Introductionmentioning

confidence: 99%

Growth, Yield and Economic Analysis of an Eucalypt-Soybean Consortium: Effect of the Distance Between Trees Within the Row1

Barbosa

Reis

et al. 2019

Rev. Árvore

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Agroforestry systems (AGF) design should benefit all components of the consortium. The objective of this study was to evaluate the effect of the distance between plants within the row on growth and yield of trees and agricultural crop and on the economic viability of the consortium. The eucalypt was planted in 9.5 x 1.5 m, 9.5 x 2.0 m, 9.5 x 3.0 m and 9.5 x 40 m arrangements, in consortium with soybean. The tree diameter (dbh) and total height (Ht), and the leaf area index (LAI) were measured at 14, 38 and 51 months. Soybean yield was evaluated 24 months after planting eucalypt. An economic evaluation of the consortium was carried out for a planning horizon of seven years. The distance between trees within the row did not affect the tree height, however, larger distances promoted a higher dbh and individual volume. Higher values of basal area and yield were achieved in the 9.5 x 1.5 m arrangement. The LAI was smaller (1.43) in the 9.5 x 4.0 m arrangement, at 38 months, compared to the other arrangements (mean LAI = 1.66). Soybean had it's highest yield (2,317 kg ha-1) in the 9.5 x 4.0 m arrangement. In the economic evaluation, the wood produced in the two denser arrangements was destined for energy, with low market value, making these two arrangements unfeasible economically, although the tree component yield was the highest in the arrangement 9.5 x 1.5 m. The 9.5 x 4.0 m spatial arrangement was the most economically viable, considering the allocation of 40% of the wood for sawing, and the prices and costs assumed in this study. In this arrangement, the soybean yield was the highest, and the planting costs were the lowest when compared to the other arrangements.

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“…Several clones have been developed by companies or public institutions and are continuously genetically improved in breeding programs (FONSECA et al, 2010). However, the performance of such species or the hybrid varies according to the region they are planted, as a result of strong genotype x environment interaction (MORI et al, 1988;Santos et al, 1990;ROCHA et al, 2005;SANTOS et al, 2016).…”

Section: Introductionmentioning

confidence: 99%

GENETIC VARIATION FOR GROWTH VARIABLES OF Eucalyptus benthamii MAIDEN & CAMBAGE AND E. smithii R. T. BAKER PROVENANCES IN SOUTHERN BRAZIL

Konzen

Navroski

Pereira

et al. 2017

CERNE

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Southern Brazil encompasses areas with a subtropical climate, with significant number of frosts, which challenge or even impair growing tropical eucalypts. Eucalyptus benthamii and E. smithii rise as alternative species of subtropical origin with considerable frost-tolerance. Here we accessed the genetic variation for diameter at breast height (DBH), height (H), volume (VOL), bifurcation and straightness of four provenances of E. smithii and two of E. benthamii, cultivated in randomized block design in a farm in Rio Negrinho, Santa Catarina, southern Brazil. We found considerable genetic variability for the traits, all directly associated with the selection for wood production and quality. In general, most of the genetic variability was found within the provenances (Q d ranged from 63.6 to 73.1%), except for straightness (Q d = 13.5% and Q st = 81.9%). Although predicting genetic gains with provenance trials might have some drawbacks, the application of the REML/BLUP method was able to predict genetic gains for the growth variables DBH, H and VOL for provenances of the two species. The highest genetic gains were predicted for a provenance of E. smithii originated from Australia (13% for DBH, 5% for H and 6.1% for VOL). However, the genetic gains from a E. benthamii provenance from Santa Catarina state were not negligible (1.2% for DBH, 1.8 for H and 2.2% for VOL). Our results provide insights for further progeny trials aimed at investigating additive genetic variance and their components, which could improve the genetic control of the traits and assist breeding programs of E. smithii and E. benthamii. VARIAÇÃO GENÉTICA PARA VARIÁVEIS DE CRESCIMENTO DE PROCEDÊNCIAS DE Eucalyptus benthamii MAIDEN & CAMBAGE E E. smithii R. T. BAKER DO SUL DO BRASILRESUMO: O Sul do Brasil apresenta áreas com clima subtropical, com número significativo de geadas, que dificultam ou, até mesmo, impossibilitam o crescimento de eucaliptos tropicais. Eucalyptus benthamii e E. smithii surgem como espécies alternativas de origem subtropical com considerável tolerância a geadas. Estudou-se a variação genética para diâmetro a altura do peito (DAP), altura (H), volume (VOL) e tortuosidade em quatro procedências de Eucalyptus smithii e duas de E. benthamii, plantadas em delineamento em blocos casualizados em área experimental do município de Rio Negrinho, Santa Catarina, sul do Brasil. Foi encontrada variabilidade genética considerável para os caracteres investigados, todos diretamente associados com a seleção para produção e qualidade da madeira. Em geral, a maior proporção da diversidade genética foi encontrada dentro das procedências (Q d variou de 63,6 a 73,%), exceto para tortuosidade (Q d = 13,5% e Q st = 81,9%). Embora a predição de ganhos genéticos com testes de procedências apresente limitações, o emprego do método REML/ BLUP permitiu predizer ganhos genéticos para as variáveis DAP, H e VOL nas procedências e indivíduos das duas espécies. Os ganhos genéticos mais elevados foram preditos para uma procedência de E. smithii orig...

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GENETIC CONTROL AND GENOTYPE-BY-ENVIRONMENT INTERACTION OF WOOD WEIGHT IN Eucalyptus CLONES IN THE STATE OF RIO GRANDE DO SUL, BRAZIL

Cited by 8 publications

References 14 publications

Adaptability and stability of wheat genotypes according to the phenotypic index of seed vigor

Adaptability and stability of wheat genotypes according to the phenotypic index of seed vigor

Growth, Yield and Economic Analysis of an Eucalypt-Soybean Consortium: Effect of the Distance Between Trees Within the Row1

GENETIC VARIATION FOR GROWTH VARIABLES OF Eucalyptus benthamii MAIDEN & CAMBAGE AND E. smithii R. T. BAKER PROVENANCES IN SOUTHERN BRAZIL

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