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Adaptability and stability of novel eucalypt species and provenances across environments in Brazil at two assessment

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Abstract

The potential effects of climate change plus the expansion of eucalypt plantations to less favorable sites, beyond those where they are currently planted, requires exploring novel eucalypt germplasm to identify taxa less vulnerable to biotic and abiotic stress. To improve plant adaptation to new environments, the first step is breeding programs and/or forming base populations of new and different species. But, to achieve this, what species should be chosen from the almost 1000 existing eucalypt species? To tackle this question, this work evaluated various eucalypt species from different provenances at two assessment in five environments to verify (1) the need for environmental stratification; (2) the best species and provenances per environment, and (3) environmental stability, adaptability, and changes between assessment. The mortality and diameter at breast height of 27 eucalypt taxa originating from wild populations and seed orchards were evaluated. To evaluate the data, we took a factor analytic mixed modelling approach to define mega-environments (groups of similar sites) and characterize the interactions of these with the selected taxa. The analyses allowed both quantitative and graphical identification of optimal combinations of species and sites. Promising taxa identified include Corymbia citriodora subsp. variegata, C. henryi, Eucalyptus longirostrata, E. major and E. urophylla. We place the results of this process in the context of ongoing domestication and breeding of new taxa for challenging sites in Brazil.

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Acknowledgements

The authors thank University of São Paulo and the companies Amcel, ArborGen, Aperam, Bracell, CMPC, Duratex, Eldorado, International Paper, Klabin, Montes del Plata, Suzano, Vallourec and Veracel that belong to Cooperative Improvement Program of IPEF. Paulo Henrique Müller da Silva and Rinaldo Cesar de Paula are supported by research fellowships granted by the National Council of Technological and Scientific Development (CNPq 302891/2019-6; and 306734/2018-4 respectively).

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Correspondence to Marcio J. Araujo.

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Figure S1.a. Survival and Mean Annual Increment (MAI; m3 ha-1 y-1) of eucalypt taxa evaluated in five environments in Brazil in the assessment range from 1.3 to 2.6 years (PNG 24 kb)

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Figure S1.b. Survival and Mean Annual Increment (MAI; m3 ha-1 y-1) of eucalypt taxa evaluated in five environments in Brazil in the assessment range from 3.3 to 4.8 years (PNG 24 kb)

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Figure S2.a) Polygons of the Genotype-by-Environment interaction (GGE) biplots at the provenance within species levels (assessments ranging from 1.3 to 2.6 years) (PNG 16 kb)

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Figure S2.b. Polygons of the Genotype-by-Environment interaction (GGE) biplots at the provenance within species levels (assessments ranging from 3.3 to 4.8 years) (PNG 16 kb)

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Figure S3.a. Mean performance (BLUPs; in the direction of the red arrow) and stability (length of the dashed line perpendicular to the red arrow axis) for the Diameter of Breast Height (DBH) of several eucalypt taxa (provenance within species). Assessments ranging from 1.3 to 2.6 years (PNG 14 kb)

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Figure S3.b. Mean performance (BLUPs; in the direction of the red arrow) and stability (length of the dashed line perpendicular to the red arrow axis) for the Diameter of Breast Height (DBH) of several eucalypt taxa (provenance within species). Assessments ranging from 3.3 to 4.8 years (PNG 14 kb)

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Figure S4. Map of the trial locations where Eucalyptus and Corymbia species and provenances have been tested in Brazil (PNG 171 kb)

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da Silva, P.H.M., Araujo, M.J., Lee, D.J. et al. Adaptability and stability of novel eucalypt species and provenances across environments in Brazil at two assessment. New Forests 53, 779–796 (2022). https://doi.org/10.1007/s11056-021-09886-7

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  • DOI: https://doi.org/10.1007/s11056-021-09886-7

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