Abstract
Eremanthus erythropappus (DC.) MacLeish, commonly known as candeia, is a threatened tree species that occurs in Seasonal Semideciduous Forests in Brazil. The tree is valued for the durability of its wood and essential oil production, from which the active agent (alpha-bisabolol) is used in pharmaceutical and cosmetic industries. Due to its high economic value, E. erythropappus has been exploited for several decades. Natural populations have been reduced, with the subsequent ecological and genetic negative impacts. We aimed to use a landscape genetics approach to identify if natural features influence the genetic diversity of E. erythropappus. In order to assess the genetic variability and provide information for the conservation of the species, genetics analyses were carried out for 200 individuals from ten natural populations of E. erythropappus. Nine ISSR primers produced 72 bands, of which 57 (79%) were polymorphic. Genetic diversity (\({H}_{E}\)) was 0.30 and gene flow was 1.4 migrants per population. The Bayesian clustering model indicated the occurrence of four genetically distinct populations (K = 4). Results of AMOVA showed high genetic differentiation between populations (30.8 %) and there was positive correlation between genetic and geographic distances (r = 0.632, P = 0.001). Based on a Mantel correlation and the genetic discontinuity among populations, we recommend the implementation of four operational units to support the conservation of this species.
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References
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Acknowledgements
We thank Dr. Evelyn R. Nimmo for the English proofreading of this manuscript. We would like to thank the Department of Forest Science (Departamento de Ciências Florestais), the Federal University of Lavras (Universidade Federal de Lavras). We are also thankful to the reviewers for their thoughtful efforts towards improving the manuscript.
Funding
Funding for this project and a Master’s scholarship were provided by the National Council for Scientific and Technological Development (Conselho Nacional de Desenvolvimento Científico e Tecnologico-CNPq) and the Fundação de Amparo à Pesquisa do Estado de Minas Gerais (FAPEMIG) for the Visiting Researcher Grant to Murilo Malveira Brandão (BPV). This study was financed in part by the Coordenação de Aperfeiçoamento de Pessoal de Nível Superior-Brasil (CAPES)-Finance Code 001.
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All authors contributed to the study conception and design. Material preparation, data collection and analysis were performed by JARdP, LFR, MMB, FdAV, DdC. The first draft of the manuscript was written by JAR and all authors commented on previous versions of the manuscript. All authors read and approved the final manuscript.
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de Pádua, J.A.R., Rocha, L.F., Brandão, M.M. et al. Title: priority areas for genetic conservation of Eremanthus erythropappus (DC.) MacLeish in Brazil. Genet Resour Crop Evol 68, 2483–2494 (2021). https://doi.org/10.1007/s10722-021-01144-1
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DOI: https://doi.org/10.1007/s10722-021-01144-1