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Unravelling the genetic differentiation among varieties of the Neotropical savanna tree Hancornia speciosa Gomes

2018; Oxford University Press; Linguagem: Inglês

10.1093/aob/mcy060

1095-8290

Rosane G. Collevatti, Eduardo E Rodrigues, Luciana Cristina Vitorino, Matheus S. Lima‐Ribeiro, Lázaro José Chaves, Mariana Pires de Campos Telles,

Species Distribution and Climate Change

Spatial distribution of species genetic diversity is often driven by geographical distance (isolation by distance) or environmental conditions (isolation by environment), especially under climate change scenarios such as Quaternary glaciations. Here, we used coalescent analyses coupled with ecological niche modelling (ENM), spatially explicit quantile regression analyses and the multiple matrix regression with randomization (MMRR) approach to unravel the patterns of genetic differentiation in the widely distributed Neotropical savanna tree, Hancornia speciosa (Apocynaceae). Due to its high morphological differentiation, the species was originally classified into six botanical varieties by Monachino, and has recently been recognized as only two varieties by Flora do Brasil 2020. Thus, H. speciosa is a good biological model for learning about evolution of phenotypic plasticity under genetic and ecological effects, and predicting their responses to changing environmental conditions.