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Genetic basis of adaptation of manakins (Passeriformes: Pipridae) to Neotropical habitats

Grant number: 20/07556-8
Support type:Scholarships in Brazil - Post-Doctorate
Effective date (Start): November 01, 2020
Effective date (End): October 31, 2022
Field of knowledge:Biological Sciences - Genetics - Animal Genetics
Cooperation agreement: NSF - Dimensions of Biodiversity and BIOTA
Principal researcher:Fábio Sarubbi Raposo do Amaral
Grantee:Clarissa Ferreira de Carvalho
Home Institution: Instituto de Ciências Ambientais, Químicas e Farmacêuticas (ICAQF). Universidade Federal de São Paulo (UNIFESP). Campus Diadema. Diadema , SP, Brazil
Associated research grant:18/03428-5 - Dimensions US-BIOTA-Sao Paulo: traits as predictors of adaptive diversification along the Brazilian Dry Diagonal, AP.BTA.TEM

Abstract

The process of adaptation to new environments is a keystone for the understanding of evolution. Given adaptation is a complex and multifaceted process, it should be investigated carefully and in depth. To this end, it is imperative to dissect the mechanisms underlying adaptation and the possible routes that could have led to speciation and diversification. Thus, the aim of this work is to investigate the ecological, phenotypic and genomic patterns underlying adaptation to a new habitat. We will test the general hypothesis that divergent selective pressures arising from the new environment contribute to trait differentiation and species divergence. Here, we propose to address this hypothesis three manakins species (Passerines: Pipridae) as the model systems: Antilophia bokermanni, Antilophia galeata and Chiroxiphia caudata. Unlike C. caudata and most manakins species, typically found in humid forests or woodlands, the two Antilophia species inhabit forested pockets in seasonally dry regions in the Brazilian Cerrado biome. As such, we plan to estimate the association between phenotypic variation and divergent habitat conditions, and identify the traits that are more 'plastic' or responsive to environmental variation. By generating a new reference genome and whole-genome re-sequencing data, we plan to characterize the genomic regions with enhanced divergence between the habitats and estimate possible phenotypic effects. In addition, we aim to determine the genomic signatures of selection between populations and species inhabiting divergent habitats. This work is part of an integrative project involving many scientific groups targeting the process of adaptation to the Brazilian Dry Diagonal. (AU)

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