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Population genomics and adaptive variation of the Pitcairnia lanuginosa complex (Bromeliaceae)

Grant number: 16/20273-0
Support type:Scholarships abroad - Research Internship - Doctorate
Effective date (Start): February 01, 2017
Effective date (End): July 31, 2017
Field of knowledge:Biological Sciences - Botany
Principal Investigator:Clarisse Palma da Silva
Grantee:Bárbara Simões Santos Leal
Supervisor abroad: Myriam Heuertz
Home Institution: Instituto de Biociências (IB). Universidade Estadual Paulista (UNESP). Campus de Rio Claro. Rio Claro , SP, Brazil
Local de pesquisa : Institut National de la Recherche Agronomique, Bordeaux Aquitaine (INRA), France  
Associated to the scholarship:14/08087-0 - Phylogeography, adaptive variation and reproductive biology of Pitcairnia lanuginosa complex (Bromeliaceae), BP.DR

Abstract

The understanding of the processes leading to the diversification of lineages and the appearance of new species is particularly important in the world's biodiversity hotspots. Genotyping-by-Sequencing (GBS) approaches have shown promise for studying such processes, even when it involves non-model organisms. In this work, we will use the Pitcairnia lanuginosa complex (Bromeliaceae), which is widely distributed in tropical regions of South America, as a model to study the evolutionary processes underlying the diversity in the Neotropics. For this, we will employ a large data set of SNPs markers defined through double-digest restriction-site associated DNA sequencing (ddRAD-Seq) to determine the role of demographic and adaptive processes on genetic variation and to test the boundaries between lineages within this complex, in a phylogeographic context. Our results about the divergence between the lineages of the P. lanuginosa complex occupying the Brazilian Cerrado and the Central Andean Yungas will provide insights about the processes that govern the high biodiversity of the South American continent. This study will also help to clarify the role of adaptive responses to drought stress of herbaceous plants occurring in the Cerrado biome. (AU)