Geographical and environmental contributions to genomic divergence in mangrove forests

Author(s)

Da Silva, Michele Fernandes ^{[1, 2]} ; Cruz, Mariana Vargas ^{[1, 2]} ; Vidal Junior, Joao De Deus ^{[1, 2]} ; Zucchi, Maria Imaculada ^[3] ; Mori, Gustavo Maruyama ^[4] ; De Souza, Anete Pereira ^{[1, 2]}

Affiliation

^[1] Univ Campinas UNICAMP, Inst Biol, Dept Plant Biol, BR-13083863 Campinas, SP - Brazil

^[2] Univ Campinas UNICAMP, Ctr Mol Biol & Genet Engn, BR-13083875 Campinas, SP - Brazil

^[3] Sao Paulo Agcy Agribusiness Technol APTA, BR-13400790 Piracicaba, SP - Brazil

^[4] Sao Paulo State Univ Unesp, Inst Biosci, BR-11330900 Sao Vicente, SP - Brazil

• Document type: Journal article
• Source: Biological Journal of the Linnean Society; v. 132, n. 3, p. 573-589, MAR 2021.
• Web of Science Citations: 0

Abstract

Assessing the relative importance of geographical and environmental factors to the spatial distribution of genetic variation can provide information about the processes that maintain genetic variation in natural populations. With a globally wide but very restricted habitat distribution, mangrove trees are a useful model for studies aiming to understand the contributions of these factors. Mangroves occur along the continent-ocean interface of tropical and subtropical latitudes, regions considered inhospitable to many other types of plants. Here, we used landscape genomics approaches to investigate the relative contributions of geographical and environmental variables to the genetic variation of two black mangrove species, Avicennia schaueriana and Avicennia germinans, along the South American coast. Using single nucleotide polymorphisms, our results revealed an important role of ocean currents and geographical distance in the gene flow of A. schaueriana and an isolation-by-environment pattern in the organization of the genetic diversity of A. germinans. Additionally, for A. germinans, we observed significant correlations between genetic variation with evidence of selection and the influence of precipitation regimens, solar radiation and temperature patterns. These discoveries expand our knowledge about the evolution of mangrove trees and provide important information to predict future responses of coastal species to the expected global changes during this century. (AU)

• FAPESP's process: 13/26793-7 - Evolution of Avicennia schaueriana in face of historical and current climate changes: Functional genomics and ecophysiology
• Grantee: Mariana Vargas Cruz
• Support Opportunities: Scholarships in Brazil - Doctorate
• FAPESP's process: 18/18431-1 - Contribution of environmental and spatial variables to the genetic diversity of Avicennia germinans and A. schaueriana
• Grantee: Michele Fernandes da Silva
• Support Opportunities: Scholarships in Brazil - Master
• FAPESP's process: 14/22821-9 - Population and functional genomics on the evolutionary study of neotropical Rhizophora species in face of historical and current climate changes
• Grantee: Gustavo Maruyama Mori
• Support Opportunities: Scholarships abroad - Research Internship - Post-doctor
• FAPESP's process: 20/00203-2 - Contribution of environmental, geographic and land use and coverage variables to the genetic diversity of Avicennia germinans and Avicennia schaueriana
• Grantee: Michele Fernandes da Silva
• Support Opportunities: Scholarships in Brazil - Doctorate (Direct)
• FAPESP's process: 13/08086-1 - Population and functional genomics and an ecophysiological approach on the evolutionary study of neotropical mangrove species in face of historical and current climate changes
• Grantee: Gustavo Maruyama Mori
• Support Opportunities: Scholarships in Brazil - Post-Doctoral