Range-wide neutral and adaptive genetic structure of an endemic herb from Amazonian Savannas

AoB Plants
A. R. SilvaRodolfo Jaffe

Abstract

Conserving genetic diversity in rare and narrowly distributed endemic species is essential to maintain their evolutionary potential and minimize extinction risk under future environmental change. In this study we assess neutral and adaptive genetic structure and genetic diversity in Brasilianthus carajensis (Melastomataceae), an endemic herb from Amazonian Savannas. Using RAD sequencing we identified a total of 9365 SNPs in 150 individuals collected across the species' entire distribution range. Relying on assumption-free genetic clustering methods and environmental association tests we then compared neutral with adaptive genetic structure. We found three neutral and six adaptive genetic clusters, which could be considered management units (MU) and adaptive units (AU), respectively. Pairwise genetic differentiation (FST) ranged between 0.024 and 0.048, and even though effective population sizes were below 100, no significant inbreeding was found in any inferred cluster. Nearly 10 % of all analysed sequences contained loci associated with temperature and precipitation, from which only 25 sequences contained annotated proteins, with some of them being very relevant for physiological processes in plants. Our findings provide a det...Continue Reading

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Citations

Nov 17, 2020·PhytoKeys·Caroline Oliveira AndrinoDaniela Cristina Zappi
Jul 3, 2021·Animals : an Open Access Journal From MDPI·Lwamkelekile Sitshilelo Mkize, Oliver Tendayi Zishiri
Aug 10, 2021·Ecology and Evolution·Jeronymo DalapicollaGuilherme Oliveira
Oct 8, 2021·Molecular Biology Reports·Paloma Triguero-PiñeroRafael G Albaladejo
Oct 12, 2021·Frontiers in Plant Science·Thais M Teixeira, Alison G Nazareno

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Methods Mentioned

BETA
Assay
PCA

Software Mentioned

adegenet
bbmap
r2vcftools R package
QGIS
DAPC
sPCA
LEA
r2vcftools
LEA package
STRUCTURE

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