A5082703280- Plant and animal studies
- Lepidoptera: Biology and Taxonomy
- Genetic diversity and population structure
- Animal Behavior and Reproduction
- Insect and Arachnid Ecology and Behavior
- Species Distribution and Climate Change
- Freshwater macroinvertebrate diversity and ecology
- Neurobiology and Insect Physiology Research
- Ecology and Vegetation Dynamics Studies
- Genomics and Phylogenetic Studies
- Spider Taxonomy and Behavior Studies
- Insect symbiosis and bacterial influences
- Insect-Plant Interactions and Control
- Insect Pheromone Research and Control
- Trypanosoma species research and implications
- Fish Ecology and Management Studies
- Phytoplasmas and Hemiptera pathogens
- Amphibian and Reptile Biology
- Evolution and Genetic Dynamics
- Fish biology, ecology, and behavior
- Scarabaeidae Beetle Taxonomy and Biogeography
- Coastal wetland ecosystem dynamics
- Plant Molecular Biology Research
- Chromosomal and Genetic Variations
- Coleoptera Taxonomy and Distribution
Universidad del Rosario
2015-2024
Universidad de Los Andes
2001-2021
City College of New York
2020
American Museum of Natural History
2020
Cornell University
2020
Suffolk County Department of Health Services
2017
Smithsonian Tropical Research Institute
2008-2016
University of Cambridge
2010-2012
The evolutionary importance of hybridization and introgression has long been debated. Hybrids are usually rare unfit, but even infrequent can aid adaptation by transferring beneficial traits between species. Here we use genomic tools to investigate in Heliconius, a rapidly radiating genus neotropical butterflies widely used studies ecology, behaviour, mimicry speciation. We sequenced the genome Heliconius melpomene compared it with other taxa chromosomal evolution Lepidoptera gene flow among...
Most speciation events probably occur gradually, without complete and immediate reproductive isolation, but the full extent of gene flow between diverging species has rarely been characterized on a genome-wide scale. Documenting timing admixture can clarify role geographic isolation in speciation. Here we use new methodology to quantify at different stages divergence Heliconius butterflies, based whole-genome sequences 31 individuals. Comparisons sympatric allopatric populations H. melpomene...
We used 20 de novo genome assemblies to probe the speciation history and architecture of gene flow in rapidly radiating Heliconius butterflies. Our tests distinguish incomplete lineage sorting from introgression indicate that has obscured several ancient phylogenetic relationships this group over large swathes genome. Introgressed loci are underrepresented low-recombination gene-rich regions, consistent with purging foreign alleles more tightly linked incompatibility loci. Here, we identify...
It is widely documented that hybridisation occurs between many closely related species, but the importance of introgression in adaptive evolution remains unclear, especially animals. Here, we have examined role introgressive transferring adaptations mimetic Heliconius butterflies, taking advantage recent identification a gene regulating red wing patterns this genus. By sequencing regions both linked and unlinked to colour locus, found region displays an almost perfect genotype by phenotype...
Hybridisation and introgression can dramatically alter the relationships among groups of species, leading to phylogenetic discordance across genome between populations. Introgression also erode species differences over time, but selection against at certain loci acts maintain postmating barriers. Theory predicts that barriers made up many throughout should lead a broad correlation recombination rate, which determines extent on deleterious foreign alleles will affect neutral physically linked...
Abstract Hybridization allows adaptations to be shared among lineages and may trigger the evolution of new species 1,2 . However, convincing examples homoploid hybrid speciation remain rare because it is challenging demonstrate that hybridization was crucial in generating reproductive isolation 3 Here we combine population genomic analysis with quantitative trait locus mapping species-specific traits examine a case Heliconius butterflies. We show elevatus sympatric both parents has persisted...
Visual preferences are important drivers of mate choice and sexual selection, but little is known how they evolve at the genetic level. In this study, we took advantage diversity bright warning patterns displayed by Heliconius butterflies, which also used during choice. Combining behavioral, population genomic, expression analyses, show that two species have evolved same for red exchanging material through hybridization. Neural regucalcin1 correlates with visual preference across...
Abstract The H eliconius butterflies are a diverse recent radiation comprising multiple levels of divergence with ongoing gene flow between species. recently sequenced genome melpomene allowed us to investigate the genomic evolution this group using dense RAD marker sequencing. Phylogenetic analysis 54 individuals robustly supported reciprocal monophyly . and cydno refuted previous phylogenetic hypotheses that may be paraphylectic respect timareta also formed monophyletic clade closely...
An important goal in evolutionary biology is to understand the genetic changes underlying novel morphological structures. We investigated origins of a complex wing pattern found among Amazonian Heliconius butterflies. Genome sequence data from 142 individuals across 17 species identified narrow regions associated with two distinct red colour elements, dennis and ray. hypothesise that these modules non-coding represent cis-regulatory loci control expression transcription factor optix, which...
Abstract A combination of selective and neutral evolutionary forces shape patterns genetic diversity in nature. Among the insects, most previous analyses roles drift selection shaping variation across genome have focused on genus Drosophila. more complete understanding these will come from analyzing other taxa that differ population demography aspects biology. We analyzed signatures neotropical Heliconius butterflies using resequenced genomes 58 wild-caught individuals melpomene another 21...
Natural selection leaves distinct signatures in the genome that can reveal targets and history of adaptive evolution. By analysing high-coverage sequence data from 4 major colour pattern loci sampled nearly 600 individuals 53 populations, we show pervasive on wing patterns Heliconius radiation. The strongest correspond to with greatest phenotypic effects, consistent visual by predators, are found geographically restricted distributions. These recent sweeps similar between co-mimics indicate...
Homoploid speciation generates species without a change in chromosome number via introgressive hybridization and has been considered rare animals. Heliconius butterflies exhibit bright aposematic color patterns that also act as cues assortative mating. heurippa pattern can be recreated by introgression of the H. melpomene red band into an cydno genetic background. Wild males show mating based on we here investigate origin this preference studying first-generation backcross hybrids between...
Homoploid hybrid speciation is the formation of a new species without change in chromosome number. So far, there has been lack direct molecular evidence for hybridization generating novel traits directly involved animal speciation. Heliconius butterflies exhibit bright aposematic color patterns that also act as cues assortative mating. heurippa proposed species, and its pattern can be recreated by introgression H. m. melpomene red band into genetic background yellow banded cydno cordula....
Identifying the genetic changes driving adaptive variation in natural populations is key to understanding origins of biodiversity. The mosaic mimetic wing patterns Heliconius butterflies makes an excellent system for exploring using next-generation sequencing. In this study, we use a combination techniques annotate genomic interval modulating red color pattern variation, identify narrow region responsible divergence and convergence patterns, explore evolutionary history these alleles. We...
Sex-specific pheromones are known to play an important role in butterfly courtship, and may influence both individual reproductive success isolation between species. Extensive ecological, behavioural genetic studies of Heliconius butterflies have made a substantial contribution our understanding speciation. Male pheromones, although long suspected role, received relatively little attention this genus. Here, we combine morphological, chemical analyses male the Neotropical melpomene. First,...
The genus Xanthomonas comprises several plant pathogenic bacteria affecting a wide range of hosts. Despite the economic, industrial and biological importance Xanthomonas, classification phylogenetic relationships within are still under active debate. Some between pathovars species have not been thoroughly clarified, with old becoming new species. A change in name has recently suggested for albilineans, an early branching currently located this genus, but thorough phylogenomic reconstruction...
Sex chromosomes are disproportionately involved in reproductive isolation and adaptation. In support of such a "large-X" effect, genome scans between recently diverged populations species pairs often identify distinct patterns divergence on the sex chromosome compared to autosomes. When measures higher autosomes, could be interpreted as evidence for faster chromosome, that is "faster-X", barriers gene flow chromosome. However, demographic changes can strongly skew estimates not always taken...
Abstract Understanding the genetic basis of phenotypic variation and mechanisms involved in evolution adaptive novelty, especially radiations, is a major goal evolutionary biology. Here, we used whole‐genome sequence data to investigate origin yellow hindwing bar Heliconius cydno radiation. We found modular associated with phenotype two narrow noncoding regions upstream downstream cortex gene, which was recently identified as pigmentation pattern controller multiple species . Genetic at each...