Speciation genomic studies aim to interpret patterns of genome-wide variation in light the processes that give rise new species. However, interpreting "landscape" speciation is difficult, because many evolutionary can impact levels variation. Facilitated by first chromosome-level assembly for group, we use whole-genome sequencing and simulations shed on have shaped landscape during a radiation monkeyflowers. After inferring phylogenetic relationships among 9 taxa this radiation, show highly...

Abstract Understanding the phenotypic and genetic architecture of reproductive isolation is a long‐standing goal speciation research. In several systems, large‐effect loci contributing to barrier phenotypes have been characterized, but such causal connections are rarely known for more complex architectures. this study, we combine “top‐down” “bottom‐up” approaches with demographic modelling toward an integrated understanding across monkeyflower hybrid zone. Previous work suggests that...

A current debate within population genomics surrounds the relevance of patterns genomic differentiation between closely related species for our understanding adaptation and speciation. Mounting evidence across many taxa suggests that same regions repeatedly develop elevated in independent pairs. These often coincide with high gene density and/or low recombination, leading to hypothesis landscape mostly reflects a history background selection, reveals little about or comparative approach...

Abstract The sex chromosomes have been hypothesized to play a key role in driving adaptation and speciation across many taxa. reason for this is thought be the hemizygosity of heteromorphic part heterogametic sex, which exposes recessive mutations natural sexual selection. exposure beneficial increases their rate fixation on chromosomes, results faster evolution. In addition, genetic incompatibilities between sex‐linked loci are exposed genomic background hybrids divergent lineages, makes...

Recombination is a central evolutionary process that reshuffles combinations of alleles along chromosomes, and consequently expected to influence the efficacy direct selection via Hill-Robertson interference. Additionally, indirect effects on neutral genetic diversity are show negative relationship with recombination rate, as background hitchhiking stronger when rate low. However, owing limited availability estimates across divergent species, impact changes in genomic signatures remains...

Evolutionary radiations provide excellent opportunities to study the origins of biodiversity, but rapid divergence and ongoing gene flow make inferring evolutionary relationships among taxa difficult. Consequently, combining morphological genomic analyses will be necessary clarify history radiations. We used an integrative approach shed light on within a diverse radiation monkeyflowers (Mimulus section Diplacus) with controversial taxonomic history.We genomewide single nucleotide...

Abstract The sex chromosomes have been hypothesized to play a key role in driving adaptation and speciation across many taxa. reason for this is thought be the hemizygosity of heteromorphic part heterogametic sex, which exposes recessive mutations natural sexual selection. exposure beneficial increases their rate fixation on chromosomes, results faster evolution. In addition, genetic incompatibilities between sex-linked loci are exposed genomic background hybrids divergent species, makes...

ABSTRACT Recombination is a central evolutionary process that reshuffles combinations of alleles along chromosomes, and consequently expected to influence the efficacy direct selection via Hill-Robertson interference. Additionally, indirect effects on neutral genetic diversity are show negative relationship with recombination rate, as background hitchhiking stronger when rate low. However, owing limited availability estimates across divergent species, less known about impact changes in...

Abstract Speciation genomic studies aim to interpret patterns of genome-wide variation in light the processes that give rise new species. However, interpreting ‘landscape’ speciation is difficult, because many evolutionary can impact levels variation. Facilitated by first chromosome-level assembly for group, we use whole-genome sequencing and simulations shed on have shaped landscape during a recent radiation monkeyflowers. After inferring phylogenetic relationships among nine taxa this...

Abstract Understanding the phenotypic and genetic architecture of reproductive isolation is a longstanding goal speciation research. In many systems, candidate barrier traits loci have been identified, but causal connections between them are rarely made. this study, we combine ‘top-down’ ‘bottom-up’ approaches with demographic modeling toward an integrated understanding across monkeyflower hybrid zone. Previous work in system suggests that pollinator-mediated primary to gene flow two...

Abstract A substitution represents the emergence and fixation of an allele in a population or species is fundamental event from which phylogenetic models sequence evolution are devised. Because increasing availability genomic sequences, we now able to take advantage intraspecific variability when reconstructing tree life. As result, substitutions can be more realistically modeled as product mutation, selection, genetic drift. However, it still unclear whether this increased complexity...