Complex Evolutionary History With Extensive Ancestral Gene Flow in an African Primate Radiation

Molecular Biology and Evolution, Год журнала: 2023, Номер 40(12)

Опубликована: Ноя. 21, 2023

Abstract Understanding the drivers of speciation is fundamental in evolutionary biology, and recent studies highlight hybridization as an important force. Using whole-genome sequencing data from 22 species guenons (tribe Cercopithecini), one world's largest primate radiations, we show that rampant gene flow characterizes their history identify ancient across deeply divergent lineages differ ecology, morphology, karyotypes. Some events resulted mitochondrial introgression between distant lineages, likely facilitated by cointrogression coadapted nuclear variants. Although genomic landscapes were largely lineage specific, found genes with immune functions overrepresented introgressing regions, line adaptive introgression, whereas involved pigmentation morphology may contribute to reproductive isolation. In reports other systems might facilitate diversification, find some most species-rich guenon clades are admixed origin. This study provides insights into prevalence, role, outcomes ancestral a large mammalian radiation.

Язык: Английский

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The recombination landscape of introgression in yeast

PLoS Genetics, Год журнала: 2025, Номер 21(2), С. e1011585 - e1011585

Опубликована: Фев. 12, 2025

Meiotic recombination is an evolutionary force that acts by breaking up genomic linkage, increasing the efficacy of selection. Recombination initiated with a double-strand break which resolved via crossover, involves reciprocal exchange genetic material between homologous chromosomes, or non-crossover, results in small tracts non-reciprocal material. Crossover and non-crossover rates vary species, populations, individuals, across genome. In recent years, rate has been associated distribution ancestry derived from past interspecific hybridization (introgression) variety species. We explore this interaction introgression sequencing spores detecting crossovers non-crossovers two crosses yeast Saccharomyces uvarum . One cross strains each contain their sister S. eubayanus , while other no present. find landscape significantly different crosses, some these differences can be explained presence one cross. Crossovers are reduced heterozygous compared to syntenic regions without introgression. This translates allele shuffling within introgressed regions, overall reduction on most chromosomes Our suggest influence landscape, contributes initial purging generations following event.

Язык: Английский

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Reconciling Gene Tree Discordance and Biogeography in European Crows

Molecular Ecology, Год журнала: 2025, Номер unknown

Опубликована: Апрель 10, 2025

ABSTRACT Reconstructing the evolutionary history of young lineages diverging with gene flow is challenging due to factors like incomplete lineage sorting, introgression, and selection causing tree discordance. The European crow hybrid zone between all‐black carrion crows grey‐coated hooded exemplifies this challenge. Most genome in Western Central populations near‐identical crows, but differs substantially from their Iberian congeners. A notable exception a single major‐effect colour‐locus under sexual aligning ‘species’ tree. To understand underlying processes, we reconstructed biogeographic species complex. During Pleistocene took refuge Peninsula Middle East, respectively. Allele‐sharing likewise black at represents last trace ancestry, resisting expanding that have homogenised most genome. model introgression an ancestor into near Pyrenées was significantly less supported. We found no positive relationship recombination rate consistent absence genome‐wide, polygenic barriers Overall, study portrays scenario where few large‐effect loci, subject divergent selection, resist rampant asymmetric exchange. This underscores importance integrating population demography biogeography accurately interpret patterns discordance following divergence.

Язык: Английский

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The recombination landscape of introgression in yeast

bioRxiv (Cold Spring Harbor Laboratory), Год журнала: 2024, Номер unknown

Опубликована: Янв. 5, 2024

Meiotic recombination is an evolutionary force that acts by breaking up genomic linkage, increasing the efficacy of selection. Recombination initiated with a double-strand break which resolved via crossover, involves reciprocal exchange genetic material between homologous chromosomes, or non-crossover, results in small tracts non-reciprocal material. Crossover and non-crossover rates vary species, populations, individuals, across genome. In recent years, rate has been associated distribution ancestry derived from past interspecific hybridization (introgression) variety species. We explore this interaction introgression sequencing spores detecting crossovers non-crossovers two crosses yeast

Язык: Английский

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Heteroplasmy and Individual Mitogene Pools: Characteristics and Potential Roles in Ecological Studies

Biology, Год журнала: 2023, Номер 12(11), С. 1452 - 1452

Опубликована: Ноя. 20, 2023

The mitochondrial genome (mitogenome or mtDNA), the extrachromosomal genome, is a multicopy circular DNA with high mutation rates due to replication and repair errors. A mitochondrion, cell, tissue, organ, an individual body may hold multiple variants, both inherited developed over lifetime, which make up mitogene pools. This phenomenon also called mtDNA heteroplasmy. MtDNA variants influence cellular tissular functions are consequently subjected selection. Although it has long been recognized that only inheritable germline heteroplasmies have evolutionary significance, non-inheritable somatic overlooked since they directly affect fitness thus indirectly fate of heritable variants. review focuses on characteristics, dynamics, heteroplasmy proposes concept pools discuss genetic diversity from angles. We provide unique perspective relationship between guide how pool novel markers can be applied ecological research.

Язык: Английский

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The recombination landscape of introgression in yeast

Опубликована: Март 15, 2024

Meiotic recombination is an important evolutionary force that acts by breaking up genomic linkage, thereby increasing the efficacy of selection. initiated with a double-strand break which resolved via crossover, involves reciprocal exchange genetic material between homologous chromosomes, or non-crossover, results in small tracts non-reciprocal material. While meiotic process largely conserved, crossover and non-crossover rates vary species, populations, individuals, across genome. In recent years, observed to be positively associated distribution ancestry derived from past interspecific hybridization (introgression) variety species. This trend has been interpreted signify introgression carries incompatibilities are selected against, such enriched regions high recombination. However, well known suppressed divergent sequence prevent non-homologous Since introgressed DNA often divergent, we sought explore this interaction sequencing spores detecting events two crosses budding yeast Saccharomyces uvarum . One cross strains isolated natural environments, other fermentation each strain contains their sister S. eubayanus We find landscape significantly different crosses, most these differences can explained presence heterozygous cross. Crossovers reduced non-crossovers increased compared syntenic without introgression. translates allele shuffling within regions, overall reduction on chromosomes Our indicate influence landscape, suggest contributes initial purging generations following event.

Язык: Английский

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The recombination landscape of introgression in yeast

Опубликована: Март 16, 2024

Meiotic recombination is an evolutionary force that acts by breaking up genomic linkage, increasing the efficacy of selection. Recombination initiated with a double-strand break which resolved via crossover, involves reciprocal exchange genetic material between homologous chromosomes, or non-crossover, results in small tracts non-reciprocal material. Crossover and non-crossover rates vary species, populations, individuals, across genome. In recent years, rate has been associated distribution ancestry derived from past interspecific hybridization (introgression) variety species. We explore this interaction introgression sequencing spores detecting crossovers non-crossovers two crosses yeast Saccharomyces uvarum . One cross strains each contain their sister S. eubayanus , while other no present. find landscape significantly different crosses, some these differences can be explained presence one cross. Crossovers are reduced increased heterozygous compared to syntenic regions without introgression. This translates allele shuffling within introgressed regions, overall reduction on most chromosomes Our suggest influence landscape, contributes initial purging generations following event.

Язык: Английский

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Adaptive alien genes are maintained amid a vanishing introgression footprint in a sea squirt

Evolution Letters, Год журнала: 2024, Номер 8(4), С. 600 - 609

Опубликована: Апрель 27, 2024

Abstract Human transport of species across oceans disrupts natural dispersal barriers and facilitates hybridization between previously allopatric species. The recent introduction the North Pacific sea squirt, Ciona robusta, into native range Atlantic intestinalis, is a good example this outcome. Recent studies have revealed an adaptive introgression in single chromosomal region from introduced Here, we monitored over time, examining both frequency alleles at core hitchhiking footprint shoulders island by studying thousand spp. individuals collected 22 ports contact zone, 14 which were sampled 20 generations apart. For that purpose, developed KASP multiplex genotyping approach, proved effective identifying native, nonindigenous hybrid detecting introgressed haplotypes. We found no early generation hybrids entire sample, field observations suggest decline At sweep, where C. robusta highest local adaptation genes must be, observed stable frequencies alien space time. In contrast, erosion ancestry tracts flanking on edges core, consistent with second phase sweep purge hitchhiked incompatible mutations. hypothesize may modified competition relationships invasive human-altered environments.

Язык: Английский

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Recent secondary contact, genome-wide admixture, and asymmetric introgression of neo-sex chromosomes between two Pacific island bird species

PLoS Genetics, Год журнала: 2024, Номер 20(8), С. e1011360 - e1011360

Опубликована: Авг. 22, 2024

Secondary contact between closely related taxa represents a “moment of truth” for speciation—an opportunity to test the efficacy reproductive isolation that evolved in allopatry and identify genetic, behavioral, and/or ecological barriers separate species sympatry. Sex chromosomes are known rapidly accumulate differences species, an effect may be exacerbated neo-sex transitioning from autosomal sex-specific inheritance. Here we report that, Solomon Islands, two bird honeyeater family— Myzomela cardinalis tristrami —carry have come into recent secondary after ~1.1 my geographic isolation. Hybrids were first observed sympatry ~100 years ago. To determine genetic consequences hybridization, use population genomic analyses individuals sampled characterize gene flow zone. Using genome-wide estimates diversity, differentiation, divergence, find degree direction introgression varies dramatically across genome. For sympatric birds, is bidirectional, with phenotypic hybrids parentals both showing admixed ancestry. In other regions genome, however, story different. While on Z/neo-Z-linked sequence limited, W/neo-W mitochondrial (mtDNA) highly asymmetric, moving only invading M . resident The hybridization these has thus enabled some but interaction admixture, asymmetric mate choice, natural selection led variation amount at sex-linked

Язык: Английский

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The recombination landscape of introgression in yeast

Опубликована: Окт. 16, 2024

Meiotic recombination is an evolutionary force that acts by breaking up genomic linkage, increasing the efficacy of selection. Recombination initiated with a double-strand break which resolved via crossover, involves reciprocal exchange genetic material between homologous chromosomes, or non-crossover, results in small tracts non-reciprocal material. Crossover and non-crossover rates vary species, populations, individuals, across genome. In recent years, rate has been associated distribution ancestry derived from past interspecific hybridization (introgression) variety species. We explore this interaction introgression sequencing spores detecting crossovers non-crossovers two crosses yeast Saccharomyces uvarum . One cross strains each contain their sister S. eubayanus , while other no present. find landscape significantly different crosses, some these differences can be explained presence one cross. Crossovers are reduced increased heterozygous compared to syntenic regions without introgression. This translates allele shuffling within introgressed regions, overall reduction on most chromosomes Our suggest influence landscape, contributes initial purging generations following event.

Язык: Английский

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