Zachariah Gompert

AdmixLD: fast genome-scale inference of ancestry disequilibrium in hybrid zones

Yannick Z. Francioli, Richard H. Adams, Kaas Ballard, Zachariah Gompert et autres

SUMMARY: Hybrid zones represent powerful natural systems for studying reproductive isolation and speciation. One key genomic signature of genetic incompatibilities and epistatic interactions is linkage disequilibrium (LD)-non-random associations between loci from different lineage backgrounds, generated by selection against maladaptive allele combinations. However, …

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AdmixLD: Fast genome-scale inference of ancestry disequilibrium in hybrid zones

Yannick Z. Francioli, Richard H. Adams, Kaas Ballard, Zachariah Gompert et autres

implementation of empirical null + storey's q to detect outliers

Genomic offset is not predictive of recent demographic trends in Lycaeides butterflies

Gbolahan Anthony Reis, Matthew Forister, Lauren Lucas, Arthur Shapiro et autres

Genomic offset (GO) is increasingly used to predict population maladaptation risk under climate change, with larger offsets assumed to indicate greater vulnerability. Despite rapid adoption in conservation planning, it remains unclear how sensitive GO estimates are to key methodological choices, including SNP …

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Genomic forecasts of maladptation in Lycaeides butterflies

Kenen Brysen Goodwin, Samridhi Chaturvedi, Lauren K. Lucas, Zachariah Gompert

Abstract Genomic forecasting approaches based on genotype-environment associations (GEAs) are increasingly used to estimate genomic offsets (GOs), which predict population maladaptation and extinction risk under current or future climatic conditions. Despite their widespread use, only a subset of studies have evaluated how …

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Chromosomal Fusions Promote Speciation in Subterranean Blind Mole Rats

Zhuoran Kuang, Xiaojie Yang, Zachariah Gompert, Qijiao Duan et autres

The genomic mechanisms underlying large-scale chromosomal rearrangements and their evolutionary consequences remain poorly understood. Here, we generated chromosome-level genomes for two sister species pairs of blind mole rats that differ in chromosome numbers. We identified five chromosome fusions during the divergence from …

cn, us, cz, gb, il, ch (code pays fourni par la source)

Mosaic of somatic mutations in one of Earth’s largest organisms, Pando

Rozenn M. Pineau, Karen E. Mock, Jesse Morris, Vachel A. Kraklow et autres

While evolutionary biology traditionally focuses on the spread of mutations within populations, the dynamics of mutational spread within individuals, particularly in long-lived clonally-spreading organisms, remain poorly understood. Here we examine the genetic structure of ‘Pando’, Earth’s largest known quaking aspen (Populus tremuloides) …

us, Afrique du Sud (code pays fourni par la source)

Mosaic of somatic mutations in one of Earth’s largest organisms, Pando

Rozenn M. Pineau, Karen E. Mock, Jesse Morris, Vachel A. Kraklow et autres

While evolutionary biology traditionally focuses on the spread of mutations within populations, the dynamics of mutational spread within individuals, particularly in long-lived clonally-spreading organisms, remain poorly understood. Here we examine the genetic structure of ‘Pando’, Earth’s largest known quaking aspen (Populus tremuloides) …

us, Afrique du Sud (code pays fourni par la source)

Climate and species traits give rise to complex phenological dynamics

G. A. Reis, Matthew L. Forister, Christopher A. Halsch, Clare M Dittemore et autres

Climate change has substantially shifted the phenology of many organisms. These shifts vary across species and habitats and are shaped by species' natural history traits and local environmental conditions, yet the relative importance of these drivers remains unclear. Moreover, climate can have …

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Student-designed experiments fill knowledge gaps about caterpillar-ant symbiosis

Lauren K. Lucas, Zachariah Gompert

Research-based learning is among the highest impact experiences college students can have. For the last four years, undergraduate students from the Honors Program enrolled in the introductory-level biology lab course at Utah State University have been filling gaps in the scientific community’s …

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Admixture in a butterfly species complex creates a genomic mosaic of ancestry with distinct histories for different chromosomes

Zachariah Gompert, Lauren K. Lucas, Alia Donley, James A. Fordyce et autres

Hybridization and admixture give rise to populations with mosaic genomes composed of ancestry segments with distinct origins and histories. Despite a growing number of documented cases of admixture in nature, relatively little is known about how mosaic patterns of ancestry vary simultaneously …

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Estimation of genome-wide coupling in rattlesnake hybrids provides insight into the process of speciation and its progress

Yannick Z. Francioli, Justin M. Bernstein, Richard H. Jr. Adams, Hannah D. Guss et autres

Genomic coupling theory predicts that progress towards speciation involves a transition from the dominant effects of selection on individual barrier loci to the aggregate effects of direct and indirect selection across loci that collectively produce stronger barriers to gene flow through genetic …

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Dual roles of DNA methylation in gene expression and chromatin structure in a stick insect

Nicholas P. Planidin, Clarissa F. de Carvalho, Zachariah Gompert, Patrik Nosil

Abstract Gene body methylation is one of the most taxonomically widespread epigenetic marks, yet its function and evolutionary history are poorly understood. While there is a positive association between gene body methylation and gene expression in many organisms, the mechanisms behind this …

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