Limited movement of an avian hybrid zone in relation to regional variation in magnitude of climate change

Alexander, Alana; Robbins, Mark B.; Holmes, Jesse; Moyle, Robert G.; Peterson, A. Townsend

doi:10.1111/mec.16727

Cited by 6 publications

(3 citation statements)

References 99 publications

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“…The genomic cline analysis was performed using the R package 'gghybrid' [16,52], which has been applied in a number of other studies [53][54][55]. This package uses Fitzpatrick's logit-logistic genomic cline function [13] and estimates parameters v (locus-specific cline steepness relative to genome-wide hybrid index) and centre (the genome-wide hybrid index at which locus-specific allele frequency is halfway between those of the ancestral populations S0 and S1).…”

Section: Genomic Cline Analysismentioning

confidence: 99%

Mapping restricted introgression across the genomes of admixed indigenous African cattle breeds

Friedrich,

Bailey,

Talenti

et al. 2023

Genet Sel Evol

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Background The genomes of indigenous African cattle are composed of components with Middle Eastern (taurine) and South Asian (indicine) origins, providing a valuable model to study hybridization and to identify genetic barriers to gene flow. In this study, we analysed indigenous African cattle breeds as models of hybrid zones, considering taurine and indicine samples as ancestors. In a genomic cline analysis of whole-genome sequence data, we considered over 8 million variants from 144 animals, which allows for fine-mapping of potential genomic incompatibilities at high resolution across the genome. Results We identified several thousand variants that had significantly steep clines (‘SCV’) across the whole genome, indicating restricted introgression. Some of the SCV were clustered into extended regions, with the longest on chromosome 7, spanning 725 kb and including 27 genes. We found that variants with a high phenotypic impact (e.g. indels, intra-genic and missense variants) likely represent greater genetic barriers to gene flow. Furthermore, our findings provide evidence that a large proportion of breed differentiation in African cattle could be linked to genomic incompatibilities and reproductive isolation. Functional evaluation of genes with SCV suggest that mitonuclear incompatibilities and genes associated with fitness (e.g. resistance to paratuberculosis) could account for restricted gene flow in indigenous African cattle. Conclusions To our knowledge, this is the first time genomic cline analysis has been applied to identify restricted introgression in the genomes of indigenous African cattle and the results provide extended insights into mechanisms (e.g. genomic incompatibilities) contributing to hybrid differentiation. These results have important implications for our understanding of genetic incompatibilities and reproductive isolation and provide important insights into the impact of cross-breeding cattle with the aim of producing offspring that are both hardy and productive.

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Section: Genomic Cline Analysismentioning

confidence: 99%

Mapping restricted introgression across the genomes of admixed indigenous African cattle breeds

Friedrich,

Bailey,

Talenti

et al. 2023

Genet Sel Evol

View full text Add to dashboard Cite

show abstract

“…Studying temporal changes in hybrid zones can be challenging. Time-series data are needed at multiple sites along a transect, but the combination of adequate sampling over space and time is rare (Alexander et al, 2022;Cicero et al, 2021;Leaché et al, 2017).…”

Section: Introductionmentioning

confidence: 99%

“…Studying temporal changes in hybrid zones can be challenging. Time‐series data are needed at multiple sites along a transect, but the combination of adequate sampling over space and time is rare (Alexander et al, 2022; Cicero et al, 2021; Leaché et al, 2017). Modern follow‐up studies to some of the classic hybrid zones have provided valuable insights into the temporal dynamics of hybrid zones, documenting results ranging from temporal stability (Wang et al, 2019) to widening of a hybrid zone (Engebretsen et al, 2016), as well as shifts in location (Aguillon & Rohwer, 2022; Billerman et al, 2019; Carling & Zuckerberg, 2011; Smith et al, 2013; Walsh et al, 2020) or elevation (Morales‐Rozo et al, 2017).…”

Section: Introductionmentioning

confidence: 99%

Temporal stability of the hybrid zone between Calocitta magpie‐jays revealed through comparison of museum specimens and iNaturalist photos

Pizarro

DeRaad

McCormack

2023

Ecology and Evolution

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Hybrid zones are natural experiments for the study of avian evolution. Hybrid zones can be dynamic, moving as species adjust to new climates and habitats, with unknown implications for species and speciation. There are relatively few studies that have comparable modern and historic sampling to assess change in hybrid zone location and width over time, and those studies have generally found mixed results, with many hybrid zones showing change over time, but others showing stability. The whitethroated magpie-jay (Calocitta formosa) and black-throated magpie-jay (Calocitta colliei) occur along the western coast of Mexico and Central America. The two species differ markedly in throat color and tail length, and prior observation suggests a narrow hybrid zone in southern Jalisco where individuals have mixed throat color. This study aims to assess the existence and temporal stability of this putative hybrid zone by comparing throat color between georeferenced historical museum specimens and modern photos from iNaturalist with precise locality information. Our results confirm the existence of a narrow hybrid zone in Jalisco, with modern throat scores gradually increasing from the parental ends of the cline toward the cline center in a sigmoidal curve characteristic of hybrid zones. Our temporal comparison suggests that the hybrid zone has not shifted its position between historical (pre-1973) and modern (post-2005) time periods-a surprising result given the grand scale of habitat change to the western Mexican lowlands during this time. An anomalous pocket of white-throated individuals in the northern range of the black-throated magpie-jay hints at the possibility of prehistorical long-distance introduction. Future genomic data will help disentangle the evolutionary history of these lineages and better characterize how secondary contact is affecting both the DNA and the phenotype of these species.

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Climate change differentially alters distribution of two marten species in a hybrid zone

Chmura,

Olson,

Murdoch

et al. 2024

Ecology and Evolution

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Species' ranges are shifting rapidly with climate change, altering the composition of biological communities and interactions within and among species. Hybridization is among the species interactions that may change markedly with climate change, yet it is understudied relative to others. We used non‐invasive genetic detections to build a maximum entropy species distribution model and investigate the factors that delimit the present and future ranges of American marten (Martes americana) and Pacific marten (Martes caurina) in a contact zone in the Northern Rockies. We found that climate change will decrease the suitable habitat predicted for both species, as well as the amount of overlap in predicted suitable habitat between the species. Interestingly, predicted suitable habitat for Pacific marten extended further north in the study region than our genetic detections for the species, suggesting that biotic factors, such as interactions with American marten, may affect the realized range of this species. Our results suggest that future work investigating the interactions among biotic and abiotic factors that influence hybrid zone dynamics is important for predicting the futures of these two species in this area under climate change.

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Limited movement of an avian hybrid zone in relation to regional variation in magnitude of climate change

Cited by 6 publications

References 99 publications

Mapping restricted introgression across the genomes of admixed indigenous African cattle breeds

Mapping restricted introgression across the genomes of admixed indigenous African cattle breeds

Temporal stability of the hybrid zone between Calocitta magpie‐jays revealed through comparison of museum specimens and iNaturalist photos

Climate change differentially alters distribution of two marten species in a hybrid zone

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