We get by with a little help from our friends: shared adaptive variation provides a bridge to novel ecological specialists during adaptive radiation DOI Creative Commons
Emilie J. Richards, Christopher H. Martin

Proceedings of the Royal Society B Biological Sciences, Journal Year: 2022, Volume and Issue: 289(1975)

Published: May 25, 2022

Adaptive radiations involve astounding bursts of phenotypic, ecological and species diversity. However, the microevolutionary processes that underlie origins these are still poorly understood. We report discovery an intermediate C. sp. ‘wide-mouth’ scale-eating ecomorph in a sympatric radiation Cyprinodon pupfishes, illuminating transition from widespread algae-eating generalist to novel microendemic specialist. first show this occurs sympatry with variegatus specialist desquamator on San Salvador Island, Bahamas, but is genetically differentiated, morphologically distinct often consumes scales. then compared timing selective sweeps shared unique adaptive variants trophic specialists characterize their walk. Shared regions swept both ecomorph, followed by introgressed variation de novo . The two populations additionally 9% hard molluscivore brontotheroides , despite no single common ancestor among specialists. Our work provides new framework for investigating how major transitions occur illustrates genetic can provide bridge multiple access niches.

Language: Английский

Hybridization and gene expression: Beyond differentially expressed genes DOI Creative Commons
Anna Runemark, Emily C. Moore, Erica L. Larson

et al.

Molecular Ecology, Journal Year: 2024, Volume and Issue: unknown

Published: Feb. 27, 2024

Gene expression has a key role in reproductive isolation, and studies of hybrid gene have identified mechanisms causing sterility. Here, we review the evidence for altered following hybridization outline shown to contribute hybrids. Transgressive expression, transcending that both parental species, is pervasive early generation sterile hybrids, but also frequently observed viable, fertile We highlight showing can result transgressive established lineages or species. Such extreme patterns stabilized taxa suggest may hybridization-derived evolutionary novelty. conclude while misexpression hybrids are well documented, understanding lagging. argue jointly assessing differences cell composition cell-specific changes addition chromatin methylation, will significantly advance our basis expression. Moreover, uncovering what extent evolution results individual genes, entire networks how selection moulds Finally, studying dual roles serving as mechanism isolation substrate ecological adaptation, lead significant advances

Language: Английский

Citations

4
Role of Skeletal Muscle Vasodilatory Pathway in Adaptive Thermogenesis in Sunit Mongolian Sheep DOI
Fanhua Meng, Zhen Li, Tong Zhou

et al.

Published: Jan. 1, 2025

Language: Английский

Citations

0
Whole-genome resequencing reveals selection signatures in China's first rainbow trout (Oncorhynchus mykiss) strain “Shuike No. 1” DOI

Haibing Ma,

Gaochao Wang,

Tianqing Huang

et al.

Aquaculture, Journal Year: 2025, Volume and Issue: unknown, P. 742606 - 742606

Published: April 1, 2025

Language: Английский

Citations

0
Severe inbreeding, increased mutation load and gene loss-of-function in the critically endangered Devils Hole pupfish DOI Creative Commons
David Tian, Austin H. Patton, Bruce J. Turner

et al.

Proceedings of the Royal Society B Biological Sciences, Journal Year: 2022, Volume and Issue: 289(1986)

Published: Nov. 2, 2022

Small populations with limited range are often threatened by inbreeding and reduced genetic diversity, which can reduce fitness exacerbate population decline. One of the most extreme natural examples is Devils Hole pupfish (

Language: Английский

Citations

17
Widespread reticulate evolution in an adaptive radiation DOI Open Access

Dylan DeBaun,

Nirhy Rabibisoa,

Achille P. Raselimanana

et al.

Evolution, Journal Year: 2023, Volume and Issue: 77(4), P. 931 - 945

Published: Jan. 21, 2023

A fundamental assumption of evolutionary biology is that phylogeny follows a bifurcating process. However, hybrid speciation and introgression are becoming more widely documented in many groups. Hybrid inference studies have been historically limited to small sets taxa, while exploration the prevalence trends reticulation at deep time scales remains unexplored. We study history an adaptive radiation 109 gemsnakes Madagascar (Pseudoxyrhophiinae) identify potential instances introgression. Using several network methods, we find 12 events within 22-million-year gemsnakes, producing 28% diversity for group, including one resulted diversification 18 species radiation. These reticulations found nodes with high gene tree discordance occurred among parental lineages distributed along north-south axis share similar ecologies. Younger hybrids occupy intermediate contact zones between parent showing post-speciation dispersal this group has not eroded spatial signatures Reticulations accumulated consistently over time, despite drops overall rates during Pleistocene. This suggests may decline as result accumulation environmental change, by hybridization be robust these processes.

Language: Английский

Citations

10
Historical biogeography of North American killifishes (Cyprinodontiformes) recapitulates geographical history in the Gulf of México watershed DOI

Sonia Gabriela Hernández-Ávila,

Christopher W. Hoagstrom, Wilfredo A. Matamoros

et al.

Zoological Journal of the Linnean Society, Journal Year: 2024, Volume and Issue: 202(2)

Published: Oct. 1, 2024

Abstract We analysed phylogenetic relationships within a major clade of Cyprinodontiformes (Teleostei) that includes five families North American killifishes. used DNA sequences from genes for 130 species, with four fossil calibrations and three secondary calibrations, to generate time-calibrated phylogeny. estimated diversification rates, ancestral areas, habitats each node. Findings were interpreted detailed biogeographical synthesis. The results indicate the arose in Eocene along Gulf México coast. speciation rate was uniform through time, except acceleration Cyprinodontidae after ~10.9 Mya. In other families, neither viviparity nor marine-to-freshwater transition associated accelerated speciation. Sea-level fluctuations might have created pump by stimulating cycles dispersal vicariance Diversification also included many cases inland immigration coastal ancestors. For upland lineages, ancient river drainages accord lineage distributions, including enigmatic disjunctions Goodeidae Fundulus. uplands occurred via barrier displacement alluvial or tectonically active landscapes. Killifishes display high environmental tolerance persist harsh, peripheral environments unsuitable most fishes. Hence, combination antiquity, adaptability, dynamic geography, persistence can explain living diversity New World

Language: Английский

Citations

3
Hybridization alters the shape of the genotypic fitness landscape, increasing access to novel fitness peaks during adaptive radiation DOI Creative Commons
Austin H. Patton, Emilie J. Richards, Katelyn J. Gould

et al.

eLife, Journal Year: 2022, Volume and Issue: 11

Published: May 26, 2022

Estimating the complex relationship between fitness and genotype or phenotype (i.e. adaptive landscape) is one of central goals evolutionary biology. However, walks connecting genotypes to organismal fitness, speciation, novel ecological niches are still poorly understood processes for surmounting valleys remain controversial. One outstanding system addressing these connections a recent radiation ecologically morphologically pupfishes (a generalist, molluscivore, scale-eater) endemic San Salvador Island, Bahamas. We leveraged whole-genome sequencing 139 hybrids from two independent field experiments identify genomic basis estimate genotypic networks, measure accessibility on landscape. identified 132 single nucleotide polymorphisms (SNPs) that were significantly associated with in enclosures. Six out 13 regions most strongly contained differentially expressed genes fixed SNPs trophic specialists; gene ( mettl21e ) was also misexpressed lab-reared hybrids, suggesting potential intrinsic genetic incompatibility. then constructed networks alleles show scale-eating specialists isolated three species networks. Intriguingly, introgressed de novo variants reduced landscape ruggedness as compared standing variation, increasing paths generalist specialists. Our results suggest introgression mutations alter shape landscape, providing key circumventing triggering evolution novelty during radiation.

Language: Английский

Citations

16
Whole-genome resequencing and bisulfite sequencing provide new insights into the feeding habit domestication in mandarin fish (Siniperca chuatsi) DOI Creative Commons
Ling Li, Shan He,

Ming-Hui Lin

et al.

Frontiers in Genetics, Journal Year: 2023, Volume and Issue: 13

Published: Jan. 12, 2023

Mandarin fish (Siniperca chuatsi) is one of the most economically important in China. However, it has peculiar feeding habit that feeds solely on live prey since first-feeding, while refuses dead or artificial diets. After specific training procedure, partial individuals could accept and The genetic basis individual difference diet still unknown. In present study, resequencing was performed between 10 which be domesticated to diets not. Through selective sweep analysis based heterozygosity (Hp) population differentiation coefficient (Fst), 57 candidate windows were identified as putative selected regions for domestication mandarin fish, involved 149 genes. These genes related memory, vision olfaction function, potential targets molecular marker assistant breeding trait. Beside DNA sequence, we also explored role methylation fish. Whole-genome bisulfite sequencing those 5,976 differentially methylated identified, referring 3,522 genes, such cAMP signaling pathway. changes these might contribute adaption conclusion, whole genome, providing new insights into from And utilization

Language: Английский

Citations

8
On the evolution of trophic position DOI Creative Commons
Marvin Moosmann, Maria Cuenca Cambronero, Stephen P. De Lisle

et al.

Ecology Letters, Journal Year: 2021, Volume and Issue: 24(12), P. 2549 - 2562

Published: Sept. 22, 2021

The trophic structure of food webs is primarily determined by the variation in position among species and individuals. Temporal dynamics web are central to our understanding energy nutrient fluxes changing environments, but little known about how evolutionary processes shape natural populations. We propose that position, whose expression depends on both environmental genetic determinants diet individual consumers, a quantitative trait can evolve via selection. Such evolution occur either when correlated with other heritable morphological behavioural traits under selection, or target which possible if fitness effects prey items heterogeneously distributed along chains. Recognising as an evolving trait, context, provides important conceptual link between foraging theory dynamics, useful starting point for integration ecological studies position.

Language: Английский

Citations

18
Developmental tinkering of gene regulation facilitated super rapid adaptive radiation DOI Creative Commons
Anna Duenser, Pooja Singh, Ehsan Pashay Ahi

et al.

bioRxiv (Cold Spring Harbor Laboratory), Journal Year: 2024, Volume and Issue: unknown

Published: Jan. 27, 2024

Abstract Developmental shifts in gene regulation underlying key innovations remain largely uncharacterized over short evolutionary timescales. Here, we investigate the regulatory landscape of trophic fastest vertebrate adaptive radiation: cichlid fishes from Lake Victoria. By analyzing whole-transcriptomes oral and pharyngeal jaws two life stages five species adapted to divergent niches, find that both isoform expression are developmentally dynamic. Expression signatures most similar across at early stage then diverge into species-specific developmental programs adults. However, even stage, herbivory is distinct those carnivores, a pattern not observed for jaws. We further show differentially expressed spliced genes between herbivorous carnivorous regulate different pathways, particularly Interestingly, splicing-mediated exonization craniofacial development gene, kaznb, may have contributed evolution Victoria cichlids. Overall, our results contribute understanding how ontogenetic can facilitate rapid evolution.

Language: Английский

Citations

2