Open research questions in Genetic diversity and population structure

What the literature leaves open

• As such, we emphasise the importance of collecting a sufficient number of samples to improve overall dataset quality, particularly in understudied regions, in our case Salonga, Ikela and TL2-W.

  Targeted chromosomal sequencing of wild bonobos identifies a genetically distinct subpopulation east of the Lomami river · 2026 · DOI

• The avian nest parasitic fly, Philornis downsi - first recorded in Darwin's finch nests in 1997 - causes high mortality in endemic land birds, yet its inter-island and sex-specific patterns of dispersal and genetic structure remain poorly understood.

  Asymmetric migration shapes genetic structure of the invasive avian vampire fly (Philornis downsi) across the Galapagos Islands. · 2026 · DOI

• Despite rapid adoption in conservation planning, it remains unclear how sensitive GO estimates are to key methodological choices, including SNP set composition, genotype-environment association (GEA) methods, and the specific GO metric used.

  Genomic offset is not predictive of recent demographic trends in Lycaeides butterflies · 2026 · DOI

• Background and AimsGroundwater-dependent ecosystems support disproportionate biodiversity in arid regions, yet the population genetics of spring-specialist plants remains poorly understood.

  Climate Gradients and Habitat Discontinuity Structure Genetic Variation in a Spring-Specialist Plant · 2026 · DOI

• Heterosis, or increased F1 fitness relative to the parental mean, has been proposed as a tool for investigating the role of drift on genetic variation in fitness, but its genetic basis and environmental dependence remain unclear in natural populations.

  Environment-dependent and often antagonistic effects of dominance and epistasis on heterosis in crosses between natural populations · 2026 · DOI

• Along with the recent developments in analytical approaches, we hope that our work, although limited to the Korean east coast region, can help improve the study of plant mainland‑island phylogeography, and of coastal species populations and lineages characterized by spatially discontinuous distributions.

  Patterns of genomic variation and population structure suggest the strong influence of allopatry between peninsular and island distributions of seashore spatulate aster on the Korean east coast region · 2026 · DOI

• The research suggested the use of genomic monitoring as a routine action in wildlife conservation initiatives in Pakistan to facilitate the early identification of genetic erosion and making appropriate decisions. Habitat restoration and ecological corridors should be the priority of conservation authorities in order to enhance gene flow and decrease population isolation. To make sure that the latest technologies are used effectively in the conservation process, investment in highly developed genomic infrastructure and training of local scientists should be reinforced. Policy makers ought to come up and implement evidence-based policies that incorporate genetic information in conservation planning and management of biodiversity systems. Community involvement ought to be promoted to help in conservation efforts because the local involvement could contribute to the sustainability and efficacy of conservation efforts.

  Integrating Genomic Tools with Conservation Biology: A Framework for Managing Genetic Erosion in Endangered Mammals of Pakistan · 2026 · DOI

• Further studies are needed to broaden the field of genomic research by incorporating more GRJNST, Volume: 04 - Issue 2 (2026) / ISSN P: 2790-7643 Article ID: 2070 https://doi.org/10.53762/grjnst.04.02.21 G. 2070 Page 23 endangered species and geographic area to give a more detailed knowledge of patterns of genetic erosion. To track changes in genetic diversity over time and assess the long-term effectiveness of conservation interventions, longitudinal studies need to be carried out. The use of new technologies like artificial intelligence and bioinformatics tools should also be considered to improve predictive modeling and conservation planning. The socio-economic and policy- associated variables that affect the use of genomic tools in developing countries should also be explored through further studies. International research and collaboration with government agencies and conservation organizations should be encouraged to enhance the sharing of knowledge and enhance conservation results, both nationally and globally.

  Integrating Genomic Tools with Conservation Biology: A Framework for Managing Genetic Erosion in Endangered Mammals of Pakistan · 2026 · DOI

• The three genetic groups identified for A. leucoclada and five/six groups for A. halimus are proposed for conservation selection, but specific breeding or germplasm management strategies for preserving genetically divergent genotypes under grazing pressure and drought are not detailed. Actionable conservation protocols linking the identified genetic groups to seed banking and restoration practices need development.

  Molecular Characterization of Jordanian Saltbush (Atriplex spp.) Accessions using Inter Simple Sequence Repeats Markers · 2026 · DOI

• Wild A. halimus populations in Jordan exist in sparse, fragmented salt marsh habitats but the current study did not quantify population size, fragment connectivity, or demographic processes affecting genetic diversity maintenance. Population-level surveys examining the relationship between habitat fragmentation and genetic diversity loss are required.

  Molecular Characterization of Jordanian Saltbush (Atriplex spp.) Accessions using Inter Simple Sequence Repeats Markers · 2026 · DOI

• The dominant nature of ISSR markers prevents discrimination between heterozygous and homozygous band-presence genotypes, resulting in observed heterozygosity consistently lower than expected heterozygosity in both A. leucoclada and A. halimus. Complementary codominant marker systems (e.g., microsatellites or SNPs) should be applied to obtain accurate heterozygosity estimates for these Atriplex species.

  Molecular Characterization of Jordanian Saltbush (Atriplex spp.) Accessions using Inter Simple Sequence Repeats Markers · 2026 · DOI

• The discrepancy between five genetic groups identified by STRUCTURE analysis and six major clades from dendrogram analysis in A. halimus remains unexplained beyond general reference to admixture. Detailed investigation of the genetic admixture patterns within each assigned group using higher-resolution genotyping is needed to clarify this inconsistency.

  Molecular Characterization of Jordanian Saltbush (Atriplex spp.) Accessions using Inter Simple Sequence Repeats Markers · 2026 · DOI

• The study lacks quantitative environmental and land-use variables (soil salinity, climate data, grazing history) integrated with the ISSR molecular marker data for Atriplex accessions. Direct associations between the observed genetic clustering patterns and specific ecological gradients cannot be established without this environmental context.

  Molecular Characterization of Jordanian Saltbush (Atriplex spp.) Accessions using Inter Simple Sequence Repeats Markers · 2026 · DOI

• The obtained results are generally consistent with modern view on the phylogeography of the species, but indicate the previously not investigated genetic heterogeneity of the Eastern clade, which occupies the entire Asian part of the range of the species and its European part to Northern and Eastern Europe.

  Genetic Diversity of the Field Vole Microtus agrestis (Arvicolinae, Rodentia) in the Central Part of Northern Eurasia according to the Cytochrome b Gene Data · 2024 · DOI

• It has also become an invaluable tool for discovering species in understudied groups, and genetic-based approaches are the foundation of international endeavors to generate a catalogue of DNA barcodes to illuminate biodiversity for all of life on the planet.

  Species Delimitation · 2022 · DOI

• 03:02P) has not been previously reported in any mixedancestry populations from Mexico but is commonly encountered in Native American human groups, which can reflect the impact of migration dynamics in the genetic conformation of the northern part of Mexico City, and the limitations of previous studies with regard to the genetic diversity of the analyzed groups.

  Genetic Differentiation in a Sample from Northern Mexico City Detected by HLA System Analysis: Impact in the Study of Population Immunogenetics · 2017 · DOI

• Such studies are an important component in the further work on the conservation of genetic diversity of sturgeon, which will provide an opportunity to carry out the state control over reproduction and preservation of valuable and endangered species under increased anthropogenic impact on natural populations.

  INTRASPECIFIC POLYMORPHISM OF MICROSATELLITE DNA OF RUSSIAN STURGEON (ACIPENSER GUELDENSTAEDTII, BRANDT) · 2016 · DOI

• De Pisapia et al. demonstrated that peri-saccadic eye movements can enhance visibility of briefly presented stimuli through spatial demasking, but this has only been tested with specific temporal parameters (12 ms test-mask interval, 20-30 ms pre-saccadic onset). The generalizability of this enhancement across different saccade amplitudes, saccade velocities, and stimulus contrast levels requires systematic parametric investigation.

  Evolutionary Biology: Speciation on Islands · 2010 · DOI

• The peri-saccadic displacement of visual stimuli (up to 10° mislocalization) and temporal compression effects have been documented, but the neural mechanisms distinguishing image motion from eye-movement-induced retinal motion remain incompletely characterized. The specific neural pathways in the superior colliculus and visual cortex responsible for this distinction during saccadic suppression need direct electrophysiological investigation.

  Evolutionary Biology: Speciation on Islands · 2010 · DOI

• While the General Dynamic Theory of oceanic island biogeography has been proposed, its predictive power for speciation patterns on islands at different ontogenetic stages (young volcanic islands versus older eroded islands) has not been systematically tested across multiple taxonomic groups. Comparative studies tracking speciation events on islands of known geological age are needed.

  Evolutionary Biology: Speciation on Islands · 2010 · DOI

• The relationship between speciation rate and island area has been proposed, but the mechanistic link between spatial scale, gene flow levels, and diversification rates in island taxa remains incompletely resolved. Specifically, empirical tests comparing diversification rates across islands of varying size while controlling for colonization history, habitat heterogeneity, and population genetic structure are needed.

  Evolutionary Biology: Speciation on Islands · 2010 · DOI

• Coyne and Price (2000) reported little evidence for sympatric speciation in island birds, but the mechanisms preventing sympatric speciation on islands versus those facilitating allopatric speciation across island archipelagos remain uncharacterized. Future work should directly compare gene flow patterns, reproductive isolation mechanisms, and ecological niche divergence between sympatric and allopatric island bird populations to determine what specific barriers prevent sympatric speciation.

  Evolutionary Biology: Speciation on Islands · 2010 · DOI

• Cross-Species Applicability of Microsatellite Markers for Investigation of Sea Ducks (Mergini) Genetic Differentiation Genetic studies of waterfowl have provided insufficient information on the evolutionary history of the sea duck tribe (Mergini, Anseriformes), as highly variable molecular markers have not been identified.

  Cross-Species Applicability of Microsatellite Markers for Investigation of Sea Ducks (Mergini) Genetic Differentiation · 2008 · DOI

• Kelly notes that although land is scarce in both these societies, Enga patiilineages which allocate land are, because of their si^e, particularly susceptible to imbalance due to demographic causes; people are redeployed over the available land primarily through loans within the clan, as well as by warfare between clans in the past.

  Agnatic taxonomies and stochastic variation · 1971 · DOI

• Assisted sexual reproduction is one intervention proposed to enhance genetic diversity and support population recovery, yet its genetic outcomes remain poorly quantified.

  High relatedness in sexually produced restoration cohorts of the endangered elkhorn coral, Acropora palmata · 2026 · DOI

Most-cited papers in Genetic diversity and population structure

• Complexity of avian evolution revealed by family-level genomes · Nature · 2024 · 281 citations
• Genetic effects of anthropogenic habitat fragmentation on remnant animal and plant populations: a meta‐analysis · Ecosphere · 2018 · 221 citations
• The role of glacial cycles in promoting genetic diversity in the Neotropics: the case of cloud forests during the Last Glacial Maximum · Ecology and Evolution · 2013 · 178 citations
• Plant Genetic Diversity Studies: Insights from DNA Marker Analyses · International Journal of Plant Biology · 2024 · 93 citations
• Toward a Mechanistic Understanding of Linguistic Diversity · BioScience · 2013 · 73 citations
• Waste not, want not: Microsatellites remain an economical and informative technology for conservation genetics · Ecology and Evolution · 2021 · 70 citations
• Candidate‐species delimitation in <i>Desmognathus</i> salamanders reveals gene flow across lineage boundaries, confounding phylogenetic estimation and clarifying hybrid zones · Ecology and Evolution · 2022 · 43 citations
• Closer to the rear edge: ecology and genetic diversity down the core‐edge gradient of a marine macroalga · Ecosphere · 2015 · 40 citations
• Conservation genetics · Current Biology · 2021 · 36 citations
• High functional diversity in deep‐sea fish communities and increasing intraspecific trait variation with increasing latitude · Ecology and Evolution · 2021 · 33 citations

Most recent work

• Gap genes are involved in inviability in hybrids between Drosophila melanogaster and D. santomea · bioRxiv · 2026
• Increased rates of hybridization in swordtails are associated with water pollution · bioRxiv · 2026
• First high-density linkage map based on GBS derived genome wide SNP markers in Labeo catla (Hamilton, 1822) · Scientific Data · 2026
• Historically Small Population Size Limits Purging of Deleterious Mutations in a Conservation-Reliant Species, the Kirtlands Warbler · bioRxiv · 2026
• Environment-dependent and often antagonistic effects of dominance and epistasis on heterosis in crosses between natural populations · bioRxiv · 2026
• Ancient persistence and recurrent emergence of structural variants across divergent Atlantic salmon lineages · bioRxiv · 2026
• Genomic Assessment of Reintroduced African Wild Dogs Informs Conservation Translocations · Animal Conservation · 2026
• Repeated signatures of balancing selection in small and large populations of guppies (Poecilia reticulata). · Philosophical Transactions B · 2026
• A Pan-pangenome illuminates complex structural variation and selection in humans, chimpanzees, and bonobos · bioRxiv · 2026
• Detecting and quantifying rare sex in natural populations · bioRxiv · 2026

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