Journal of Heredity最新文献_第7页

A pseudochromosomal reference genome of the golden jackal, Canis aureus. 金色豺的假染色体参考基因组。

IF 2.2 2区生物学

Journal of Heredity Pub Date : 2026-07-02 DOI: 10.1093/jhered/esag021

Sven Winter, René Meißner, Stefan Prost, Carola Greve, Charlotte Gerheim, Marine Arakelyan, Sargis A Aghayan, Astghik Ghazaryan, Jennifer Hatlauf, Pamela A Burger

{"title":"A pseudochromosomal reference genome of the golden jackal, Canis aureus.","authors":"Sven Winter, René Meißner, Stefan Prost, Carola Greve, Charlotte Gerheim, Marine Arakelyan, Sargis A Aghayan, Astghik Ghazaryan, Jennifer Hatlauf, Pamela A Burger","doi":"10.1093/jhered/esag021","DOIUrl":"10.1093/jhered/esag021","url":null,"abstract":"The golden jackal (Canis aureus) is rapidly expanding its range in Europe, driven by climate and habitat changes, human influence, and changes in competition with wolves. Its ecological flexibility enables it to thrive in various habitats, including urban areas, raising concerns about its potential role in spreading zoonotic diseases. Jackals may act as reservoirs for pathogens such as Lyme disease and babesiosis, affecting wildlife, humans, and pets. Their close genetic relationship with domestic dogs also increases the risk of hybridization and host-jumping, complicating disease dynamics. To better understand their dispersal ability and host-pathogen dynamics, we present the first pseudochromosomal genome assembly of the golden jackal, generated using PacBio HiFi sequencing and reference-based scaffolding. The final assembly has a total length of 2.53 Gb in 325 scaffolds, with 98.41% of the sequence anchored to the expected 38+XY chromosomes. The assembly shows high contiguity, with scaffold and contig N50 values of 68.03 and 56.64 Mb, respectively. Annotation revealed 20,620 protein-coding genes, and repetitive elements account for 40.58% of the total assembly. This highly contiguous reference genome provides an essential resource for studying the genetic basis of the golden jackal's adaptation, ecological interactions, and potential as a zoonotic reservoir. It also supports efforts to monitor population expansion and its effects on ecosystems. By advancing our understanding of golden jackal genetics, this work enables future research on evolution, host-pathogen dynamics, and the broader consequences of wildlife dispersal in a rapidly changing environment.","PeriodicalId":54811,"journal":{"name":"Journal of Heredity","volume":" ","pages":"901-907"},"PeriodicalIF":2.2,"publicationDate":"2026-07-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC13326417/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147367222","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Chromosome-level reference genome of a foundational California native legume, Acmispon strigosus. 加利福尼亚原生豆科植物Acmispon strigosus的染色体水平参考基因组。

IF 2.2 2区生物学

Journal of Heredity Pub Date : 2026-07-02 DOI: 10.1093/jhered/esag007

Lorena Torres Martínez, Merly Escalona, Erin Toffelmier, Courtney Miller, Ruta Sahasrahbudhe, Mohan P A Marimuthu, Oanh Nguyen, Noravit Chumchim, Eric Beraut, Samuel Sacco, William Seligmann, Colin W Fairbairn, Robert D Cooper, H Bradley Shaffer, Jessica Purcell, Joel L Sachs

{"title":"Chromosome-level reference genome of a foundational California native legume, Acmispon strigosus.","authors":"Lorena Torres Martínez, Merly Escalona, Erin Toffelmier, Courtney Miller, Ruta Sahasrahbudhe, Mohan P A Marimuthu, Oanh Nguyen, Noravit Chumchim, Eric Beraut, Samuel Sacco, William Seligmann, Colin W Fairbairn, Robert D Cooper, H Bradley Shaffer, Jessica Purcell, Joel L Sachs","doi":"10.1093/jhered/esag007","DOIUrl":"10.1093/jhered/esag007","url":null,"abstract":"Acmispon is a legume genus that has diversified within the California Floristic Province. Acmispon species live in a variety of habitats, including coastal sage scrub, deserts, grasslands, and woodlands, and form symbiotic associations with nitrogen-fixing bacteria. Here, we report the first chromosome-level assembly of Acmispon strigosus (strigose bird's-foot trefoil or strigose lotus) as part of the California Conservation Genomics Project. Consistent with the reference genome pipelines of the California Conservation Genomics Project, we used Pacific Biosciences HiFi long reads and Hi-C chromatin-proximity sequencing technology to produce a de novo assembled genome. The assembly is 519 Mb in length, with a contig N50 of 22.97 Mb, scaffolded into seven pseudochromosomes. Using the NCBI EGAPx pipeline, we annotated a total of 21,347 genes resulting in a protein Benchmarking Universal Single-Copy Orthologs (BUSCO) completeness score of 91.5%. This is the first genome assembled for Acmispon and among the first genomic resources available for a native California legume. The assembly BUSCO completeness score of 94.8% makes it one of the most complete genomes for the tribe Loteae (Fabaceae). Generating whole-genome sequences will contribute to our general understanding of nitrogen-fixing legume's adaptations to diverse soil and environmental conditions, interactions with nitrogen fixing Bradyrhizobium and Mesorhizobium symbionts, and the degrading effects of pollution-induced nitrogen deposition on the legume-rhizobium symbiosis in California. These data will also help to reconstruct phylogenetic relationships among Acmispon spp., which remain unresolved.","PeriodicalId":54811,"journal":{"name":"Journal of Heredity","volume":" ","pages":"935-944"},"PeriodicalIF":2.2,"publicationDate":"2026-07-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC13326405/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146088277","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

A chromosome-level genome assembly for the beach-spawning California grunion, Leuresthes tenuis. 加利福尼亚海滩产卵格伦鱼染色体水平的基因组组装。

IF 2.2 2区生物学

Journal of Heredity Pub Date : 2026-07-02 DOI: 10.1093/jhered/esag012

Mira Abrecht, Karen L M Martin, Hayden P Speck, Merly Escalona, Ruta Sahasrabudhe, Mohan P A Marimuthu, Oanh Nguyen, Noravit Chumchim, Eric Beraut, Samuel Sacco, William Seligmann, Colin W Fairbairn, Courtney Miller, Elizabeth Heath-Heckman, Erin Toffelmier, H Bradley Shaffer, David K Jacobs

{"title":"A chromosome-level genome assembly for the beach-spawning California grunion, Leuresthes tenuis.","authors":"Mira Abrecht, Karen L M Martin, Hayden P Speck, Merly Escalona, Ruta Sahasrabudhe, Mohan P A Marimuthu, Oanh Nguyen, Noravit Chumchim, Eric Beraut, Samuel Sacco, William Seligmann, Colin W Fairbairn, Courtney Miller, Elizabeth Heath-Heckman, Erin Toffelmier, H Bradley Shaffer, David K Jacobs","doi":"10.1093/jhered/esag012","DOIUrl":"10.1093/jhered/esag012","url":null,"abstract":"We generated the first chromosome-level genome assembly for California grunion, Leuresthes tenuis, using PacBio HiFi long reads and Omni-C chromatin-proximity sequencing, yielding a 0.917 Gb genome with a scaffold N50 of 35 Mb and a BUSCO completeness score of 99.37. This beach-spawning marine silverside is the target of a unique recreational hand-grab fishery during its nocturnal spawning runs. Regulation of this fishery, initiated in 1927, remained unchanged from 1949 to 2022, when recent data suggesting a stock decrease led California Department of Fish and Wildlife to reduce the fishing season length. California grunion are endemic to the coast of California and northern Baja California, but within the last two decades the northern limit of spawning has expanded roughly 470 km from Point Conception to north of San Francisco Bay. This genome will facilitate studies addressing the temporal and spatial genetic stock structure, and recent range expansion, of this unique charismatic native species and will also allow assessment of genetic responses to present and future environmental challenges such as changing temperature, and pollution as well as the impacts of harvest and effects of management.","PeriodicalId":54811,"journal":{"name":"Journal of Heredity","volume":" ","pages":"856-867"},"PeriodicalIF":2.2,"publicationDate":"2026-07-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC13326419/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146108492","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Chromosomal fusions and evolutionary forces: Exploring the neo-sex chromosome system of Anolis distichus. 染色体融合和进化的力量：探索洋油葵的新性染色体系统。

IF 2.2 2区生物学

Journal of Heredity Pub Date : 2026-07-02 DOI: 10.1093/jhered/esaf108

Cleo H Falvey, Pietro de Mello, Jody M Taft, Alyssa A Vanerelli, Paul M Hime, Alana M Alexander, Richard E Glor, Anthony J Geneva

{"title":"Chromosomal fusions and evolutionary forces: Exploring the neo-sex chromosome system of Anolis distichus.","authors":"Cleo H Falvey, Pietro de Mello, Jody M Taft, Alyssa A Vanerelli, Paul M Hime, Alana M Alexander, Richard E Glor, Anthony J Geneva","doi":"10.1093/jhered/esaf108","DOIUrl":"10.1093/jhered/esaf108","url":null,"abstract":"The evolutionary dynamics of sex chromosomes differ from those of autosomes due to their unique patterns of inheritance and regions of hemizygosity in non-recombining areas. However, the study of sex chromosomes and sex-linked gene evolution has been limited by the rarity of truly novel sex chromosome complements in model systems. Recent advances in next-generation sequencing have enabled the identification of neo-sex chromosomes, created by the fission or fusion of autosomes with sex chromosomes, providing a new avenue to investigate the dynamics of sex chromosome evolution. Squamate reptiles, particularly Anolis lizards, are an excellent system for studying the consequences of sex-linkage due to their frequent sex chromosome-autosome fusions. The Hispaniolan Bark anole, Anolis distichus, has experienced two sex chromosome and autosome fusions that led to a multiple sex chromosome system (X1X2Y). We present a high-quality whole-genome assembly and annotation of a male A. distichus (X1X2Y), enabling a detailed analysis of all three of its neo-sex chromosomes. We identified the AnoDisX1, AnoDisX2, and AnoDisY chromosomes from assembly scaffolds using an integrative approach, and estimated their degeneration and selection strength. Our results support long-held theories of differential evolutionary pressures on sex chromosomes, such as the Fast X effect and Y degeneration. Additionally, we observed that chromosome 12 has become sex-linked in two different Anolis species, suggesting that some autosomes may be more likely to become sex-linked. Altogether, our genome adds to the diversity of available taxa sequenced and enables novel comparative analyses in a variety of fields, including speciation, chromosomal synteny, and sex chromosome evolution.","PeriodicalId":54811,"journal":{"name":"Journal of Heredity","volume":" ","pages":"672-687"},"PeriodicalIF":2.2,"publicationDate":"2026-07-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145892648","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Environmental drivers of genetic diversity and connectivity in a mountain ungulate across the European and Dinaric Alps. 跨欧洲和第纳尔阿尔卑斯山脉有蹄类动物遗传多样性和连通性的环境驱动因素。

IF 2.2 2区生物学

Journal of Heredity Pub Date : 2026-07-02 DOI: 10.1093/jhered/esag025

Julie Roques, Flurin Leugger, Elena Buzan, Luca Corlatti, Barbara Crestanello, Mathieu Garel, Heidi Christine Hauffe, Barbora Rolečková, Nikica Šprem, Loïc Pellissier, Glenn Yannic

{"title":"Environmental drivers of genetic diversity and connectivity in a mountain ungulate across the European and Dinaric Alps.","authors":"Julie Roques, Flurin Leugger, Elena Buzan, Luca Corlatti, Barbara Crestanello, Mathieu Garel, Heidi Christine Hauffe, Barbora Rolečková, Nikica Šprem, Loïc Pellissier, Glenn Yannic","doi":"10.1093/jhered/esag025","DOIUrl":"10.1093/jhered/esag025","url":null,"abstract":"Global environmental change is reshaping biodiversity by altering species connectivity, genetic diversity, and long-term viability. A key challenge is to disentangle how historical, environmental, and anthropogenic factors jointly shape contemporary genetic patterns. Here, we combine population genomics with landscape ecology tools to investigate the drivers of levels of genetic diversity and patterns of population genetic structure using more than 20 k Single Nucleotide Polymorphisms (SNPs) in the Northern chamois (Rupicapra rupicapra), a wide-ranging Alpine ungulate. Based on 465 individuals sampled across the European and Dinaric Alps as well as the Tatra Mountains, we revealed a pronounced hierarchical genetic structure, with clusters showing marked geographic variation in genetic diversity across the species range. Our results show that current genetic diversity largely reflects the genetic legacy of past climatic conditions, with areas of long-term stability acting as reservoirs of genetic variation. At the same time, large Alpine rivers emerge as strong barriers to gene flow, emphasizing the powerful role of natural landscape features in shaping genetic structure. In contrast, recent anthropogenic infrastructures exerted limited detectable influence, suggesting that contemporary patterns are still predominantly driven by natural processes of population differentiation. By explicitly quantifying the relative contributions of long-term climatic stability and contemporary landscape features to genetic diversity and connectivity, this study demonstrates that historical processes outweigh recent anthropogenic fragmentation in shaping current genetic patterns in this mountain ungulate.","PeriodicalId":54811,"journal":{"name":"Journal of Heredity","volume":" ","pages":"792-808"},"PeriodicalIF":2.2,"publicationDate":"2026-07-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147500756","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Embracing the power of genomics to inform evolutionary significant units. 拥抱基因组学的力量，为进化的重要单位提供信息。

IF 2.2 2区生物学

Journal of Heredity Pub Date : 2026-07-02 DOI: 10.1093/jhered/esag014

Jayna C Bergman, Rebecca S Taylor, Micheline Manseau

{"title":"Embracing the power of genomics to inform evolutionary significant units.","authors":"Jayna C Bergman, Rebecca S Taylor, Micheline Manseau","doi":"10.1093/jhered/esag014","DOIUrl":"10.1093/jhered/esag014","url":null,"abstract":"Appropriate identification of evolutionary significant units (ESUs) is essential for effective conservation planning. Genomic data has emerged as a key tool to inform ESU decisions, yet it remains unclear how genomic data are being used in practice to identify the number of ESUs. To address this, we conducted a systematic literature review and found that genomic data are increasingly being used to suggest numbers of ESUs globally across plant and animal taxa. However, our review revealed inconsistencies in how ESUs are defined, with many studies not providing a definition. We also found inconsistencies in the methods used to analyze genomic data, highlighting the need for greater standardization to ensure studies adequately address both the discreteness and evolutionary significant components of ESUs. For example, separation on a principal component analysis or a high Fst cannot ensure evolutionary significance as they may be due to recent processes such as habitat fragmentation. Adaptive loci, a key advantage of genomic data, need to be interpreted with caution and simply identifying these loci may lead to inflated ESU estimates. Overall, we found that 68% of studies suggested an increase in the number of ESUs, and that the amount of gene flow detected did not appear to influence this conclusion. We provide clear definitions of the two key components of ESUs and specify which analyses can be used to assess each, as well as provide recommendations for future studies aiming to identify ESUs with genomic data.","PeriodicalId":54811,"journal":{"name":"Journal of Heredity","volume":" ","pages":"623-636"},"PeriodicalIF":2.2,"publicationDate":"2026-07-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC13326409/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146121241","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Unbiased comparison of the number of segregating sites across unequal sample sizes. 对不同样本量的隔离点数目进行无偏比较。

IF 2.2 2区生物学

Journal of Heredity Pub Date : 2026-07-02 DOI: 10.1093/jhered/esag005

William Hemstrom, Mark R Christie

{"title":"Unbiased comparison of the number of segregating sites across unequal sample sizes.","authors":"William Hemstrom, Mark R Christie","doi":"10.1093/jhered/esag005","DOIUrl":"10.1093/jhered/esag005","url":null,"abstract":"Estimators for the numbers of polymorphic loci or alleles, such as private allele counts or allelic richness, are not as commonly used or well developed for single nucleotide polymorphism (SNP) data as are genetic estimators which rely on direct measurements of allele frequencies (such as expected heterozygosity, nucleotide diversity, and Tajima's θ). The number of segregating sites (S), the number of nucleotide sites that have more than one allele across the genome (e.g. SNPs), is one such estimator which does not rely on estimates of allele frequencies. S can provide informative estimates of genetic diversity across multiple scales, from genes to chromosomes to entire genomes, and is particularly informative when used in conjunction with allele frequency dependent estimators such as expected heterozygosity. However, segregating site counts are rarely adjusted to correct for unequal sample sizes or differences in missing data among populations or sample groups, and when they are, they typically fail to account for deviations from Hardy-Weinberg Proportions (HWP). Here, we introduce an unbiased estimator for the number of segregating sites expected in a sample group following rarefaction (S') and we use simulated data sets to illustrate that S' allows for accurate comparisons of the number of segregating sites among multiple sample groups with varied sample sizes and deviations from HWP. Lastly, by re-analyzing two existing empirical datasets which calculated S we show that S' produces different and less variable rank-order genetic diversity estimates than either S or Watterson's θ, which may have potential impacts on downstream biological inference.","PeriodicalId":54811,"journal":{"name":"Journal of Heredity","volume":" ","pages":"637-646"},"PeriodicalIF":2.2,"publicationDate":"2026-07-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146020846","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

A macrogenetic analysis of isolation mechanisms shaping genetic divergence in mammals. 哺乳动物遗传分化形成机制的宏观遗传学分析。

IF 2.2 2区生物学

Journal of Heredity Pub Date : 2026-07-02 DOI: 10.1093/jhered/esag003

Daniel A Hancock, Patrick Meirmans

{"title":"A macrogenetic analysis of isolation mechanisms shaping genetic divergence in mammals.","authors":"Daniel A Hancock, Patrick Meirmans","doi":"10.1093/jhered/esag003","DOIUrl":"10.1093/jhered/esag003","url":null,"abstract":"Understanding the processes that shape spatial genetic differentiation is essential for understanding how populations adapt to environmental change. By evaluating the influence of these processes, we can gain insights into evolutionary dynamics and the potential for species to respond to shifting landscapes. Three well-accepted processes that create spatial patterns in genetic variation are isolation-by-distance (IBD), where individuals are more genetically similar the closer they are geographically; isolation-by-environment (IBE), where gene flow is reduced due to selection against migrants in unsuitable ecological conditions; and isolation-by-resistance (IBR), where landscape features limit dispersal. We conducted a macrogenetic meta-analysis of single nucleotide polymorphism data to identify patterns shaping spatial genetic differentiation in 40 mammalian datasets globally. For each species, we built a species-distribution model and combined it with the global Human Footprint layer to create a composite resistance surface, revealing that habitat suitability and anthropogenic impact contribute roughly equally to resistance. Model selection tests found that IBR was the mechanism most frequently retained in the best models and had the highest variable importance. IBD and IBE alone had little effect but were often selected alongside IBR, suggesting that they may have secondary, context-dependent effects. However, the probability of finding IBD in the best model of divergence significantly increased as the number of populations sampled increased. Similarly, the probability of finding IBE increased with the spatial scale of the study. Our findings suggest that resistance is pervasive in shaping genetic variation in mammals worldwide, but that study design affects our ability to detect the presence of IBD and IBE.","PeriodicalId":54811,"journal":{"name":"Journal of Heredity","volume":" ","pages":"656-671"},"PeriodicalIF":2.2,"publicationDate":"2026-07-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC13326407/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146013311","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Chromosomal fusions shaped the genome of the greater hornwrack bryozoan (Flustra foliacea) (Linnaeus, 1758). 染色体融合形成了大角蚁苔藓虫（Flustra Foliacea）的基因组（林奈，1758）。

IF 2.2 2区生物学

Journal of Heredity Pub Date : 2026-07-02 DOI: 10.1093/jhered/esag013

Helle T Baalsrud, Ole K Tørresen, Bram Danneels, Giada Ferrari, Ave Tooming-Klunderud, Morten Skage, Spyridon Kollias, Mariann Árnyasi, Erling Svensen, Piotr Kuklinski, Kjetill S Jakobsen, Lee Hsiang Liow

{"title":"Chromosomal fusions shaped the genome of the greater hornwrack bryozoan (Flustra foliacea) (Linnaeus, 1758).","authors":"Helle T Baalsrud, Ole K Tørresen, Bram Danneels, Giada Ferrari, Ave Tooming-Klunderud, Morten Skage, Spyridon Kollias, Mariann Árnyasi, Erling Svensen, Piotr Kuklinski, Kjetill S Jakobsen, Lee Hsiang Liow","doi":"10.1093/jhered/esag013","DOIUrl":"10.1093/jhered/esag013","url":null,"abstract":"The phylum Bryozoa is an understudied, yet commonly occurring, globally distributed bilaterian metazoan organismal group. They have a colonial lifestyle and an evolutionary history that spans at least 480 million years but likely longer. Despite their contentious phylogenetic affinities among metazoans, disproportionately few genomic investigations have been performed thus far. Here, we describe the first chromosome-level genome assembly of an individual Flustra foliacea colony belonging to the order Cheilostomatida, collected in southern Norway. The haplotype-resolved assembly of F. foliacea contains two pseudo-haplotypes spanning 956 megabases and 880 megabases, respectively. Both assemblies are highly complete both in terms of scaffolding (>90% of sequences placed in eight autosomal chromosomal pseudomolecules), and gene content (BUSCO completeness scores >90%). We also present gene and repeat annotations of the two assemblies. A comparison of our newly sequenced F. foliacea with five previously published bryozoan genomes supports the hypothesis that the group has undergone extensive genome rearrangements. This includes multiple chromosomal fusions in F. foliacea since their split with other cheilostome bryozoans. These fusions were enriched with long terminal repeat retrotransposons, highlighting the complex interplay between genome organization and genomic repeats. Our study contributes to a deeper understanding of bryozoan genome evolution and the role of repeats in metazoan genome organization.","PeriodicalId":54811,"journal":{"name":"Journal of Heredity","volume":" ","pages":"750-760"},"PeriodicalIF":2.2,"publicationDate":"2026-07-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC13326412/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147286225","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Admixture and environment shape population genetic and phytochemical variation across a conifer hybrid zone (Juniperus, Cupressaceae). 混合和环境影响了针叶树杂交带（桧科，柏科）种群遗传和植物化学的变化。

IF 2.2 2区生物学

Journal of Heredity Pub Date : 2026-07-02 DOI: 10.1093/jhered/esag004

Kathryn A Uckele, Casey S Philbin, Lora A Richards, Lee A Dyer, Joshua P Jahner, Thomas L Parchman

{"title":"Admixture and environment shape population genetic and phytochemical variation across a conifer hybrid zone (Juniperus, Cupressaceae).","authors":"Kathryn A Uckele, Casey S Philbin, Lora A Richards, Lee A Dyer, Joshua P Jahner, Thomas L Parchman","doi":"10.1093/jhered/esag004","DOIUrl":"10.1093/jhered/esag004","url":null,"abstract":"Ancestry variation in hybrid zones can reflect the causes and genetic basis of reproductive isolation and result in novel phenotypic variation with the potential for extended ecological effects. Junipers (Juniperus) are foundational tree species in many semi-arid landscapes of western North America and often hybridize in zones of secondary contact. Such hybridization can be ecologically significant in foundational tree species, due to the strong genetic control and ecological consequences of plant chemistry. We generated genetic and phytochemical data to analyze hybridization among Juniperus grandis, Juniperus occidentalis, and Juniperus osteosperma in western Nevada and the impact of hybridization on plant chemistry. We used population genomic data [9,125 single-nucleotide polymorphisms (SNPs), 326 individuals, and 25 populations] to quantify patterns of genetic variation across populations and species and to characterize ancestry variation in hybrids. Although populations within species showed little genetic differentiation, the parental species formed distinct, monophyletic lineages with clear phenotypic and ecological differences. Hybrids occupied intermediate environments, contained ancestry from all three parents, and were mainly F1 or backcross hybrids. Phytochemical data (gas chromatography-mass spectrometry; 163 terpenoid compounds) were likewise analyzed to understand the consequences of hybridization for plant chemistry. The parental species and hybrids displayed distinct phytochemical profiles; hybrids had higher chemical diversity overall, and hybrid terpenoid concentrations were often intermediate or exceeded the range of all the parental species. Our results illustrate that geography and environment shape hybrid ancestry for a syngameon involving three Juniperus species, and that admixture generates novel phytochemical variation likely to have ecological consequences.","PeriodicalId":54811,"journal":{"name":"Journal of Heredity","volume":" ","pages":"699-717"},"PeriodicalIF":2.2,"publicationDate":"2026-07-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146055159","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0