Nizar J Haddad, Mohamad A Al-Araishi, Sami Awabdeh, Rajesh Patidar, Ryan Bell, Khaleel Jawasreh, Heba Alhurani, Leqaa J Alharbed, Rawad Sweidan, Eman N Al-Anaswah, Mohammad Brake, Monther T Sadder, Omar A Blanco, Loai Sbeih, Mohamed Uduman, Saquib A Lakhani, Mustafa K Khokha, Ahmed Weir
{"title":"The Alia Camel of Jordan: a genetically distinct dromedary breed.","authors":"Nizar J Haddad, Mohamad A Al-Araishi, Sami Awabdeh, Rajesh Patidar, Ryan Bell, Khaleel Jawasreh, Heba Alhurani, Leqaa J Alharbed, Rawad Sweidan, Eman N Al-Anaswah, Mohammad Brake, Monther T Sadder, Omar A Blanco, Loai Sbeih, Mohamed Uduman, Saquib A Lakhani, Mustafa K Khokha, Ahmed Weir","doi":"10.1093/jhered/esae076","DOIUrl":"10.1093/jhered/esae076","url":null,"abstract":"<p><p>The Dromedary camel has a remarkable history amongst cultures across Asia and northern Africa, serving multiple purposes ranging from providing milk, textiles, racing, and acting as pack animals. Recent genetic studies have revealed that many dromedaries are genetically homogenous, indicating that they do not represent different breeds, advocating for camel \"type\" over camel \"breed.\" In this study, we leveraged whole genome sequencing (WGS) to sequence 15 Jordanian Alia camels for the first time, alongside 9 Jordanian mixed camels from diverse locations within the country. Additionally, we analyzed 48 publicly available whole genomes of dromedary camels from the Arabian Peninsula for comparison. We demonstrate that the Alia camel is a distinct breed of camel, carefully bred in Jordan for racing and milk production. Compared with other dromedary camels, the Alia is genetically distinct and a unique breed that should be conserved. Our data further suggest that WGS of different camel populations may identify additional breeds and inform approaches to optimize traits and preserve genetic diversity.</p>","PeriodicalId":54811,"journal":{"name":"Journal of Heredity","volume":"116 4","pages":"435-440"},"PeriodicalIF":2.5,"publicationDate":"2025-07-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144676625","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}
Erin R Voss, Merly Escalona, Oanh Nguyen, Mohan P A Marimuthu, Noravit Chumchim, Colin W Fairbairn, William Seligmann, Eric Beraut, Christopher J Conroy, James L Patton, Rauri C K Bowie, Michael W Nachman
{"title":"A high-quality genome assembly for a desert-adapted rodent, Merriam's kangaroo rat (Dipodomys merriami).","authors":"Erin R Voss, Merly Escalona, Oanh Nguyen, Mohan P A Marimuthu, Noravit Chumchim, Colin W Fairbairn, William Seligmann, Eric Beraut, Christopher J Conroy, James L Patton, Rauri C K Bowie, Michael W Nachman","doi":"10.1093/jhered/esaf023","DOIUrl":"10.1093/jhered/esaf023","url":null,"abstract":"<p><p>Merriam's kangaroo rat (Dipodomys merriami) is a member of a unique family of primarily desert-adapted North American rodents (Heteromyidae). Of the 20 species in the genus, D. merriami is one of the most wide-ranging and ecologically flexible, inhabiting desert scrub, grassland, sagebrush steppe, and juniper-piñon woodland in the southwestern deserts of the United States and Mexico. We present a de novo reference genome for D. merriami generated from PacBio HiFi long-read and Omni-C chromatin proximity sequencing as a part of the California Conservation Genomics Project. The primary pseudo-haplotype assembly comprises 3,110 scaffolds, with a contig N50 of 8.6 Mb, scaffold N50 of 49.1 Mb, and a total length of 3.57 Gb. Further, a BUSCO completeness score of 97.8% suggests that the assembly is highly complete. This reference genome will serve as a resource for future studies of Dipodomys conservation genomics, desert adaptation, and phylogeography.</p>","PeriodicalId":54811,"journal":{"name":"Journal of Heredity","volume":" ","pages":"524-531"},"PeriodicalIF":3.0,"publicationDate":"2025-07-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12277566/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144052392","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}
Yan-Kai Su, Ming-Hua Xiu, Hao-Yan Yang, Cheng-Min Shi
{"title":"A chromosome-level genome assembly for the desert scorpion Mesobuthus przewalskii from Asian drylands.","authors":"Yan-Kai Su, Ming-Hua Xiu, Hao-Yan Yang, Cheng-Min Shi","doi":"10.1093/jhered/esae059","DOIUrl":"10.1093/jhered/esae059","url":null,"abstract":"<p><p>Scorpions are an ancient and charismatic group of arthropods with medical importance, but a high-quality reference genome for this group is still lacking. Here we perform whole-genome sequencing of Mesobuthus przewalskii, a desert scorpion endemic to the Taklimakan Desert. We combine PacBio HiFi sequencing and Hi-C chromosome conformation capturing to generate chromosomal-level, haplotype-resolved, and fully annotated genome assembly for this medically important scorpion. The assembly consists of two haplotypes (1,052.01 Mbp and 1,055.19 Mbp, respectively) reaching chromosome-level contiguity and >98% BUSCO (Benchmarking Universal Single-Copy Orthologs) completeness. Sequences were anchored in 13 chromosomes with a contig N50 of 34.44 Mbp and scaffold N50 of 81.43 Mbp. Several key genome features and the mitochondrial genome assembly were also provided. This genome represents the fifth but the most complete assembly for the order Scorpiones.</p>","PeriodicalId":54811,"journal":{"name":"Journal of Heredity","volume":" ","pages":"532-539"},"PeriodicalIF":3.0,"publicationDate":"2025-07-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142481270","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}
Natalie Payne, Desiree Andersen, Robert Davis, Cheryl Mollohan, Kerry Baldwin, Albert L LeCount, Melanie Culver
{"title":"Evidence of extensive home range sharing among mother-daughter bobcat pairs in the wildland-urban interface of the Tucson Mountains.","authors":"Natalie Payne, Desiree Andersen, Robert Davis, Cheryl Mollohan, Kerry Baldwin, Albert L LeCount, Melanie Culver","doi":"10.1093/jhered/esae072","DOIUrl":"10.1093/jhered/esae072","url":null,"abstract":"<p><p>Urbanization impacts the structure and viability of wildlife populations. Some habitat generalists, such as bobcats (Lynx rufus), maintain populations at the intersection of wild and urban habitats (wildland-urban interface), but the impacts of urbanization on bobcat social structure are not well understood. Although commonly thought to establish exclusive home ranges among females, instances of mother-daughter home range sharing have been documented. We combined Global Positioning System (GPS) localities with genomic relatedness inferences from double-digest restriction site associated DNA sequencing to investigate mother-daughter home range sharing in bobcats (n = 38) at the wildland-urban interface in the Tucson Mountains, Arizona, USA. We found the highest relatedness among females, which showed stronger isolation by distance than males and the population as a whole. Using mother-daughter relationships inferred from pedigree reconstruction, we found extensive mother-daughter home range sharing, compared with other females. Every mother identified as having at least one daughter, shared home ranges with one daughter, while other confirmed daughters established adjacent home ranges. Our results provide substantial support for the mother-daughter home range sharing hypothesis, as well as evidence of spatiotemporal overlap between mothers and daughters, adding to the body of research complicating the solitary felid paradigm. These results additionally challenge the notion of home range partitioning by prior-rights land tenure, suggesting a role of matrilineal land tenure in the home range establishment of daughters. Habitat fragmentation due to human population growth and urbanization thus has the potential to alter landscape genetic structure and social dynamics in bobcats.</p>","PeriodicalId":54811,"journal":{"name":"Journal of Heredity","volume":" ","pages":"408-421"},"PeriodicalIF":3.0,"publicationDate":"2025-07-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142830841","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}
Erin R Voss, Merly Escalona, Krzysztof M Kozak, William Seligmann, Colin W Fairbairn, Oanh Nguyen, Mohan P A Marimuthu, Chris J Conroy, James L Patton, Rauri C K Bowie, Michael W Nachman
{"title":"De novo genome assembly of a Geomyid rodent, Botta's pocket gopher (Thomomys bottae bottae).","authors":"Erin R Voss, Merly Escalona, Krzysztof M Kozak, William Seligmann, Colin W Fairbairn, Oanh Nguyen, Mohan P A Marimuthu, Chris J Conroy, James L Patton, Rauri C K Bowie, Michael W Nachman","doi":"10.1093/jhered/esae045","DOIUrl":"10.1093/jhered/esae045","url":null,"abstract":"<p><p>Botta's pocket gopher (Thomomys bottae) is a common and widespread subterranean rodent of the North American West. The species has been of great interest to evolutionary biologists due to the phenotypic diversity and unusual levels of variation in chromosome number and composition observed across its range. Here, we present a high-quality reference genome from a male T. b. bottae individual captured in the San Francisco Bay Area. The assembly is comprised of 2,792 scaffolds, with a scaffold N50 value of 23.6 Mb and a BUSCO completeness score of 91.0%. This genome helps fill a significant taxonomic sampling gap in rodent genome resources. With this reference genome, we envision new opportunities to investigate questions regarding the genomics of adaptation to the belowground niche. Further, we can begin to explore the impact of associated life history traits, such as limited dispersal and low population connectivity, on intraspecific genetic and phenotypic variation, genome evolution, speciation, and phylogenetic relationships across the Geomyoidea.</p>","PeriodicalId":54811,"journal":{"name":"Journal of Heredity","volume":" ","pages":"513-523"},"PeriodicalIF":3.0,"publicationDate":"2025-07-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12277567/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142074570","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}
Linjing Lan, Xin Zhang, Shanxiu Yang, Xiuguang Mao, Ji Dong
{"title":"Chromosome-level genome assembly of the king horseshoe bat (Rhinolophus rex) provides insights into its conservation status and chromosomal evolution of Rhinolophus.","authors":"Linjing Lan, Xin Zhang, Shanxiu Yang, Xiuguang Mao, Ji Dong","doi":"10.1093/jhered/esae077","DOIUrl":"10.1093/jhered/esae077","url":null,"abstract":"<p><p>A high-quality reference genome is quite valuable in assessing the conservation status of a rare species when adequate data from other sources are unavailable. Bats comprise almost a fifth of all mammals and contribute greatly to the ecosystem. However, due to the nocturnal and elusive habits, it is difficult to obtain the accurate census population size of a rare bat species and assess its conservation status. Here, we generate a chromosome-level genome assembly for the king horseshoe bat (Rhinolophus rex) and assess its conservation status by comparing the genome-wide summary statistics with other related species. The genome assembly size was 2.1 Gb (contig N50: 75.26 Mb) and 99.9% of the total sequences were anchored onto 30 autosomes, X and Y chromosomes. Despite lower genome-wide heterozygosity and recent inbreeding, R. rex did not exhibit a higher genetic load compared with the other two Rhinolophus species. Historical demography analysis revealed that R. rex maintained a long-term (~2 million years) stable population size (~150,000). In the future, whole-genome sequencing data from more individuals will be needed to comprehensively assess the conservation status at recent timescales. We also reconstructed the ancestral karyotype of Rhinolophus as 2n = 54 and found that Robertsonian fissions and fusions were the main mechanisms of chromosomal rearrangements in this genus. Overall, our study shows important implications of reference-quality genomes in both conservation genomics and comparative genomics.</p>","PeriodicalId":54811,"journal":{"name":"Journal of Heredity","volume":" ","pages":"499-512"},"PeriodicalIF":3.0,"publicationDate":"2025-07-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142830839","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}
Andrey Tomarovsky, Ruqayya Khan, Olga Dudchenko, Azamat Totikov, Natalia A Serdyukova, David Weisz, Nadejda V Vorobieva, Tatiana Bulyonkova, Alexei V Abramov, Wenhui Nie, Jinhuan Wang, Svetlana A Romanenko, Anastasiya A Proskuryakova, Nikolay Cherkasov, Malcolm A Ferguson-Smith, Fengtang Yang, Elena Balanovskaya, M Thomas P Gilbert, Alexander S Graphodatsky, Erez Lieberman Aiden, Roger Powell, Klaus-Peter Koepfli, Polina L Perelman, Sergei Kliver
{"title":"Chromosome-length genome assembly of the stone marten (Martes foina, Mustelidae): A new view on one of the cornerstones in carnivore cytogenetics.","authors":"Andrey Tomarovsky, Ruqayya Khan, Olga Dudchenko, Azamat Totikov, Natalia A Serdyukova, David Weisz, Nadejda V Vorobieva, Tatiana Bulyonkova, Alexei V Abramov, Wenhui Nie, Jinhuan Wang, Svetlana A Romanenko, Anastasiya A Proskuryakova, Nikolay Cherkasov, Malcolm A Ferguson-Smith, Fengtang Yang, Elena Balanovskaya, M Thomas P Gilbert, Alexander S Graphodatsky, Erez Lieberman Aiden, Roger Powell, Klaus-Peter Koepfli, Polina L Perelman, Sergei Kliver","doi":"10.1093/jhered/esaf001","DOIUrl":"10.1093/jhered/esaf001","url":null,"abstract":"<p><p>The stone marten (Martes foina) is an important species for cytogenetic studies in the order Carnivora. ZooFISH probes created from its chromosomes provided a strong and clean signal in chromosome painting experiments and were valuable for studying the evolution of carnivoran genome architecture. The research revealed that the stone marten chromosome set is similar to the presumed ancestral karyotype of the Carnivora, which added an additional value for the species. Using linked-read and Hi-C sequencing, we generated a chromosome-length genome assembly of a male stone marten (Gansu province, China) from a primary cell line. The stone marten assembly had a length of 2.42 Gbp, scaffold N50 of 144 Mbp, and a 96.2% BUSCO completeness score. We identified 19 chromosomal scaffolds (2n = 38) and assigned them chromosome ids based on chromosome painting data. Annotation identified 20,087 protein-coding gene models, of which 18,283 were assigned common names. Comparison of the stone marten assembly with the cat, dog, and human genomes revealed several small syntenic blocks absent on the published painting maps. Finally, we assessed the heterozygosity and its distribution over the chromosomes. The detected low heterozygosity level (0.4 hetSNPs/kbp) and the presence of long runs of homozygosity require further research and a new evaluation of the conservation status of the stone marten in China. Combined with available carnivoran genomes in large-scale synteny analysis, the stone marten genome will highlight new features and events in carnivoran evolution, hidden from cytogenetic approaches.</p>","PeriodicalId":54811,"journal":{"name":"Journal of Heredity","volume":" ","pages":"548-557"},"PeriodicalIF":3.0,"publicationDate":"2025-07-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143069192","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}
Veronica Z Radice, Johanna C Gijsbers, Silvia Vimercati, Daniel J Barshis
{"title":"First reference genomes for two mesophotic, reef-building coral species: Leptoseris cf. scabra and Montipora cf. grisea.","authors":"Veronica Z Radice, Johanna C Gijsbers, Silvia Vimercati, Daniel J Barshis","doi":"10.1093/jhered/esaf010","DOIUrl":"10.1093/jhered/esaf010","url":null,"abstract":"<p><p>Coral mortality is occurring worldwide at an alarming rate. Despite the immense and underestimated biodiversity of reef-building corals, very few genomes are available. Further, almost all genomic resources originate from shallow water corals even though photosynthetic, symbiotic corals occur at mesophotic depths deeper than 30 m and even >100 m. We present annotated, de novo genomes for two mesophotic, scleractinian (reef-building) corals Montipora cf. grisea and Leptoseris cf. scabra from American Sāmoa, the latter being the first genome for the widespread genus Leptoseris. We used PacBio continuous long reads and Omni-C data to assemble chromosome-level reference genomes. For Montipora cf. grisea, the final genome size was 1.3 Gb with a completeness level (BUSCO) of 99.9% and 97.2% against the eukaryotic and metazoan databases, respectively. The M. cf. grisea genome had a N50 of 50.2 Mb and the annotation predicted 41,981 genes. For Leptoseris cf. scabra, the final genome size was 794 Mb with a BUSCO of 99.2% and 96.1% against the eukaryotic and metazoan databases, respectively. The L. cf. scabra genome had a N50 of 45.2 Mb and 35,741 predicted genes. These genomes serve as critical references for the analysis of coral gene expression responses to climate change such as ocean warming (i.e., coral bleaching) and ocean acidification impacts. The genomes can be used to investigate the genetic diversity and adaptive divergence of shallow vs. mesophotic coral populations to understand reef resilience and guide conservation strategies.</p>","PeriodicalId":54811,"journal":{"name":"Journal of Heredity","volume":" ","pages":"488-498"},"PeriodicalIF":3.0,"publicationDate":"2025-07-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12277568/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143677419","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}
Terrence Sylvester, Richard Adams, Robert F Mitchell, Ann M Ray, Rongrong Shen, Na Ra Shin, Kasuni C Daundasekara, Duane D McKenna
{"title":"Insights into longhorn beetle (Cerambycidae) evolution from comparative analyses of the red-headed ash borer (Neoclytus acuminatus acuminatus) genome.","authors":"Terrence Sylvester, Richard Adams, Robert F Mitchell, Ann M Ray, Rongrong Shen, Na Ra Shin, Kasuni C Daundasekara, Duane D McKenna","doi":"10.1093/jhered/esaf016","DOIUrl":"10.1093/jhered/esaf016","url":null,"abstract":"<p><p>Neoclytus acuminatus acuminatus, the red-headed ash borer, is a wood-boring longhorn beetle (Cerambycidae: Cerambycinae) native to North America and introduced in Eurasia and South America. Its larvae develop in dying or recently dead hardwood trees, including ecologically and economically significant species of ash, hickory, and oak. We sequenced, assembled, and annotated the genome of a female N. acuminatus and compared it to the publicly available genomes of other cerambycid species. The 508 Mb N. acuminatus genome assembly spanned 20 contigs (19 nuclear + 1 mitochondrial), with an N50 of 52.59 Mb and largest contig of 61.20 Mb. A moderately high fraction of the genome (62.63%) comprised repetitive sequences, with nearly all (99.4%) expected single-copy orthologous genes (BUSCOs) present and fully assembled. We identified 2 contigs as fragments of the N. acuminatus sex chromosome. Genome annotation identified 12,899 genes, including 109 putative horizontally transferred loci. Synteny analysis identified well-conserved blocks of collinearity between the N. acuminatus genome and other Cerambycidae. The genome contains a similar number of genes encoding putative plant cell wall degrading enzymes as other Cerambycidae. The N. acuminatus genome provides new insights into genome evolution in the family Cerambycidae, known for its rich diversity of xylophagous species, and provides a new viewpoint from which to study the evolution and genomic basis of traits such as wood-feeding and olfaction in beetles and other insects.</p>","PeriodicalId":54811,"journal":{"name":"Journal of Heredity","volume":" ","pages":"558-567"},"PeriodicalIF":3.0,"publicationDate":"2025-07-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143694691","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}
Guilherme Mota Souza, Jhon Alex Dziechciarz Vidal, Ricardo Utsunomia, Geize Aparecida Deon, Edivaldo Herculano Correa de Oliveira, Raqueli Teresinha Franca, Fabio Porto-Foresti, Thomas Liehr, Fernando Henrique Santos de Souza, Rafael Kretschmer, Marcelo de Bello Cioffi
{"title":"Cytogenomic analysis in Seriemas (Cariamidae): Insights into an atypical avian karyotype.","authors":"Guilherme Mota Souza, Jhon Alex Dziechciarz Vidal, Ricardo Utsunomia, Geize Aparecida Deon, Edivaldo Herculano Correa de Oliveira, Raqueli Teresinha Franca, Fabio Porto-Foresti, Thomas Liehr, Fernando Henrique Santos de Souza, Rafael Kretschmer, Marcelo de Bello Cioffi","doi":"10.1093/jhered/esaf012","DOIUrl":"10.1093/jhered/esaf012","url":null,"abstract":"<p><p>Contrasting with most bird species that present an ancestral-like karyotype (with 2n = 80), the only extant Cariamidae birds, the Red-legged (Cariama cristata) and Black-legged (Chunga burmeisteri) Seriemas, have high 2n and atypically large Z chromosomes. This study combined cytogenetic, bioinformatic, and genomic analyses to examine the distinctive characteristics of an unusual bird karyotype, with a focus on repetitive elements and sex chromosomes. Whole-genome alignments and chromosomal painting with a Z-chromosome-specific probe were also performed against the emu (a species with an ancestral-like karyotype). The satellitomes of C. cristata and C. burmeisteri were composed of only four and 6 long satDNAs, respectively. These satDNAs showed similarity with other repetitive sequences, mostly transposable elements, and were mapped in the pericentromeric regions of several chromosome pairs. CcrSat02-1104 mostly covered the Z and W sex chromosomes, besides being spread throughout additional chromosomes. Interstitial telomeric sites were not detected, even in the Z chromosome, and none of the 16 microsatellites tested showed positive signals on the C. cristata chromosomes. The genome alignments showed that the karyotype evolution that occurred in C. cristata may have involved significant chromosomal reshuffling, particularly fissions. Notwithstanding certain internal inversions, the Z chromosome retained homology with that of the emu. However, repetitive sequences also accumulated on the Z chromosome, contributing to its enlargement relative to the pattern observed in ancestral avian groups.</p>","PeriodicalId":54811,"journal":{"name":"Journal of Heredity","volume":" ","pages":"441-452"},"PeriodicalIF":3.0,"publicationDate":"2025-07-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143626999","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}