gEVAL - a web-based browser for evaluating genome assemblies

The genome sequence of the Cow Parsley Leaf Beetle, Chrysolina oricalcia (O.F. Müller, 1776)

We present a genome assembly from an individual Cow Parsley Leaf Beetle Chrysolina oricalcia (the Cow Parsley Leaf Beetle; Arthropoda; Insecta; Coleoptera; Chrysomelidae). The genome sequence is 1,423.4 megabases in span. Most of the assembly is scaffolded into 22 chromosomal pseudomolecules, including the X sex chromosome. The mitochondrial genome has also been assembled and is 16.93 kilobases in length. Gene annotation of this assembly on Ensembl identified 35,990 protein coding genes.

The sensory shark: high-quality morphological, genomic and transcriptomic data for the small-spotted catshark Scyliorhinus canicula reveal the molecular bases of sensory organ evolution in jawed vertebrates

Cartilaginous fishes (chimaeras and elasmobranchs -sharks, skates and rays) hold a key phylogenetic position to explore the origin and diversifications of jawed vertebrates. Here, we report and integrate reference genomic, transcriptomic and morphological data in the small-spotted catshark Scyliorhinus canicula to shed light on the evolution of sensory organs. We first characterise general aspects of the catshark genome, confirming the high conservation of genome organisation across cartilaginous fishes, and investigate population genomic signatures. Taking advantage of a dense sampling of transcriptomic data, we also identify gene signatures for all major organs, including chondrichthyan specializations, and evaluate expression diversifications between paralogs within major gene families involved in sensory functions. Finally, we combine these data with 3D synchrotron imaging and in situ gene expression analyses to explore chondrichthyan-specific traits and more general evolutionary trends of sensory systems. This approach brings to light, among others, novel markers of the ampullae of Lorenzini electro-sensory cells, a duplication hotspot for crystallin genes conserved in jawed vertebrates, and a new metazoan clade of the Transient-receptor potential (TRP) family. These resources and results, obtained in an experimentally tractable chondrichthyan model, open new avenues to integrate multiomics analyses for the study of elasmobranchs and jawed vertebrates.

Genomic evidence reveals three W-autosome fusions in Heliconius butterflies

Sex chromosomes are evolutionarily labile in many animals and sometimes fuse with autosomes, creating so-called neo-sex chromosomes. Fusions between sex chromosomes and autosomes have been proposed to reduce sexual conflict and to promote adaptation and reproductive isolation among species. Recently, advances in genomics have fuelled the discovery of such fusions across the tree of life. Here, we discovered multiple fusions leading to neo-sex chromosomes in the sapho subclade of the classical adaptive radiation of Heliconius butterflies. Heliconius butterflies generally have 21 chromosomes with very high synteny. However, the five Heliconius species in the sapho subclade show large variation in chromosome number ranging from 21 to 60. We find that the W chromosome is fused with chromosome 4 in all of them. Two sister species pairs show subsequent fusions between the W and chromosomes 9 or 14, respectively. These fusions between autosomes and sex chromosomes make Heliconius butterflies an ideal system for studying the role of neo-sex chromosomes in adaptive radiations and the degeneration of sex chromosomes over time. Our findings emphasize the capability of short-read resequencing to detect genomic signatures of fusion events between sex chromosomes and autosomes even when sex chromosomes are not explicitly assembled.

The genome sequence of the nematode Caenorhabditis drosophilae (Rhabditida, Rhabditidae) (Kiontke, 1997)

We present a genome assembly of the free-living nematode Caenorhabditis drosophilae (Nematoda; Chromadorea; Rhabditida; Rhabditidae). The genome sequence is 51.3 megabases in span. Most of the assembly is scaffolded into six chromosomal pseudomolecules, including the X sex chromosome. The mitochondrial genome has also been assembled and is 15.15 kilobases in length.

The genome sequence of the Grey Sedge caddis fly, Odontocerum albicorne (Scopoli, 1769)

We present a genome assembly from an individual male Odontocerum albicorne (the Grey Sedge caddis fly; Arthropoda; Insecta; Trichoptera; Odontoceridae). The genome sequence is 1,287.3 megabases in span. Most of the assembly is scaffolded into 31 chromosomal pseudomolecules, including the Z sex chromosome. The mitochondrial genome has also been assembled and is 16.57 kilobases in length.

The genome sequence of the Oak Nycteoline moth, Nycteola revayana (Scopoli, 1772)

We present a genome assembly from an individual male Nycteola revayana (the Oak Nycteoline moth; Arthropoda; Insecta; Lepidoptera; Nolidae). The genome sequence is 621.0 megabases in span. Most of the assembly is scaffolded into 26 chromosomal pseudomolecules, including the Z sex chromosome. The mitochondrial genome has also been assembled and is 15.25 kilobases in length. Gene annotation of this assembly on Ensembl identified 19,235 protein-coding genes.

The genome sequence of the Brown Long-eared bat, Plecotus auritus (Linnaeus 1758)

We present a genome assembly from a female Plecotus auritus (Brown Long-eared bat; Chordata; Mammalia; Chiroptera; Vespertilionidae). The genome sequence is 2163.2 megabases in span. Most of the assembly is scaffolded into 16 chromosomal pseudomolecules, including the X sex chromosome. The mitochondrial genome has also been assembled and is 16.91 kilobases in length.

The genome sequences of the marine diatom Epithemia pelagica strain UHM3201 (Schvarcz, Stancheva & Steward, 2022) and its nitrogen-fixing, endosymbiotic cyanobacterium

We present the genome assembly of the pennate diatom Epithemia pelagica strain UHM3201 (Ochrophyta; Bacillariophyceae; Rhopalodiales; Rhopalodiaceae) and that of its cyanobacterial endosymbiont (Chroococcales: Aphanothecaceae). The genome sequence of the diatom is 60.3 megabases in span, and the cyanobacterial genome has a length of 2.48 megabases. Most of the diatom nuclear genome assembly is scaffolded into 15 chromosomal pseudomolecules. The organelle genomes have also been assembled, with the mitochondrial genome 40.08 kilobases and the plastid genome 130.75 kilobases in length. A number of other prokaryote MAGs were also assembled.

The genome sequence of the Elm Groundling moth, Carpatolechia fugitivella (Zeller, 1839)

We present a genome assembly from an individual male Carpatolechia fugitivella (the Elm Groundling; Arthropoda; Insecta; Lepidoptera; Gelechiidae). The genome sequence is 493.1 megabases in span. Most of the assembly is scaffolded into 30 chromosomal pseudomolecules, including the Z sex chromosome. The mitochondrial genome has also been assembled and is 15.26 kilobases in length. Gene annotation of this assembly on Ensembl identified 12,721 protein coding genes.

The genome sequence of a kelp fly, Coelopa pilipes Haliday, 1838

We present a genome assembly from an individual male Coelopa pilipes (kelp fly; Arthropoda; Insecta; Diptera; Coelopidae). The genome sequence is 263.0 megabases in span. Most of the assembly is scaffolded into 7 chromosomal pseudomolecules, including the X and Y sex chromosomes. The mitochondrial genome has also been assembled and is 16.86 kilobases in length.

The genome sequence of the Dracula fish, Danionella dracula (Britz, Conway & Rüber, 2009)

We present a genome assembly from an individual Danionella dracula (the Dracula fish; Chordata; Actinopterygii; Cypriniformes; Danionidae; Danioninae). The genome sequence is 665.21 megabases in span. This is a scaffold-level assembly, with a scaffold N50 of 10.29 Mb.

The genome sequence of the Atlantic cod, Gadus morhua (Linnaeus, 1758)

We present a genome assembly from an individual male Gadus morhua (the Atlantic cod; Chordata; Actinopteri; Gadiformes; Gadidae). The genome sequence is 669.9 megabases in span. Most of the assembly is scaffolded into 23 chromosomal pseudomolecules. Gene annotation of this assembly on Ensembl identified 23,515 protein coding genes.

A chromosomal reference genome sequence for the malaria mosquito, Anopheles gambiae, Giles, 1902, Ifakara strain

We present a genome assembly from an individual female Anopheles gambiae (the malaria mosquito; Arthropoda; Insecta; Diptera; Culicidae), Ifakara strain. The genome sequence is 264 megabases in span. Most of the assembly is scaffolded into three chromosomal pseudomolecules with the X sex chromosome assembled. The complete mitochondrial genome was also assembled and is 15.4 kilobases in length.

The genome sequence of the grey top shell, Steromphala cineraria (Linnaeus, 1758)

We present a genome assembly from an individual Steromphala cineraria (the grey topshell; Mollusca; Gastropoda; Trochida; Trochidae). The genome sequence is 1,270 megabases in span. Most of the assembly (99.23%) is scaffolded into 18 chromosomal pseudomolecules.

The genome sequence of the devil's coach horse beetle, Ocypus olens (Müller, 1764)

We present a genome assembly from an individual female Ocypus olens (the devil's coach horse; Arthropoda; Insecta; Coleoptera; Staphylinidae). The genome sequence is 1,084 megabases in span. The majority (98.81%) of the assembly is scaffolded into 20 chromosomal pseudomolecules, with the X sex chromosome assembled.

The genome sequence of rosebay willowherb Chamaenerion angustifolium (L.) Scop., 1771 (syn. Epilobium angustifolium L., 1753) (Onagraceae)

We present a genome assembly from an individual Chamaenerion angustifolium (fireweed; Tracheophyta; Magnoliopsida; Myrtales; Onagraceae). The genome sequence is 655.9 megabases in span. Most of the assembly is scaffolded into 18 chromosomal pseudomolecules. The mitochondrial and plastid genome assemblies have lengths of 495.18 kilobases and 160.41 kilobases in length, respectively.

The genome sequence of the giant clam, Tridacna gigas (Linnaeus, 1758)

We present a chromosomal-level genome assembly from an individual Tridacna gigas (the giant clam; Mollusca; Bivalvia; Veneroida; Cardiidae). The genome sequence is 1,175.9 megabases in span. Most of the assembly is scaffolded into 17 chromosomal pseudomolecules. The mitochondrial genome has also been assembled and is 25.34 kilobases in length. Gene annotation of this assembly on Ensembl identified 18,177 protein coding genes.

The genome sequence of the thickback sole, Microchirus variegatus (Donovan, 1808)

We present a genome assembly from an individual female Microchirus variegatus (the thickback sole; Chordata; Actinopteri; Pleuronectiformes; Soleidae). The genome sequence is 724.7 megabases in span. Most of the assembly is scaffolded into 23 chromosomal pseudomolecules. The mitochondrial genome has also been assembled and is 17.42 kilobases in length.

The genome sequence of a heart cockle, Fragum fragum (Linnaeus, 1758)

We present a genome assembly from an individual specimen of Fragum fragum (a heart cockle; Mollusca; Bivalvia; Veneroida; Cardiidae). The genome sequence is 1,153.1 megabases in span. Most of the assembly is scaffolded into 19 chromosomal pseudomolecules. The mitochondrial genome has also been assembled and is 22.36 kilobases in length. Gene annotation of this assembly on Ensembl identified 17,262 protein coding genes.

The genome sequence of field madder, Sherardia arvensis L., 1753 (Rubiaceae)

We present a genome assembly from an individual Sherardia arvensis (field madder; Tracheophyta; Magnoliopsida; Gentianales; Rubiaceae). The genome sequence is 440.9 megabases in span. Most of the assembly is scaffolded into 11 chromosomal pseudomolecules. The mitochondrial and plastid genome assemblies have lengths of 203.98 kilobases and 152.73 kilobases in length, respectively.

The genome sequence of common knotgrass, Polygonum aviculare L. (Polygonaceae)

We present a genome assembly from an individual Polygonum aviculare (common knotgrass; Eudicot; Magnoliopsida; Caryophyllales; Polygonaceae). The genome sequence is 351.6 megabases in span. Most of the assembly is scaffolded into 10 chromosomal pseudomolecules. The mitochondrial and plastid genome assemblies have lengths of 333.39 kilobases and 163.28 kilobases in length, respectively.

The genome sequence of great wood-rush, Luzula sylvatica (Huds) Gaudin

We present a genome assembly from an individual specimen of Luzula sylvatica (great wood-rush; Tracheophyta; Magnoliopsida; Poales; Juncaceae). The genome sequence is 444.5 megabases in span. Most of the assembly is scaffolded into 6 chromosomal pseudomolecules. The mitochondrial and plastid genome assemblies have lengths of 633.36 kilobases and 201.32 kilobases in length, respectively.

The genome sequence of the Black Lace-weaver spider, Amaurobius ferox (Walckenaer, 1830)

We present a genome assembly from an individual female Amaurobius ferox (the Black Lace-weaver; Arthropoda; Arachnida; Araneae; Amaurobiidae). The genome sequence is 3,564.8 megabases in span. Most of the assembly is scaffolded into 23 chromosomal pseudomolecules, including the X 1, X 2 and X 3 sex chromosomes. The mitochondrial genome has also been assembled and is 14.24 kilobases in length.

A High-Quality Blue Whale Genome, Segmental Duplications, and Historical Demography

The blue whale, Balaenoptera musculus, is the largest animal known to have ever existed, making it an important case study in longevity and resistance to cancer. To further this and other blue whale-related research, we report a reference-quality, long-read-based genome assembly of this fascinating species. We assembled the genome from PacBio long reads and utilized Illumina/10×, optical maps, and Hi-C data for scaffolding, polishing, and manual curation. We also provided long read RNA-seq data to facilitate the annotation of the assembly by NCBI and Ensembl. Additionally, we annotated both haplotypes using TOGA and measured the genome size by flow cytometry. We then compared the blue whale genome with other cetaceans and artiodactyls, including vaquita (Phocoena sinus), the world's smallest cetacean, to investigate blue whale's unique biological traits. We found a dramatic amplification of several genes in the blue whale genome resulting from a recent burst in segmental duplications, though the possible connection between this amplification and giant body size requires further study. We also discovered sites in the insulin-like growth factor-1 gene correlated with body size in cetaceans. Finally, using our assembly to examine the heterozygosity and historical demography of Pacific and Atlantic blue whale populations, we found that the genomes of both populations are highly heterozygous and that their genetic isolation dates to the last interglacial period. Taken together, these results indicate how a high-quality, annotated blue whale genome will serve as an important resource for biology, evolution, and conservation research.

The genome sequence of the wood-carving leafcutter bee, Megachile ligniseca (Kirby, 1802)

We present a genome assembly from an individual female Megachile ligniseca (the wood-carving leafcutter bee; Arthropoda; Insecta; Hymenoptera; Megachilidae). The genome sequence is 290.0 megabases in span. Most of the assembly is scaffolded into 16 chromosomal pseudomolecules. The mitochondrial genome has also been assembled and is 23.71 kilobases in length. Gene annotation of this assembly on Ensembl 11,722 protein coding genes.

The genome sequence of the Annual Mercury, Mercurialis annua L., 1753 (Euphorbiaceae)

We present a genome assembly from a diploid female Mercurialis annua (the Annual Mercury; Tracheophyta; Magnoliopsida; Malpighiales; Euphorbiaceae). The genome sequence is 453.2 megabases in span. Most of the assembly is scaffolded into 8 chromosomal pseudomolecules, including the X chromosome. The organelle genomes have also been assembled, and the mitochondrial genome is 435.28 kilobases in length, while the plastid genome is 169.65 kilobases in length.

The genome sequence of the Mournful Wasp, Pemphredon lugubris (Fabricius, 1793)

We present a genome assembly from an individual male Pemphredon lugubris (the Mournful Wasp; Arthropoda; Insecta; Hymenoptera; Crabronidae). The genome sequence is 328.1 megabases in span. Most of the assembly is scaffolded into 5 chromosomal pseudomolecules. The mitochondrial genome has also been assembled and is 15.88 kilobases in length. Gene annotation of this assembly on Ensembl identified 10,335 protein coding genes.

The genome sequence of a muscid fly, Hydrotaea cyrtoneurina (Zetterstedt, 1845)

We present a genome assembly from an individual female Hydrotaea cyrtoneurina (muscid fly; Arthropoda; Insecta; Diptera; Muscidae). The genome sequence is 575.2 megabases in span. Most of the assembly is scaffolded into 6 chromosomal pseudomolecules. The mitochondrial genome has also been assembled and is 19.6 kilobases in length.

The genome sequence of a metallic wood-boring beetle, Agrilus cyanescens (Ratzeburg, 1837)

We present a genome assembly from an individual female Agrilus cyanescens (metallic wood-boring beetle; Arthropoda; Insecta; Coleoptera; Buprestidae). The genome sequence is 292.3 megabases in span. Most of the assembly is scaffolded into 10 chromosomal pseudomolecules, including the X sex chromosome. The mitochondrial genome has also been assembled and is 15.91 kilobases in length.

The genome sequence of the Lobe-spurred Furrow Bee, Lasioglossum pauxillum (Schenck, 1853)

We present a genome assembly from an individual female Lasioglossum pauxillum (the Lobe-spurred Furrow Bee; Arthropoda; Insecta; Hymenoptera; Halictidae). The genome sequence is 432.0 megabases in span. Most of the assembly is scaffolded into 9 chromosomal pseudomolecules. The mitochondrial genome has also been assembled and is 27.71 kilobases in length. Gene annotation of this assembly on Ensembl identified 12,353 protein coding genes.

The genome sequence of a barkfly, Mesopsocus fuscifrons Meinander, 1966

We present a genome assembly from an individual female Mesopsocus fuscifrons (barkfly; Arthropoda; Insecta; Psocodea; Mesopsocidae). The genome sequence is 184.3 megabases in span. Most of the assembly is scaffolded into 9 chromosomal pseudomolecules. The mitochondrial genome has also been assembled and is 20.13 kilobases in length.

The genome sequence of the black-footed limpet, Patella depressa (Pennant, 1777)

We present a genome assembly from an individual Patella depressa (the black-footed limpet; Mollusca; Gastropoda; Patellogastropoda; Patellidae). The genome sequence is 683.7 megabases in span. Most of the assembly is scaffolded into 9 chromosomal pseudomolecules. Gene annotation of this assembly on Ensembl identified 20,502 protein coding genes.

The genome sequence of the Emperor moth, Saturnia pavonia (Linnaeus, 1758)

We present a genome assembly from an individual male Saturnia pavonia (the Emperor moth; Arthropoda; Insecta; Lepidoptera; Saturniidae). The genome sequence is 489.9 megabases in span. Most of the assembly is scaffolded into 30 chromosomal pseudomolecules, including the Z sex chromosome. The mitochondrial genome has also been assembled and is 15.29 kilobases in length. Gene annotation of this assembly on Ensembl identified 11,903 protein coding genes.

Chromosome level genome assembly of the Etruscan shrew Suncus etruscus

Suncus etruscus is one of the world's smallest mammals, with an average body mass of about 2 grams. The Etruscan shrew's small body is accompanied by a very high energy demand and numerous metabolic adaptations. Here we report a chromosome-level genome assembly using PacBio long read sequencing, 10X Genomics linked short reads, optical mapping, and Hi-C linked reads. The assembly is partially phased, with the 2.472 Gbp primary pseudohaplotype and 1.515 Gbp alternate. We manually curated the primary assembly and identified 22 chromosomes, including X and Y sex chromosomes. The NCBI genome annotation pipeline identified 39,091 genes, 19,819 of them protein-coding. We also identified segmental duplications, inferred GO term annotations, and computed orthologs of human and mouse genes. This reference-quality genome will be an important resource for research on mammalian development, metabolism, and body size control.

The genome sequence of the English holly, Ilex aquifolium L. (Aquifoliaceae)

We present a genome assembly from an individual Ilex aquifolium (the English holly; Eudicot; Magnoliopsida; Aquifoliales; Aquifoliaceae). The genome sequence is 800.0 megabases in span. Most of the assembly is scaffolded into 20 chromosomal pseudomolecules. The assembled mitochondrial and plastid genomes have lengths of 538.43 kilobases and 157.52 kilobases in length, respectively.

The genome sequence of the Tipped Oak Case-bearer, Coleophora flavipennella (Duponchel 1843)

We present a genome assembly from an individual female Coleophora flavipennella (the Tipped Oak Case-bearer; Arthropoda; Insecta; Lepidoptera; Coleophoridae). The genome sequence is 989.3 megabases in span. Most of the assembly is scaffolded into 57 chromosomal pseudomolecules, including the W and Z sex chromosomes. The mitochondrial genome has also been assembled and is 15.77 kilobases in length.

The genome of Litomosoides sigmodontis illuminates the origins of Y chromosomes in filarial nematodes

Heteromorphic sex chromosomes are usually thought to have originated from a pair of autosomes that acquired a sex-determining locus and subsequently stopped recombining, leading to degeneration of the sex-limited chromosome. The majority of nematode species lack heteromorphic sex chromosomes and determine sex using an X-chromosome counting mechanism, with males being hemizygous for one or more X chromosomes (XX/X0). Some filarial nematode species, including important parasites of humans, have heteromorphic XX/XY karyotypes. It has been assumed that sex is determined by a Y-linked locus in these species. However, karyotypic analyses suggested that filarial Y chromosomes are derived from the unfused homologue of an autosome involved in an X-autosome fusion event. Here, we generated a chromosome-level reference genome for Litomosoides sigmodontis, a filarial nematode with the ancestral filarial karyotype and sex determination mechanism (XX/X0). By mapping the assembled chromosomes to the rhabditid nematode ancestral linkage (or Nigon) elements, we infer that the ancestral filarial X chromosome was the product of a fusion between NigonX (the ancestrally X-linked element) and NigonD (ancestrally autosomal). In the two filarial lineages with XY systems, there have been two independent X-autosome chromosome fusion events involving different autosomal Nigon elements. In both lineages, the region shared by the neo-X and neo-Y chromosomes is within the ancestrally autosomal portion of the X, confirming that the filarial Y chromosomes are derived from the unfused homologue of the autosome. Sex determination in XY filarial nematodes therefore likely continues to operate via the ancestral X-chromosome counting mechanism, rather than via a Y-linked sex-determining locus.

The genome sequence of the white-footed hoverfly, Platycheirus albimanus (Fabricius, 1781)

We present a genome assembly from an individual female Platycheirus albimanus (the white-footed hoverfly; Arthropoda; Insecta; Diptera; Syrphidae). The genome sequence is 677.8 megabases in span. Most of the assembly is scaffolded into 4 chromosomal pseudomolecules, including the X sex chromosome. The mitochondrial genome has also been assembled and is 18.17 kilobases in length. Gene annotation of this assembly on Ensembl identified 12,568 protein coding genes.

The genome sequence of the European flat oyster, Ostrea edulis (Linnaeus, 1758)

We present a genome assembly from an individual Ostrea edulis (the European flat oyster; Mollusca; Bivalvia; Ostreida; Ostreidae). The genome sequence is 894.8 megabases in span. Most of the assembly is scaffolded into 10 chromosomal pseudomolecules. The mitochondrial genome has also been assembled and is 16.35 kilobases in length.

The genome sequence of a digger wasp, Ectemnius lituratus (Panzer,1805)

We present a genome assembly from an individual female Ectemnius lituratus (a digger wasp; Arthropoda; Insecta; Hymenoptera; Crabronidae). The genome sequence is 235.1 megabases in span. Most of the assembly is scaffolded into 13 chromosomal pseudomolecules. The mitochondrial genome has also been assembled and is 29.67 kilobases in length. Gene annotation of this assembly on Ensembl identified 9,724 protein coding genes.

Ancient diversity in host-parasite interaction genes in a model parasitic nematode

Host-parasite interactions exert strong selection pressures on the genomes of both host and parasite. These interactions can lead to negative frequency-dependent selection, a form of balancing selection that is hypothesised to explain the high levels of polymorphism seen in many host immune and parasite antigen loci. Here, we sequence the genomes of several individuals of Heligmosomoides bakeri, a model parasite of house mice, and Heligmosomoides polygyrus, a closely related parasite of wood mice. Although H. bakeri is commonly referred to as H. polygyrus in the literature, their genomes show levels of divergence that are consistent with at least a million years of independent evolution. The genomes of both species contain hyper-divergent haplotypes that are enriched for proteins that interact with the host immune response. Many of these haplotypes originated prior to the divergence between H. bakeri and H. polygyrus, suggesting that they have been maintained by long-term balancing selection. Together, our results suggest that the selection pressures exerted by the host immune response have played a key role in shaping patterns of genetic diversity in the genomes of parasitic nematodes.

The genome sequence of the light-bulb sea squirt, Clavelina lepadiformis (Müller, 1776)

We present a genome assembly from an individual Clavelina lepadiformis (the light-bulb sea squirt; Chordata; Ascidiacea; Aplousobranchia; Clavelinidae). The genome sequence is 210.1 megabases in span. Most of the assembly is scaffolded into 9 chromosomal pseudomolecules. The mitochondrial genome has also been assembled and is 14.48 kilobases in length.

The genome sequence of a ground beetle, Pterostichus niger (Schaller, 1783)

We present a genome assembly from an individual male Pterostichus niger (a ground beetle; Arthropoda; Insecta; Coleoptera; Carabidae). The genome sequence is 674.1 megabases in span. Most of the assembly is scaffolded into 19 chromosomal pseudomolecules, including the X sex chromosome. The mitochondrial genome has also been assembled and is 17.16 kilobases in length.

A pangenome graph reference of 30 chicken genomes allows genotyping of large and complex structural variants

BACKGROUND

The red junglefowl, the wild outgroup of domestic chickens, has historically served as a reference for genomic studies of domestic chickens. These studies have provided insight into the etiology of traits of commercial importance. However, the use of a single reference genome does not capture diversity present among modern breeds, many of which have accumulated molecular changes due to drift and selection. While reference-based resequencing is well-suited to cataloging simple variants such as single-nucleotide changes and short insertions and deletions, it is mostly inadequate to discover more complex structural variation in the genome.

METHODS

We present a pangenome for the domestic chicken consisting of thirty assemblies of chickens from different breeds and research lines.

RESULTS

We demonstrate how this pangenome can be used to catalog structural variants present in modern breeds and untangle complex nested variation. We show that alignment of short reads from 100 diverse wild and domestic chickens to this pangenome reduces reference bias by 38%, which affects downstream genotyping results. This approach also allows for the accurate genotyping of a large and complex pair of structural variants at the K feathering locus using short reads, which would not be possible using a linear reference.

CONCLUSIONS

We expect that this new paradigm of genomic reference will allow better pinpointing of exact mutations responsible for specific phenotypes, which will in turn be necessary for breeding chickens that meet new sustainability criteria and are resilient to quickly evolving pathogen threats.

The genome sequence of Pycnococcus provasolii (CCAP190/2) (Guillard, 1991)

We present a genome assembly from cultured Pycnococcus provasolii (a marine green alga; Chlorophyta; None; Pseudoscourfieldiales; Pycnococcaceae). The genome sequence is 32.2 megabases in span. Most of the assembly is scaffolded into 44 chromosomal pseudomolecules (99.67%). The mitochondrial and plastid genomes have also been assembled, and the length of the mitochondrial scaffold is 24.3 kilobases and of the plastid genome has been assembled and is 80.2 kilobases in length.

The genome sequence of the Rose-flounced Tabby, Endotricha flammealis (Denis & Schiffermüller, 1775)

We present a genome assembly from an individual female Endotricha flammealis (the Rose-flounced Tabby; Arthropoda; Insecta; Lepidoptera; Pyralidae). The genome sequence is 473.9 megabases in span. Most of the assembly is scaffolded into 32 chromosomal pseudomolecules, including the W and Z sex chromosomes. The mitochondrial genome has also been assembled and is 15.23 kilobases in length. Gene annotation of this assembly on Ensembl identified 17,578 protein coding genes.

The genome sequence of the Heterolobosean amoeboflagellate, Tetramitus jugosus CCAP 1588/3C

We present a genome assembly from cultivated Tetramitus jugosus (Heterolobosea; Schizopyrenida; Vahlkampfiidae). The genome sequence is 26.3 megabases in span. Most of the assembly (99.3%) is scaffolded into 52 chromosomal pseudomolecules. The mitochondrial genome has also been assembled and is 49.46 kilobases in length.

The genome sequence of the Six-belted Clearwing, Bembecia ichneumoniformis (Denis & Schiffermüller, 1775)

We present a genome assembly from an individual male Bembecia ichneumoniformis (the Six-belted Clearwing; Arthropoda; Insecta; Lepidoptera; Sesiidae). The genome sequence is 511.4 megabases in span. Most of the assembly is scaffolded into 31 chromosomal pseudomolecules, including the Z sex chromosome. The mitochondrial genome has also been assembled and is 15.32 kilobases in length. Gene annotation of this assembly on Ensembl identified 12,114 protein coding genes.

A chromosomal reference genome sequence for the malaria mosquito, Anopheles moucheti, Evans, 1925

We present a genome assembly from an individual male Anopheles moucheti (the malaria mosquito; Arthropoda; Insecta; Diptera; Culicidae), from a wild population in Cameroon. The genome sequence is 271 megabases in span. The majority of the assembly is scaffolded into three chromosomal pseudomolecules with the X sex chromosome assembled. The complete mitochondrial genome was also assembled and is 15.5 kilobases in length.

The genome sequence of the Flame Shoulder, Ochropleura plecta (Linnaeus, 1761)

We present a genome assembly from an individual female Ochropleura plecta (the Flame Shoulder; Arthropoda; Insecta; Lepidoptera; Noctuidae). The genome sequence is 643.9 megabases in span. Most of the assembly is scaffolded into 32 chromosomal pseudomolecules, including the W and Z sex chromosomes. The mitochondrial genome has also been assembled and is 15.34 kilobases in length. Gene annotation of this assembly on Ensembl identified 19,016 protein coding genes.