Highly contiguous assemblies of 101 drosophilid genomes
Abstract
Over 100 years of studies in Drosophila melanogaster and related species in the genus Drosophila have facilitated key discoveries in genetics, genomics, and evolution. While high-quality genome assemblies exist for several species in this group, they only encompass a small fraction of the genus. Recent advances in long-read sequencing allow high-quality genome assemblies for tens or even hundreds of species to be efficiently generated. Here, we utilize Oxford Nanopore sequencing to build an open community resource of genome assemblies for 101 lines of 93 drosophilid species encompassing 14 species groups and 35 sub-groups. The genomes are highly contiguous and complete, with an average contig N50 of 10.5 Mb and greater than 97% BUSCO completeness in 97/101 assemblies. We show that Nanopore-based assemblies are highly accurate in coding regions, particularly with respect to coding insertions and deletions. These assemblies, along with a detailed laboratory protocol and assembly pipelines, are released as a public resource and will serve as a starting point for addressing broad questions of genetics, ecology, and evolution at the scale of hundreds of species.
Data availability
All sequencing data and assemblies generated by this study are deposited at NCBI SRA and GenBank under NCBI BioProject PRJNA675888. Accession numbers for all data used but not generated by this study are provided in the supporting files. Dockerfiles and scripts for reproducing pipelines and analyses are provided on GitHub (https://github.com/flyseq/drosophila_assembly_pipelines). A detailed wet lab protocol is provided at Protocols.io (https://dx.doi.org/10.17504/protocols.io.bdfqi3mw).
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Nanopore-based assembly of many drosophilid genomesNCBI BioProject, PRJNA675888.
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Sequencing and assembly of 14 Drosophila speciesNCBI BioProject, ID: 427774.
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modENCODE Drosophila reference genome sequencing (fruit flies)NCBI BioProject, ID: 62477.
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Drosophila montium Species Group Genomes ProjectNCBI BioProject, ID: 554346.
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Invertebrate sample from Drosophila repletaNCBI BioProject, ID: 476692.
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Genome sequences of 10 Drosophila speciesNCBI BioProject, ID: 322011.
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Raw genomic sequencing data from 16 Drosophila speciesNCBI BioProject, ID: 550077.
Article and author information
Author details
Funding
National Institute of General Medical Sciences (F32GM135998)
- Bernard Y Kim
National Institute of General Medical Sciences (R35GM119816)
- Noah K Whiteman
Uehara Memorial Foundation (201931028)
- Teruyuki Matsunaga
Ministry of Education, Science and Technological Development of the Republic of Serbia (451-03-68/2020-14/200178)
- Marina Stamenković-Radak
- Mihailo Jelić
- Marija Savić Veselinović
Ministry of Education, Science and Technological Development of the Republic of Serbia (451-03-68/2020-14/200007)
- Marija Tanasković
- Pavle Erić
National Natural Science Foundation of China (32060112)
- Jian-Jun Gao
Japan Society for the Promotion of Science (JP18K06383)
- Masayoshi Watada
European Union Horizon 2020 Research and Innovation Program (765937-CINCHRON)
- Giulia Manoli
- Enrico Bertolini
Czech Science Foundation (19-13381S)
- Vladimír Košťál
Japan Society for the Promotion of Science (JP19H03276)
- Aya Takahashi
National Science Foundation (1345247)
- Donald K Price
National Institute of General Medical Sciences (R35GM118165)
- Dmitri A Petrov
National Institute of Diabetes and Digestive and Kidney Diseases (K01DK119582)
- Jeremy Wang
National Science Foundation (DEB-1457707)
- Corbin D Jones
National Institute of General Medical Sciences (R01GM121750)
- Daniel R Matute
National Institute of General Medical Sciences (R01GM125715)
- Daniel R Matute
Google Cloud Platform Research Credits
- Bernard Y Kim
Google Cloud Platform Research Credits
- Jeremy Wang
National Institute of General Medical Sciences (R35GM122592)
- Artyom Kopp
The funders had no role in study design, data collection and interpretation, or the decision to submit the work for publication.
Reviewing Editor
- Graham Coop, University of California, Davis, United States
Version history
- Preprint posted: December 15, 2020 (view preprint)
- Received: January 11, 2021
- Accepted: July 16, 2021
- Accepted Manuscript published: July 19, 2021 (version 1)
- Version of Record published: August 4, 2021 (version 2)
- Version of Record updated: March 18, 2022 (version 3)
Copyright
© 2021, Kim et al.
This article is distributed under the terms of the Creative Commons Attribution License permitting unrestricted use and redistribution provided that the original author and source are credited.
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Further reading
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- Evolutionary Biology
Extant ecdysozoans (moulting animals) are represented by a great variety of soft-bodied or articulated organisms that may or may not have appendages. However, controversies remain about the vermiform nature (i.e. elongated and tubular) of their ancestral body plan. We describe here Beretella spinosa gen. et sp. nov. a tiny (maximal length 3 mm) ecdysozoan from the lowermost Cambrian, Yanjiahe Formation, South China, characterized by an unusual sack-like appearance, single opening, and spiny ornament. Beretella spinosa gen. et sp. nov has no equivalent among animals, except Saccorhytus coronarius, also from the basal Cambrian. Phylogenetic analyses resolve both fossil species as a sister group (Saccorhytida) to all known Ecdysozoa, thus suggesting that ancestral ecdysozoans may have been non-vermiform animals. Saccorhytids are likely to represent an early off-shot along the stem-line Ecdysozoa. Although it became extinct during the Cambrian, this animal lineage provides precious insight into the early evolution of Ecdysozoa and the nature of the earliest representatives of the group.