ArticleGenome biology and evolution2021
DNA Transposon Expansion is Associated with Genome Size Increase in Mudminnows.
Article in Genome biology and evolution, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 9 papers.
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Who cites it
9 citing papers in PubMed, 17 citations in OpenAlex.
- Regulatory Logic and Transposable Element Dynamics in Caenorhabditis Genomes.Genome biology and evolution · 2026Article
- A recent and rapid genome expansion driven by the amplification of transposable elements in the Neotropical annual killifish Garcialebias charrua.Biological research · 2025Article
- Satellite DNAs rising from the transposon graveyards.DNA research : an international journal for rapid publication of reports on genes and genomes · 2025Review
- Investigating the Impact of Whole-Genome Duplication on Transposable Element Evolution in Teleost Fishes.Genome biology and evolution · 2025Article
- The evolutionary dynamics of genome sizes and repetitive elements in Ensifera (Insecta: Orthoptera).BMC genomics · 2024Article
- Long-read de novo genome assembly of Gulf toadfish (Opsanus beta).BMC genomics · 2024Article
- Mapping of Repetitive Sequences inAnimals : an open access journal from MDPI · 2024Article
- Genome sizes and repeatome evolution in zoantharians (Cnidaria: Hexacorallia: Zoantharia).PeerJ · 2023Article
- Transposons and non-coding regions drive the intrafamily differences of genome size in insects.iScience · 2022Article
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Authors and funding
10 authors at 8 institutions in 7 countries.
Funding
No grant is acknowledged in the PubMed record.
Abstract
Genome sizes of eukaryotic organisms vary substantially, with whole-genome duplications (WGD) and transposable element expansion acting as main drivers for rapid genome size increase. The two North American mudminnows, Umbra limi and Umbra pygmaea, feature genomes about twice the size of their sister lineage Esocidae (e.g., pikes and pickerels). However, it is unknown whether all Umbra species share this genome expansion and which causal mechanisms drive this expansion. Using flow cytometry, we find that the genome of the European mudminnow is expanded similarly to both North American species, ranging between 4.5 and 5.4 pg per diploid nucleus. Observed blocks of interstitially located telomeric repeats in U. limi suggest frequent Robertsonian rearrangements in its history. Comparative analyses of transcriptome and genome assemblies show that the genome expansion in Umbra is driven by the expansion of DNA transposon and unclassified repeat sequences without WGD. Furthermore, we find a substantial ongoing expansion of repeat sequences in the Alaska blackfish Dallia pectoralis, the closest relative to the family Umbridae, which might mark the beginning of a similar genome expansion. Our study suggests that the genome expansion in mudminnows, driven mainly by transposon expansion, but not WGD, occurred before the separation into the American and European lineage.
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