Genomic and transcriptomic perspectives on the origin and evolution of NUMTs in Orthoptera

Molecular Phylogenetics and Evolution, Journal Year: 2024, Volume and Issue: unknown, P. 108221 - 108221

Published: Oct. 1, 2024

Language: Английский

---

Evolutionary Dynamics of Satellite DNA Repeats across the Tettigoniidae Family: Insights from Genomic Analysis

Biomolecules, Journal Year: 2024, Volume and Issue: 14(8), P. 915 - 915

Published: July 27, 2024

Satellite DNA repeats are repetitive sequences found in eukaryotic genomes, typically consisting of short motifs repeated tandem arrays. Despite the vast body literature on satellite other taxa, investigations specifically targeting Tettigoniidae remain conspicuously absent. Our study aims to fill a critical gap our understanding satellitome evolutionary processes shaping genomes. Repeatome analysis revealed that Meconema thalassinum genome comprises 92%, and Phryganogryllacris superangulata had lowest value 34%, with an average 67% species. The reveals significant variation number across species family, M. exhibiting highest count, 246, reported insects date 10, Pholidoptera griseoptera. Ruspolia dubia yunnana, which congeneric species, showcase distinct counts 104 84 families, respectively. R. exhibit abundance, constituting 17.2% total genome, while abundance was P. griseoptera, at 5.65%. size correlates weakly family count (rs = 0.42, p 0.29), but strong correlation exists between 0.73, 0.03). Moreover, gain loss patterns provides insights into amplification homogenization families within species-specific positive trend toward amplification. chromosomal distribution displayed accumulation observed Chr12, Chr01, Chr04, 17.79%, 17.4%, 17.22% chromosome size, chromosome-specific propagation evident, MthSat01 solely 1 MthSat170 2, sharing 1.64% 2.33%. conservation variations abundances, along loss, indicate influence potentially diverse genomic landscape these insects, requires further investigation. Furthermore, differential specific chromosomes implies potential functions or structural features retention proliferation sequences.

Language: Английский

---

The evolutionary dynamics of genome sizes and repetitive elements in Ensifera (Insecta: Orthoptera)

BMC Genomics, Journal Year: 2024, Volume and Issue: 25(1)

Published: Nov. 5, 2024

In evolutionary biology, identifying and quantifying inter-lineage genome size variation elucidating the underlying causes of that have long been goals. Repetitive elements (REs) proposed confirmed as being among most important contributors to variation. However, implications RE dynamics are not well understood. A total 35 Ensifera insects were collected from different areas in China, including nine species crickets 26 katydids. The sizes seven then determined using flow cytometry. RepeatExplorer2 pipeline was employed retrieve repeated sequences for each species, based on low-coverage (0.1 X) high-throughput Illumina unassembled short reads. exhibited a considerable degree variation, ranging 1.00 18.34 pg. This more than 18-fold. Similarly, abundances 13.66 61.16%. addition, Tettigonioidea had larger genomes contained significantly REs did Grylloidea genomes. Analysis correlation between abundance revealed REs, transposable (TEs), terminal repeats (LTRs), interspersed nuclear (LINEs) correlated with size. Notably, there is an inflection point this correlation, where increasingly large (e.g., > 5–10 pg) contribute less expansion expected. Furthermore, study contrasting directions clades terms REs. exhibit gradual increase ancestral they diverge, while experience sustained contraction. reveals extensive insects, distinct patterns across two major groups, Grylloidea. provides valuable insights into offering comprehensive understanding their history.

Language: Английский

---

Transcriptional dynamics and tissue-specific expression patterns of transposable elements in orthopteran insects

Gene, Journal Year: 2024, Volume and Issue: 936, P. 149090 - 149090

Published: Nov. 15, 2024

Language: Английский

---