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Research: Lambdoid phages with abundant Chi recombination hotspots reflect diverse viral strategies for recombination-dependent growth
- Clarence Zheng,
- Sherwood R. Casjens,
- Alan R. Davidson,
- Susan K. Amundsen,
- and Gerald R. Smith
Genome Res. August 2025 35: 1767-1780; Published in Advance July 10, 2025, doi:10.1101/gr.280248.124
...'s recombination proteins RecA and RecBCD for growth (Sternberg and Hoess 1983). These proteins promote recombination of P1's terminal direct repeats of ∼5–10 kbp when P1's 94.8 kbp linear DNA is injected into the cell. Terminal-repeat recombination forms circular DNA, which is replicated to form the concatemeric...
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Method: Chromosome engineering to correct a complex rearrangement on Chromosome 8 reveals the effects of 8p syndrome on gene expression and neural differentiation
- Sophia N. Lee,
- Erin C. Banda,
- Lu Qiao,
- Sarah L. Thompson,
- Karan Singh,
- Ryan A. Hagenson,
- Teresa Davoli,
- Stefan F. Pinter,
- and Jason M. Sheltzer
Genome Res. March 2026 36: 547-560; Published in Advance January 12, 2026, doi:10.1101/gr.280425.125
...of a terminal distal deletion and an inverted duplication proximal to the Chromosome 8 centromere, termed invdupdel(8p) (Santucci et al. 2025). This rearrangement arises from aberrant pairing and recombination events during meiosis, which may be owing to the presence of the beta-defensin repeats and olfactory...
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Research: Cell-type- and chromosome-specific chromatin landscapes and DNA replication programs of Drosophila testis tumor stem cell–like cells
- Jennifer A. Urban,
- Daniel Ringwalt,
- John M. Urban,
- Wingel Xue,
- Ryan Gleason,
- Keji Zhao,
- and Xin Chen
Genome Res. January 2026 36: 83-101; Published in Advance December 10, 2025, doi:10.1101/gr.280809.125
...Cell-type- and chromosome-specific chromatin landscapes and DNA replication programs of Drosophila testis tumor stem cell–like cells Jennifer A. Urban1, Daniel Ringwalt1, John M. Urban2,3, Wingel Xue1,5, Ryan Gleason1, Keji Zhao4 and Xin Chen1,2 1Department of Biology, The Johns Hopkins University...
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Research: Unexpectedly low recombination rates and presence of hotspots in termite genomes
- Turid Everitt,
- Tilman Rönneburg,
- Daniel Elsner,
- Anna Olsson,
- Yuanzhen Liu,
- Tuuli Larva,
- Judith Korb,
- and Matthew T. Webster
Genome Res. May 2025 35: 1124-1137; Published in Advance March 20, 2025, doi:10.1101/gr.279180.124
...: It is essential for correct disjunction of chromosomes during cell division, and it generates new combinations of genetic variants that form the raw material of evolution (Hartfield and Keightley 2012). However, recombination can also be deleterious, as it can generate structural mutations and break up favorable...
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Research: Multiple paralogs and recombination mechanisms contribute to the high incidence of 22q11.2 deletion syndrome
- Lisanne Vervoort,
- Nicolas Dierckxsens,
- Marta Sousa Santos,
- Senne Meynants,
- Erika Souche,
- Ruben Cools,
- Tracy Heung,
- Koen Devriendt,
- Hilde Peeters,
- Donna M. McDonald-McGinn,
- Ann Swillen,
- Jeroen Breckpot,
- Beverly S. Emanuel,
- Hilde Van Esch,
- Anne S. Bassett,
- and Joris R. Vermeesch
Genome Res. April 2025 35: 786-797; Published in Advance November 13, 2024, doi:10.1101/gr.279331.124
...-read sequencing cannot resolve the complex segmental duplications (SDs) to provide direct confirmation of the hypothesis that the rearrangements are caused by nonallelic homologous recombination between the low copy repeats on Chromosome 22 (LCR22s). To enable haplotype-specific assembly and rearrangement mapping...
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Research: Extreme heterochiasmy and high rates of sex-reversed recombination result in large yet homomorphic sex chromosomes in the Emei moustache toad
- Siyu Xie,
- Jun Li,
- Wanyan Chen,
- Lydia J.M. Fong,
- Chunhua Huang,
- Yan Feng,
- Qingbo Ai,
- Mian Zhao,
- Judith E. Mank,
- and Hua Wu
Genome Res. June 2025 35: 1325-1336; Published in Advance April 24, 2025, doi:10.1101/gr.280161.124
...on the Y Chromosome form an equilibrium with the XY recombination of sex-reversed individuals, which resulted in a long-term suppression of XY divergence. In this case, Chr 1 may have been maintained as the sex chromosome for a long evolutionary period of time. Additionally, repeated recruitment of Chr 1...
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Research: AGAP duplicons associate with structural diversity at Chromosome 10q11.22
- Stefania Fornezza,
- Vincenza Simona Delvecchio,
- William T. Harvey,
- Philip C. Dishuck,
- Evan E. Eichler,
- and Giuliana Giannuzzi
Genome Res. October 2024 34: 1487-1499; Published in Advance September 25, 2024, doi:10.1101/gr.279454.124
...on the homologous chromosome or additional inversion events (inversion toggling) and subsequent recombination in the region between the inverted SDs. Indeed, there is evidence of mutational toggling for this inversion (Porubsky et al. 2020, 2022) and of recombination in the GDF10 segment (Supplemental Fig. S1...
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Research: Identification of the male-specific region on the guppy Y Chromosome from a haplotype-resolved assembly
- Kang Du,
- Oliver Deusch,
- Ilja Bezrukov,
- Christa Lanz,
- Yann Guiguen,
- Margarete Hoffmann,
- Anette Habring,
- Detlef Weigel,
- Manfred Schartl,
- and Christine Dreyer
Genome Res. March 2025 35: 489-498; Published in Advance March 5, 2025, doi:10.1101/gr.279582.124
...–driven evolution for more than a century. Despite strong efforts, knowledge on genomic organization and molecular differentiation of the sex chromosome pair remains unsatisfactory and partly contradictory with respect to regions of reduced recombination. Especially the border between pseudoautosomal and male...
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Research: The grasshopper genome reveals long-term gene content conservation of the X Chromosome and temporal variation in X Chromosome evolution
- Xinghua Li,
- Judith E. Mank,
- and Liping Ban
Genome Res. July 2024 34: 997-1007; Published in Advance August 5, 2024, doi:10.1101/gr.278794.123
..., and Diptera, and the 800 Mb grasshopper X Chromosome is homologous to the fly ancestral X Chromosome despite 400 million years of divergence, suggesting either repeated origin of sex chromosomes with highly similar gene content, or long-term conservation of the X Chromosome. We use this broad conservation...
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Resource: Chromosome-level subgenome-aware de novo assembly provides insight into Saccharomyces bayanus genome divergence after hybridization
- Cory Gardner,
- Junhao Chen,
- Christina Hadfield,
- Zhaolian Lu,
- David Debruin,
- Yu Zhan,
- Maureen J. Donlin,
- Tae-Hyuk Ahn,
- and Zhenguo Lin
Genome Res. November 2024 34: 2133-2146; Published in Advance September 17, 2024, doi:10.1101/gr.279364.124
...terminal repeats (LTRs), may have facilitated recombination between different chromosomes (Fischer et al. 2000; Mieczkowski et al. 2006). We then identified all LTR sequences in the hybrid and examined their chromosomal distribution. We found that LTR retrotransposons are significantly enriched within 5 kb...

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