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Related Concept Videos

Conservative Site-specific Recombination and Phase Variation02:53

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Because the DNA segments are cut and reorganized in a direction-specific manner, site-specific recombination has emerged as an efficient genetic engineering technique. Flippase and Cyclization recombinases or Flp and Cre, respectively, are two members of the tyrosine recombinase family derived from bacteriophages, that are used to mediate site-specific DNA insertions, deletions, and targeted expression of proteins in mammalian cell lines.
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Cells are sometimes infected by more than one virus at once. When two viruses disassemble to expose their genomes for replication in the same cell, similar regions of their genomes can pair together and exchange sequences in a process called recombination. Alternatively, viruses with segmented genomes can swap segments in a process called reassortment.
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Overview of Transposition and Recombination02:13

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Transposons make up a significant part of genomes of various organisms. Therefore, it is believed that transposition played a major evolutionary role in speciation by changing genome sizes and modifying gene expression patterns. For example, in bacteria, transposition can lead to conferring antibiotic resistance. Movement of transposable elements within the genetic pool of pathogenic bacteria can aid in transfer of antibiotic-resistant genetic elements. In eukaryotes, transposons can carry out...
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Genome comparison is one of the excellent ways to interpret the evolutionary relationships between organisms. The basic principle of genome comparison is that if two species share a common feature, it is likely encoded by the DNA sequence conserved between both species. The advent of genome sequencing technologies in the late 20th century enabled scientists to understand the concept of conservation of domains between species and helped them to deduce evolutionary relationships across diverse...
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The evolution of new genes is critical for speciation. Exon recombination, also known as exon shuffling or domain shuffling, is an important means of new gene formation. It is observed across vertebrates, invertebrates, and in some plants such as potatoes and sunflowers. During exon recombination, exons from the same or different genes recombine and produce new exon-intron combinations, which might evolve into new genes. 
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Recombineering Homologous Recombination Constructs in Drosophila
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Recombination-aware phylogenomics.

Frank T Burbrink1, Dylan DeBaun1, Nicole M Foley2

  • 1Department of Herpetology, American Museum of Natural History, New York, NY 10024, USA.

Trends in Ecology & Evolution
|July 18, 2025
PubMed
Summary
This summary is machine-generated.

Phylogenetic studies are improved by understanding genome structure and recombination rates together. Analyzing marker position alongside chromosome evolution reveals true evolutionary relationships, not just gene flow.

Keywords:
introgressionnatural selectionphylogenyrecombinationspeciation

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Area of Science:

  • Genomics
  • Evolutionary Biology
  • Phylogenetics

Background:

  • Phylogenetic variation, recombination rate evolution, and genome structure are typically studied separately.
  • Fragmented genome assemblies limit understanding of marker context in phylogenetic studies.
  • Marker genomic location significantly impacts inferred phylogeny, often reflecting introgression over speciation.

Purpose of the Study:

  • To explore the interplay of chromosome evolution, recombination landscapes, and phylogenetic signal.
  • To leverage chromosome-level genome assemblies and advanced recombination rate estimation.
  • To provide a more accurate understanding of evolutionary relationships.

Main Methods:

  • Utilizing chromosome-level genome assemblies.
  • Employing advanced methods for estimating genome-wide recombination rates.
  • Integrating genomic context with phylogenetic analyses.

Main Results:

  • Demonstrating how chromosomal position influences phylogenetic inference.
  • Highlighting the role of recombination landscapes in shaping phylogenetic signal.
  • Revealing patterns of post-speciation introgression versus bifurcating speciation.

Conclusions:

  • Joint analysis of genome structure and recombination is crucial for accurate phylogenetics.
  • Understanding chromosome evolution provides critical context for phylogenetic markers.
  • Advances in genomics enable a more integrated approach to studying evolutionary history.