Study of Glyptapanteles indiensis Bracovirus Genome Structure
Author Information
Author(s): Christopher A Desjardins, Dawn E Gundersen-Rindal, Jessica B Hostetler, Luke J Tallon, Roger W Fuester, Michael C Schatz, Monica J Pedroni, Douglas W Fadrosh, Brian J Haas, Bradley S Toms, Dan Chen, Vishvanath Nene
Primary Institution: The Institute for Genomic Research, a division of J. Craig Venter Institute
Hypothesis
Selection acting on GiBV proviral sequences maintains the genetic island-like nature of the cluster of proviral genome segments.
Conclusion
The study reveals that some GiBV proviral segment sequences exist in a tandem array, while others are isolated, and that non-coding DNA in these segments is under selection pressure.
Supporting Evidence
- Eighteen of ~24 GiBV viral segment sequences are encoded by 7 non-overlapping sets of BAC clones.
- Structural and compositional analyses revealed distinct G+C and nucleotide composition between proviral segments and flanking DNA.
- Evidence for widespread selection acting on both protein-coding and non-coding DNA was found.
Takeaway
This study looks at a virus that helps wasps survive by changing how their caterpillar hosts react. It found that some parts of the virus's DNA are linked together, while others are not.
Methodology
The study involved whole genome shotgun sequencing of viral DNA from female wasps and analysis of BAC clones to identify proviral genome segments.
Limitations
The study does not clarify whether the multiple GiBV proviral loci are linked on a single wasp chromosome.
Participant Demographics
Outbred populations of Glyptapanteles indiensis were used, with a mean colony size of 400 and an average sex ratio of 7 females to 13 males.
Statistical Information
P-Value
p<0.05
Statistical Significance
p<0.05
Digital Object Identifier (DOI)
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