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DNA AND INSECTS DNA

المؤلف:  David L. Nelson، Michael M. Cox

المصدر:  Lehninger Principles of Biochemistry

الجزء والصفحة:  226

2026-07-26

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DNA AND INSECTS DNA

 analysis is used outside forensic science to identify insect species. In the forensic sciences, this method has only recently gained interest. Dr Paul Hebert of the University of Guelph in Ontario, Canada, identified a mitochondrial gene (cytochrome c oxidase I, or COI) used in cell respiration that is common to all species but differs slightly in each one. That gene can be used to distinguish between species of animals, including insects; the project to collect information on all known species is called the Barcode of Life. DNA identification of species cannot replace traditional taxonomic methods for unknown species: What would it be compared against? But once a species is identified, species identification via DNA becomes rapid and reliable. DNA barcoding has not been adopted as a routine method for forensic entomology case work but may be in the future. Another use of DNA with insects is to extract the gut contents of maggots in the hopes that nuclear or mitochondrial DNA from the deceased can be extracted, analyzed, and compared. Not only can this potentially assist in the identification of decedents, but this approach has relevance to identifying maggots that were actually on a particular corpse—if the maggot was not on that body, then its stage of development is not relevant to estimating how long the decedent had been dead. This topic of estimating time since death is a key task of forensic entomologists.