DNA fingerprints from hypervariable mitochondrial genotypes |
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Authors: | Avise JC; Bowen BW; Lamb T |
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Institution: | Department of Genetics, University of Georgia, Athens 30602. |
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Abstract: | Conventional surveys of restriction-fragment polymorphisms in mitochondrial
DNA of menhaden fish (Brevoortia tyrannus/patronus complex) and chuckwalla
lizards (Sauromalus obesus) revealed exceptionally high levels of genetic
variation, attributable to differences in mtDNA size as well as in
restriction sites. The observed probabilities that any two randomly drawn
individuals differed detectably in mtDNA genotype were 0.998 and 0.983 in
the two species, respectively. Thus, the variable gel profiles provided
unique mtDNA "fingerprints" for most conspecific animals assayed. mtDNA
fingerprints differ from nuclear DNA fingerprints in several empirical
respects and should find special application in the genetic assessment of
maternity.
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