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Molecular Biology and Evolution, Vol 6, 331-341, Copyright © 1989 by Society for Molecular Biology and Evolution

ORIGINAL ARTICLE

Rates of single-copy DNA evolution in phalangeriform marsupials

MS Springer and JA Kirsch
Department of Biology, University of California, Riverside.

DNA/DNA hybridization was used to investigate the relationships of taxa representing the phalangeriform marsupial families Acrobatidae, Burramyidae, Macropodidae, Petauridae, Phalangeridae, and Pseudocheiridae and (as an outgroup) the bandicoot family Peramelidae. In the course of this, a marked rate slowdown was noted in the burramyid lineage represented by Cercartetus caudatus; ANOVA (with Tukey's test) and F-ratio tests of both corrected and uncorrected data matrices confirmed this rate disparity. As burramyids are small, short- generation-time phalangeriforms, these data present a striking counterexample to the common view that rates of change in DNA sequences are inversely correlated with generation time.
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