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Systematic Relationships among Some Anatini as Derived from Restriction-Endonuclease Analysis of a Repeated DNA Component
James M. Tuohy, Kevin P. McHugh and Siwo R. de Kloet
Vol. 109, No. 3 (Jul., 1992), pp. 465-473
Published by: American Ornithological Society
Stable URL: http://www.jstor.org/stable/4088361
Page Count: 9
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We recently isolated and cloned a highly repeated retropseudogenelike DNA sequence (RBMI) from the genome of the Red-breasted Merganser (Mergus serrator). This sequence was used to probe Southern blots of restriction-enzyme-digested DNA from members of the waterfowl tribe Anatini in order to infer phylogenetic relationships. The digested DNA of all the species studied contained major and minor RBMI-like components. Some RBMI-like components were common to all the species examined, others were only found in groups of species, and still other were specific to individual species. The Mallard (Anas platyrhynchos) and the American Black Duck (A. rubripes) could be differentiated on the basis of RBMI-probed Southern blots. Thus, the RBMI sequence can be used to distinguish very closely related species. We suggest that the Anatini consist of three major groups: the mallard-pintail group; the gadwall-wigeon group; and the blue-winged ducks. The Versicolor Teal (A. versicolor) had major elements in common with both the blue-winged ducks and the mallard-pintail group. The Baikal Teal (A. formosa) and the Marbled Teal (Marmaronetta angustirostris) do not appear to be members of any of these three groups.
The Auk © 1992 American Ornithologists' Union