Summary
A comparison of the protein products of 20–25 structural gene loci among the known species of the goodeid fish genusSkiffia suggests that at least 4 loci (16–20%) have undergone species-specific duplications (or, in 1 case, apparent loss) during the evolution of the genus. The species are clearly diploids, and the data therefore indicate that even a large proportion of differentially duplicated loci within a group of related fish species is not critical evidence of common tetraploid ancestry. Differential duplication of structural gene loci may be an important component of the genetic differences that separate congeneric conventional diploid species.
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Supported by NSF grants DEB76-20958 (BJT), DEB77-03257 (EMR) and DEB77-17315 (RRM).
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Turner, B.J., Miller, R.R. & Rasch, E.M. Significant differential gene duplication without ancestral tetraploidy in a genus of mexican fish. Experientia 36, 927–930 (1980). https://doi.org/10.1007/BF01953797
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DOI: https://doi.org/10.1007/BF01953797