Significant differential gene duplication without ancestral tetraploidy in a genus of mexican fish |
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| Authors: | B J Turner R R Miller E M Rasch |
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| Institution: | (1) Museum of Zoology, University of Michigan, 48109 Ann Arbor, MI, USA;(2) Department of Biology, Marquette University, 53233 Milwaukee, WI, USA;(3) Present address: Department of Biology, Virginia Polytechnic Institute and State University, 24061 Blacksburg, VA, USA;(4) Present address: Department of Biophysics, College of Medicine, East Tennessee State University, 37601 Johnson City, TN, USA |
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| Abstract: | 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.Supported by NSF grants DEB76-20958 (BJT), DEB77-03257 (EMR) and DEB77-17315 (RRM). |
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