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The Journal of Heredity 1986:77(6):399-402
© 1986 The American Genetic Association 77:399-402

research-article

Gene mapping of isozyme loci in chum salmon

James E. Seeb, and Lisa Wishard Seeb

The authors are affiliated, respectively, with the School of Fisheries, University of Washington, Seattle, WA 98195; and the Department of Biological Sciences, University of Idaho, Moscow, ID 83843. This research was supported by Washington Sea Grant College Program grant R/A-31. The authors would like to thank Gary Thorgaard and Mike Moody for their guidance during this study and Bill Hopley of the Washington Department of Fisheries for making the gametes available.

Dr. James E. Seeb's current address: Department of Biological Sciences, University of Idaho, Moscow, ID 83843.

Abstract

Recombination values were used to calculate the gene-centromere map distances for four electrophoretically detected loci, Aat3, Idh 1, Idh4, and MpI, in chum salmon (Oncorhynchus keta). We also report the results from 39 palrwise examinations for joint segregation for 10 loci in nine testcross families. Only two loci assorted nonrandomly—either Aat1 or Aat2 with Gpt. Gene-centromere distances for Aat3 and Mpi differed significantly from those reported previously for rainbow trout (Salmo gairdneri), a closely related species. This difference indicates either the presence of chromosome rearrangements or a different rate of recombination between the species. These results contrast with the conservation of linkage distances previously reported within and between other salmonid genera.


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