Deviation from morphological intermediacy in interstrain hybrids of rainbow trout,Salmo gairdneri |
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| Authors: | Moira M Ferguson Roy G Danzmann |
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| Institution: | (1) Department of Zoology, University of Montana, Missoula, Montana, 59812, U.S.A.;(2) Present address: Department of Zoology, University of Guelph, Guelph, Ontario, NIG 2W1, Canada;(3) Present address: Chesapeake Bay Institute, The John Hopkins University, Shady Side, MD, 20764-0037, U.S.A. |
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| Abstract: | Synopsis Deviations from morphological intermediacy in six first generation hybrids between three hatchery strains of rainbow trout,
raised in a common environment, are reported. Hybrids have higher mean counts of four meristic characters than their maternal
parental strain in a significantly greater number of cases (18 out of 24). Furthermore, eight of eleven hybrid indices are
not intermediate. These results are discussed in reference to several mechanisms and models proposed to account for observed
responses of meristic characters to environmental and genetic influences. |
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| Keywords: | Developmental rate Genetics Inheritance Meristic Salmonidae |
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