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  • 1
    Electronic Resource
    Electronic Resource
    Absence of developmental incompatibility in hybrids between rainbow trout and two subspecies of cutthroat trout (1985)
    Springer
    Biochemical genetics 23 (1985), S. 557-570 
    Details
    ISSN: 1573-4927
    Keywords: interspecific hybrids ; fish ; development ; gene regulation ; rainbow trout ; cutthroat trout
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Chemistry and Pharmacology
    Notes: Abstract We examined the developmental rate of hybrids between rainbow trout (Salmo gairdneri) and two subspecies of cutthroat trout: westslope cutthroat trout (Salmo clarki lewisi) and Yellowstone cutthroat trout (Salmo clarki bouvieri). These taxa show considerable genetic divergence at 42 structural loci encoding enzymes; the mean Nei's d between the rainbow trout and the two species of cutthroat trout is 0.22. We used four measures of developmental rate: time of hatching and yolk resorption, rate of increase in activity of four enzymes, and time of initial detection of seven isozyme loci. The two cutthroat trout subspecies reached hatching and yolk resorption earlier than rainbow trout. Cutthroat trout had higher relative enzyme activities than rainbow trout from deposition of eye pigment to hatching. There was no difference in the rate of increase in enzyme activity or time of initial expression of these loci between these species. Hybrids showed developmental rates intermediate or similar to that of the parental species using all measures. Our results indicate an absence of regulatory and developmental incompatibility between these taxa.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00504290
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  • 2
    Electronic Resource
    Electronic Resource
    Deviation from morphological intermediacy in interstrain hybrids of rainbow trout, Salmo gairdneri (1987)
    Springer
    Environmental biology of fishes 18 (1987), S. 249-256 
    Details
    ISSN: 1573-5133
    Keywords: Developmental rate ; Genetics ; Inheritance ; Meristic ; Salmonidae
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: 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.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00004878
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    Social grouping and genetic variation in common shiners, Notropis cornutus (Pisces, Cyprinidae) (1981)
    Springer
    Environmental biology of fishes 6 (1981), S. 357-360 
    Details
    ISSN: 1573-5133
    Keywords: Behaviour ; Esterase ; Evolution ; Genetics ; Isozymes ; Stock structure ; Schools ; Starch gel
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Synopsis Heterogeneous gene frequencies of Est-1 across groups ofNotropis cornutus provide evidence of behaviourally imposed restrictions on stock structuring. Positive fixation indices (F1S = 0.056 and F1T = 0.085) were reflected by a deficiency of heterozygotes for pooled groups. The degree of subdivision ofN. cornutus stocks cannot be evaluated with the present evidence. but it is likely that their schooling behaviour is associated with significant genotypic structuring of the species.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00005765
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  • 4
    Electronic Resource
    Electronic Resource
    Allelic differences in initial expression of paternal alleles at an isocitrate dehydrogenase locus in rainbow trout (Salmo gairdneri) (1984)
    Chichester [u.a.] : Wiley-Blackwell
    Developmental Genetics 5 (1984), S. 117-127 
    Details
    ISSN: 0192-253X
    Keywords: temporal-regualatory variation ; isocitrate dehydrogenase ; rainbow trout ; Salmo gairdneri ; Life and Medical Sciences ; Genetics
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Biology
    Notes: We examined a temporal series of embryos from 14 full-sib families of rainbow trout with starch gel electrophoresis to determine the time of initial detection of enzyme produced by ldh-3. Maternal enzyme was detected in unfertilized eggs, whereas paternal alleles showed evidence of initial expression after gastrulation and epiboly. Two alleles, 40 and 71, were expressed synchronously several days before the 114 allele. Measurement of enzyme activity by spectrophotometric analysis and serial dilution supported these observations. The degree of delay of expression of the 114 allele between families was coupled with other estimates of developmental rate. These data suggest the existence of allelic variation at a cis-acting genetic element controlling the pattern of ontogenetic expression of structural alleles at Idh-3.
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/dvg.1020050302
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    Paper (German National Licenses)
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