Jukka Vuorinen - Academia.edu (original) (raw)

Papers by Jukka Vuorinen

Research paper thumbnail of Genetic Resources of Atlantic Salmon (Salmo Salar L.) in Teno and Näätämö Rivers, Northernmost Europe

Research paper thumbnail of Morphological and genetic description of the whitefish (Coregonus lavaretus L.) population inhabiting Pomeranian Bay (Poland)

Research paper thumbnail of Inheritance of RAPD markers and detection of interspecific hybridization with brown trout and Atlantic salmon

Research paper thumbnail of Electrophoretic variation in six rainbow trout strains

Research paper thumbnail of Flandrian pollen deposition in Lake Pappilanlampi, eastern Finland

Research paper thumbnail of Genetic comparisons of New and Old World coregonid fishes

Journal of Fish …

It is also possible that your web browser is not configured or not able to display style sheets. ... more It is also possible that your web browser is not configured or not able to display style sheets. In this case, although the visual presentation will be degraded, the site should continue to be functional. We recommend using the latest version of Microsoft or Mozilla web browser to ...

Research paper thumbnail of Genetic evidence for reproductive isolation and multiple origins of sympatric trophic ecotypes of whitefish (Coregonus)

Research paper thumbnail of Genetic changes in a vendace, Coregonus albula, population 92 years after introduction

Journal of Fish Biology, 1991

Research paper thumbnail of Genetic Divergence of Anadromous and Nonanadromous Atlantic Salmon ( Salmo salar ) in the River Namsen, Norway

Canadian Journal of Fisheries and Aquatic Sciences, 1989

Anadromous and nonanadromous Atlantic salmon, Salmo salar, coexist in the River Namsen in Norway.... more Anadromous and nonanadromous Atlantic salmon, Salmo salar, coexist in the River Namsen in Norway. We studied genetic divergence between these two life history types by using electrophoretic data from 38 protein loci. Although allele frequencies differed significantly between the types at four loci no fixed allele frequency difference was observed. Nei's genetic distance between the life history types, however, was 0.01 a relatively high value for Atlantic salmon populations. The genetic differences observed between anadromous and nonanadromous salmon accounted for 18.3% of the total gene diversity. The five nonanadromous salmon samples formed two genetically different groups corresponding to the upper and lower ranges of the nonanadromous salmon in the river. The average observed heterozygosity was 3.1% for anadromous and 1.0% for nonanadromous salmon. The low heterozygosity in nonanadromous salmon probably reflects a strong founder effect. Stockings of large numbers of anadromous salmon fry to the upper reaches of the River Namsen have caused no detectable hybridization with nonanadromous salmon. Also downstream migrating nonanadromous salmon have apparently not made any important genetic contribution to the anadromous fish.

Research paper thumbnail of Flandrian Pollen Deposition in Lake Pappilanlampi, Eastern Finland

Research paper thumbnail of Duplicate loci for supernatant and mitochondrial malic enzymes in vendace, Coregonus albula (L.)

Comparative biochemistry and physiology. B, Comparative biochemistry, 1984

There is electrophoretic variation in the vendace (Coregonus albula L.) supernatant malic enzyme ... more There is electrophoretic variation in the vendace (Coregonus albula L.) supernatant malic enzyme (MEs). This is the first observed case of variation of this enzyme in salmonids. The phenotypic distribution among 33 populations studied indicates, that both supernatant and mitochondrial (MEm) malic enzymes are encoded by a duplicate pair of loci, Me-(1,2) then represent the mitochondrial and Me-(3,4) the supernatant form of the enzyme. Both pairs seem to contain one fixed and one variable locus. At both variable loci, Me-2 and Me-4, four alleles were found segregating and their products combine as tetramers within, but not between pairs. At Me-4 extensive between population heterogeneity was observed.

Research paper thumbnail of Reduction of genetic variability in a hatchery stock of brown trout, Salmo trutta L

Journal of Fish Biology, 1984

Research paper thumbnail of Genetic changes in a vendace Covegonus albula (L.) population, 92 years after introduction

Journal of Fish Biology, 1991

ABSTRACT

Research paper thumbnail of Long-term stability of allozyme frequencies in a wood lemming, Myopus schisticolor, population with a biased sex ratio and density fluctuations

Heredity, 2005

Wood lemming (Myopus schisticolor) populations are characterized by female biased sex ratios and ... more Wood lemming (Myopus schisticolor) populations are characterized by female biased sex ratios and cyclic variations in population size. Both of these characteristics are assumed to reduce genetic variation and thus affect the evolutionary adaptation of the species. We addressed these questions by studying the genetic structure of a wood lemming population from eastern Finland by isozyme markers during a 21-year period, which corresponds to 40-50 generations. Contingency tests showed that genotypic proportions conformed to Hardy-Weinberg equilibrium in each of the four sampling years. Among the temporal replicates, allele frequencies differed most by 0.14 and were not significant. Genetic variation was also stable and fairly high with a mean observed heterozygosity of H = 0.057. Variability in the Heinavesi population was higher than previously reported in wood lemming. The difference was mainly caused by variation at a phosphoglucomutase locus that was monomorphic in earlier studies. Significant linkage disequilibrium was observed in three of the comparisons but the disequilibrium did not appear consistently in all years. This pattern was also evidenced by the variance components, which indicated that selection favoured for specific allele pairs only in few subsamples.

Research paper thumbnail of Electrophoretic expression of genetic variation and duplicate gene activity in vendace, Coregonus albula (Salmonidae)

Research paper thumbnail of Genetic differentiation in Coregonus albula (L.) (Salmonidae) populations in Finland

Research paper thumbnail of Inheritance and joint segregation of biochemical loci in European whitefish, genus Coregonus

Hereditas, 2008

ABSTRACT Crosses were made with whitefish of Coregonus lavaretus complex and vendace Coregonus al... more ABSTRACT Crosses were made with whitefish of Coregonus lavaretus complex and vendace Coregonus albula L. to establish the genetic basis of variation at enzyme loci. The alleles of Gpi-2, Gpi-4, Ldh-1, Mdh-2, Mdh-3, 4 and Pgm-2 were found to segregate in a simple Mendelian fashion in whitefish. Ck-1 and Mdh-3, 4 were found to segregate normally in vendace. The results of 10 cases of pairwise segregation between these loci are presented. All pairs revealed random assortment except Gpi-4 with Ldh-1, which showed almost complete linkage.

Research paper thumbnail of A karyotype study of vendace, Coregonus albula (Pisces, Coregoninae)*

Research paper thumbnail of Host Preference and Allozyme Differentiation in Shoot Galling Sawfly, Euura atra

Research paper thumbnail of Electrophoretic Identification of Atlantic Salmon ( Salmo salar ), Brown Trout ( S . trutta ), and Their Hybrids

Canadian Journal of Fisheries and Aquatic Sciences, 1984

We studied 14 enzyme systems of Atlantic salmon (Salmo salar), brown trout (S. trutta), and their... more We studied 14 enzyme systems of Atlantic salmon (Salmo salar), brown trout (S. trutta), and their F1 hybrids. Five enzymes, namely glucosephosphate isomerase, malic enzyme, phosphoglucomutase, superoxide dismutase, and xanthine dehydrogenase, were diagnostic in providing reliable separation of the species and their hybrids. The most anodal locus of glucosephosphate isomerase exhibited adequate activity also in adipose fin biopsies, thus allowing the identification of live fish.

Research paper thumbnail of Genetic Resources of Atlantic Salmon (Salmo Salar L.) in Teno and Näätämö Rivers, Northernmost Europe

Research paper thumbnail of Morphological and genetic description of the whitefish (Coregonus lavaretus L.) population inhabiting Pomeranian Bay (Poland)

Research paper thumbnail of Inheritance of RAPD markers and detection of interspecific hybridization with brown trout and Atlantic salmon

Research paper thumbnail of Electrophoretic variation in six rainbow trout strains

Research paper thumbnail of Flandrian pollen deposition in Lake Pappilanlampi, eastern Finland

Research paper thumbnail of Genetic comparisons of New and Old World coregonid fishes

Journal of Fish …

It is also possible that your web browser is not configured or not able to display style sheets. ... more It is also possible that your web browser is not configured or not able to display style sheets. In this case, although the visual presentation will be degraded, the site should continue to be functional. We recommend using the latest version of Microsoft or Mozilla web browser to ...

Research paper thumbnail of Genetic evidence for reproductive isolation and multiple origins of sympatric trophic ecotypes of whitefish (Coregonus)

Research paper thumbnail of Genetic changes in a vendace, Coregonus albula, population 92 years after introduction

Journal of Fish Biology, 1991

Research paper thumbnail of Genetic Divergence of Anadromous and Nonanadromous Atlantic Salmon ( Salmo salar ) in the River Namsen, Norway

Canadian Journal of Fisheries and Aquatic Sciences, 1989

Anadromous and nonanadromous Atlantic salmon, Salmo salar, coexist in the River Namsen in Norway.... more Anadromous and nonanadromous Atlantic salmon, Salmo salar, coexist in the River Namsen in Norway. We studied genetic divergence between these two life history types by using electrophoretic data from 38 protein loci. Although allele frequencies differed significantly between the types at four loci no fixed allele frequency difference was observed. Nei's genetic distance between the life history types, however, was 0.01 a relatively high value for Atlantic salmon populations. The genetic differences observed between anadromous and nonanadromous salmon accounted for 18.3% of the total gene diversity. The five nonanadromous salmon samples formed two genetically different groups corresponding to the upper and lower ranges of the nonanadromous salmon in the river. The average observed heterozygosity was 3.1% for anadromous and 1.0% for nonanadromous salmon. The low heterozygosity in nonanadromous salmon probably reflects a strong founder effect. Stockings of large numbers of anadromous salmon fry to the upper reaches of the River Namsen have caused no detectable hybridization with nonanadromous salmon. Also downstream migrating nonanadromous salmon have apparently not made any important genetic contribution to the anadromous fish.

Research paper thumbnail of Flandrian Pollen Deposition in Lake Pappilanlampi, Eastern Finland

Research paper thumbnail of Duplicate loci for supernatant and mitochondrial malic enzymes in vendace, Coregonus albula (L.)

Comparative biochemistry and physiology. B, Comparative biochemistry, 1984

There is electrophoretic variation in the vendace (Coregonus albula L.) supernatant malic enzyme ... more There is electrophoretic variation in the vendace (Coregonus albula L.) supernatant malic enzyme (MEs). This is the first observed case of variation of this enzyme in salmonids. The phenotypic distribution among 33 populations studied indicates, that both supernatant and mitochondrial (MEm) malic enzymes are encoded by a duplicate pair of loci, Me-(1,2) then represent the mitochondrial and Me-(3,4) the supernatant form of the enzyme. Both pairs seem to contain one fixed and one variable locus. At both variable loci, Me-2 and Me-4, four alleles were found segregating and their products combine as tetramers within, but not between pairs. At Me-4 extensive between population heterogeneity was observed.

Research paper thumbnail of Reduction of genetic variability in a hatchery stock of brown trout, Salmo trutta L

Journal of Fish Biology, 1984

Research paper thumbnail of Genetic changes in a vendace Covegonus albula (L.) population, 92 years after introduction

Journal of Fish Biology, 1991

ABSTRACT

Research paper thumbnail of Long-term stability of allozyme frequencies in a wood lemming, Myopus schisticolor, population with a biased sex ratio and density fluctuations

Heredity, 2005

Wood lemming (Myopus schisticolor) populations are characterized by female biased sex ratios and ... more Wood lemming (Myopus schisticolor) populations are characterized by female biased sex ratios and cyclic variations in population size. Both of these characteristics are assumed to reduce genetic variation and thus affect the evolutionary adaptation of the species. We addressed these questions by studying the genetic structure of a wood lemming population from eastern Finland by isozyme markers during a 21-year period, which corresponds to 40-50 generations. Contingency tests showed that genotypic proportions conformed to Hardy-Weinberg equilibrium in each of the four sampling years. Among the temporal replicates, allele frequencies differed most by 0.14 and were not significant. Genetic variation was also stable and fairly high with a mean observed heterozygosity of H = 0.057. Variability in the Heinavesi population was higher than previously reported in wood lemming. The difference was mainly caused by variation at a phosphoglucomutase locus that was monomorphic in earlier studies. Significant linkage disequilibrium was observed in three of the comparisons but the disequilibrium did not appear consistently in all years. This pattern was also evidenced by the variance components, which indicated that selection favoured for specific allele pairs only in few subsamples.

Research paper thumbnail of Electrophoretic expression of genetic variation and duplicate gene activity in vendace, Coregonus albula (Salmonidae)

Research paper thumbnail of Genetic differentiation in Coregonus albula (L.) (Salmonidae) populations in Finland

Research paper thumbnail of Inheritance and joint segregation of biochemical loci in European whitefish, genus Coregonus

Hereditas, 2008

ABSTRACT Crosses were made with whitefish of Coregonus lavaretus complex and vendace Coregonus al... more ABSTRACT Crosses were made with whitefish of Coregonus lavaretus complex and vendace Coregonus albula L. to establish the genetic basis of variation at enzyme loci. The alleles of Gpi-2, Gpi-4, Ldh-1, Mdh-2, Mdh-3, 4 and Pgm-2 were found to segregate in a simple Mendelian fashion in whitefish. Ck-1 and Mdh-3, 4 were found to segregate normally in vendace. The results of 10 cases of pairwise segregation between these loci are presented. All pairs revealed random assortment except Gpi-4 with Ldh-1, which showed almost complete linkage.

Research paper thumbnail of A karyotype study of vendace, Coregonus albula (Pisces, Coregoninae)*

Research paper thumbnail of Host Preference and Allozyme Differentiation in Shoot Galling Sawfly, Euura atra

Research paper thumbnail of Electrophoretic Identification of Atlantic Salmon ( Salmo salar ), Brown Trout ( S . trutta ), and Their Hybrids

Canadian Journal of Fisheries and Aquatic Sciences, 1984

We studied 14 enzyme systems of Atlantic salmon (Salmo salar), brown trout (S. trutta), and their... more We studied 14 enzyme systems of Atlantic salmon (Salmo salar), brown trout (S. trutta), and their F1 hybrids. Five enzymes, namely glucosephosphate isomerase, malic enzyme, phosphoglucomutase, superoxide dismutase, and xanthine dehydrogenase, were diagnostic in providing reliable separation of the species and their hybrids. The most anodal locus of glucosephosphate isomerase exhibited adequate activity also in adipose fin biopsies, thus allowing the identification of live fish.