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Genetic Variation Within And Between Coho Salmon Oncorhynchus Kisutch Populations Revealed By Pooled Multilocus Dna Fingerprinting
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Book Synopsis Genetic Variation Within and Between Coho Salmon (Oncorhynchus Kisutch) Populations Revealed by Pooled Multilocus DNA Fingerprinting by : Anne Elizabeth Seinwill
Download or read book Genetic Variation Within and Between Coho Salmon (Oncorhynchus Kisutch) Populations Revealed by Pooled Multilocus DNA Fingerprinting written by Anne Elizabeth Seinwill and published by . This book was released on 1996 with total page 74 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Masters Theses in the Pure and Applied Sciences Accepted by Colleges and Universities of the United States and Canada by :
Download or read book Masters Theses in the Pure and Applied Sciences Accepted by Colleges and Universities of the United States and Canada written by and published by . This book was released on 1996 with total page 442 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis The Genetic Structure of Chinook and Coho Salmon Populations in California, with a Note on the Genetic Variability in Sturgeon (Acipenseridae). by : Devin Michael Bartley
Download or read book The Genetic Structure of Chinook and Coho Salmon Populations in California, with a Note on the Genetic Variability in Sturgeon (Acipenseridae). written by Devin Michael Bartley and published by . This book was released on 1987 with total page 432 pages. Available in PDF, EPUB and Kindle. Book excerpt: Populations of chinook, Oncorhynchus tshawytscha, and coho salmon, O. kisutch, from Northern California and four species of North American sturgeon were analyzed by horizontal starch-gel electrophoresis. The products of 53 gene loci from 27 enzyme systems were used to characterize the genetic structure of 35 groups of hatchery and wild chinook salmon. The distribution of specific alleles, cluster analysis based on genetic identities, analyses of gene flow, and gene diversity analyses indicated that groups of chinook salmon from the three major river drainages in California were genetically differentiated. The products of 45 gene loci from 21 enzyme systems were used to characterize the genetic structure of 27 groups of coho salmon. Most of the observed genetic variation was due to rare alleles occurring in only a few groups of salmon. No obvious association of specific alleles with geographic area was observed and the low level of genetic variability made patterns of genetic structure or associations among the groups of coho salmon difficult to determine. The application of biochemical-genetic analyses to the management of chinook and coho salmon fisheries was addressed. A comparison of hatchery groups of chinook and coho salmon with wild groups in the same area revealed that hatchery stocks generally reflect the genetic structure of the local populations. The genetic differentiation of chinook salmon by drainage could provide fishery scientists with a means to identify specific groups of chinook salmon. The application of this technique to manage coho salmon populations is problematic at the present given the seemingly random distribution of alleles and the low levels of genetic variability. The products of seven gene loci were used to identify hybridization between chinook and coho salmon in a collection of salmon from a tributary to the Trinity River. The implications of a group of hybrid fish in the wild were discussed in terms of genetic resource conservation and disease transmission. The products of 20 gene loci were used to characterize the genetic structure and relationship of four species of sturgeon: Acipenser transmontanus, A. medirostris, A. fulvescens, and A. brevirostrum. Fixed allelic differences existed among the four species at several gene loci and each species could be unambiguously identified by its genetic profile.
Book Synopsis Population Genetics and Conservation of Aquatic Species by : Shaokui Yi
Download or read book Population Genetics and Conservation of Aquatic Species written by Shaokui Yi and published by Frontiers Media SA. This book was released on 2023-02-01 with total page 127 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Genetic Variation in DNA of Coho Salmon from the Lower Columbia River by :
Download or read book Genetic Variation in DNA of Coho Salmon from the Lower Columbia River written by and published by . This book was released on 1993 with total page 29 pages. Available in PDF, EPUB and Kindle. Book excerpt: The goal of this project was to develop techniques to provide the information needed to determine if Lower Columbia River coho salmon represent a 'species' under the Endangered Species Act. Our report features two new nuclear DNA approaches to the improved detection of genetic variation: (1) Studies of DNA-level genetic variation for two nuclear growth hormone genes; (2) Use of arbitrary DNA primers (randomly amplified polymorphic DNA, or 'RAPD' primers) to detect variation at large numbers of nuclear genes. We used the polymerase chain reaction (PCR) to amplify variable sections (introns) of two growth hormone genes (GH-I and G/f-Z) in several salmonid species. Coho salmon had three DNA length variants for G/-I intron C. Restriction analysis and sequencing provided valuable information about the mode of evolution of these DNA sequences. We tested segregation of the variants in captive broods of coho salmon, and demonstrated that they are alleles at a single Mendelian locus. Population studies using the GH-1 alleles showed highly significant frequency differences between Lower Columbia River and Oregon Coast coho salmon, and marginal differences among stocks within these regions. These new markers are adequately defined and tested to use in coho salmon population studies of any size. The nature of the variation at GH-1 (Variable Number Tandem Repeats, or 'VNTRs') suggests that more genetic variants will be found in coho salmon from other areas. GH-2 intron C also showed length variation in coho salmon, and this variation was found to be sex-linked. Because PCR methods require minute amounts of tissue, this discovery provides a technique to determine the gender of immature coho salmon without killing them. Chinook salmon had restriction patterns and sequence divergences similar to coho salmon. Thus, we expect that sex linkage of GH-2 alleles predates the evolutionary divergence of Pacific salmon species, and that gender testing with this system will work on the entire group. Rainbow trout do not show this sex-linked variation. Genetic markers detected by DNA amplification using arbitrary 10-basepair primers (Randomly Amplified Polymorphic DNA, or 'RAPD' markers), are the newest and most promising method of assessing variation at large numbers of genetic loci. We have demonstrated the inheritance of these markers in rainbow trout, and we have found multiple variable genetic markers in coho salmon. Feasibility studies on the use of RAPDs on large salmon collections are described.
Book Synopsis Genetic Variability in Hatchery and Wild Populations of Coho Salmon Oncorhynchus Kisutch in Oregon by : Paul Gordon Olin
Download or read book Genetic Variability in Hatchery and Wild Populations of Coho Salmon Oncorhynchus Kisutch in Oregon written by Paul Gordon Olin and published by . This book was released on 1984 with total page 176 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Mitochondrial DNA Variation Within and Among Five Alaskan Populations of Coho Salmon (Oncorhynchus Kisutch) by : Benjamin Lanson Carney
Download or read book Mitochondrial DNA Variation Within and Among Five Alaskan Populations of Coho Salmon (Oncorhynchus Kisutch) written by Benjamin Lanson Carney and published by . This book was released on 1994 with total page 224 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Mitochondrial DNA Restriction Site Variation Within and Among Five Populations of Alaskan Coho Salmon (Oncorhynchus Kisutch) by : Benjamin Lanson Carney
Download or read book Mitochondrial DNA Restriction Site Variation Within and Among Five Populations of Alaskan Coho Salmon (Oncorhynchus Kisutch) written by Benjamin Lanson Carney and published by . This book was released on 1997 with total page 10 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Genetic Variation Among Coho Salmon Populations from the Kuskokwim River Region and Application to Stock-specific Harvest Estimation by : Penelope Ann Crane
Download or read book Genetic Variation Among Coho Salmon Populations from the Kuskokwim River Region and Application to Stock-specific Harvest Estimation written by Penelope Ann Crane and published by . This book was released on 2007 with total page 68 pages. Available in PDF, EPUB and Kindle. Book excerpt: Coho salmon in the study were sampled in the Kuskokwim River basin and, to the south, the Kanektok River, Arolik River, and Middle Fork Goodnews River.
Book Synopsis Genetic Variation in DNA of Coho Salmon from the Lower Columbia River by : Stephen Fobes
Download or read book Genetic Variation in DNA of Coho Salmon from the Lower Columbia River written by Stephen Fobes and published by . This book was released on 1993 with total page 25 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Canadian Journal of Zoology written by and published by . This book was released on 1998 with total page 834 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Outbreeding Depression and Inheritance in Three Generations of Geographically Distinct Southeast Alaska Coho Salmon (Oncorhynchus Kisutch) Populations by : Tyler H. Dann
Download or read book Outbreeding Depression and Inheritance in Three Generations of Geographically Distinct Southeast Alaska Coho Salmon (Oncorhynchus Kisutch) Populations written by Tyler H. Dann and published by . This book was released on 2009 with total page 172 pages. Available in PDF, EPUB and Kindle. Book excerpt: "I observed no fitness losses among F2 hybrids of three Southeast Alaska coho salmon (Oncorhynchus kisutch) populations relative to parental controls. Marine survival did not differ among groups in one generation, but was greater for hybrids than controls in another, although the power of these tests was low. Increases in fluctuating asymmetry, which can signal losses in fitness, were not observed. Line cross analyses of length suggested additive and additive plus dominance gene action, and two of three analyses suggested epistasis. In contrast, meristic characters exhibited little variability; and in most cases tests failed to reject a simple additive model. Half- and full-sib analyses provided no evidence of quantitative genetic variation for any trait although the power to detect these effects was low. Comparisons of population divergence measured by quantitative traits (Qst) and molecular markers (Fst) that length is an adaptive trait and that bilateral meristics are highly conserved. Although we did not observe losses in fitness, the power of our tests was low, the among-population differences were unique to our experiment and so results of this study should be interpreted with caution"--Leaf iii.
Book Synopsis Variation in Mitochondrial DNA and Allozymes Discriminates Early and Late Forms of Chinook Salmon (Oncorhynchus Tshawytscha) in the Kenai and Kasilof Rivers, Alaska by : Noah Swayambhu Adams
Download or read book Variation in Mitochondrial DNA and Allozymes Discriminates Early and Late Forms of Chinook Salmon (Oncorhynchus Tshawytscha) in the Kenai and Kasilof Rivers, Alaska written by Noah Swayambhu Adams and published by . This book was released on 1994 with total page 88 pages. Available in PDF, EPUB and Kindle. Book excerpt: Genetic differences between early and late forms of Alaskan chinook salmon (Oncorhynchus tshawytscha) were identified using two genetic approaches: mitochondrial DNA (mtDNA) analysis and protein electrophoresis. The study populations consisted of early- and late-run chinook salmon in each of the Kenai and Kasilof rivers in Alaska, and a single population from the Minam River, Oregon, that provided a relative scale for the differences among the Alaskan populations. Two segments of mtDNA were amplified separately using the polymerase chain reaction (PCR) and then digested with 14 to 16 restriction enzymes. Results showed that the two early runs were genetically similar to each other but different from either of the late runs. The late runs were different from each other based on the frequency of the common haplotypes. The Minam River stock shared two haplotypes with the Alaskan stocks and displayed one unique haplotype. The frequency difference in the shared haplotypes together with the presence of a unique haplotype allowed us to separate the Oregon population from those in Alaska. In the protein analysis, each of the five populations was examined at 30 allozyme loci to determine variation within and between the runs. Based on 14 polymorphic loci, Minam River chinook salmon were genetically distinct from the Alaskan populations. Within the Alaskan populations, the two early runs were most similar to each other but different from the two late runs; the two late runs were also genetically most similar to each other. Based on all loci, protein electrophoresis proved to be a useful technique to separate stocks of chinook salmon. On a locus by locus basis, however, mtDNA was more powerful. Both mtDNA and allozyme analysis suggest that chinook salmon may segregate into genetically different early and late forms within a drainage.
Book Synopsis Patterns of Natural Selection and Demography in Coastal Oregon Coho Salmon (Oncorhynchus Kisutch) Populations by : Marc Aaron Johnson
Download or read book Patterns of Natural Selection and Demography in Coastal Oregon Coho Salmon (Oncorhynchus Kisutch) Populations written by Marc Aaron Johnson and published by . This book was released on 2009 with total page 222 pages. Available in PDF, EPUB and Kindle. Book excerpt: For Pacific salmon, the evolution of local adaptations depends upon the species' propensity to return, or "home", to natal streams at time of reproduction. Pacific salmon use olfactory cues to guide homing behavior, yet little is known about the genetics of olfaction in salmon. In this study, I use putatively neutral microsatellite markers to estimate demographic parameters and describe the population genetic structure of Oregon Coastal coho salmon (Oncorhynchus kisutch). Microsatellite analyses indicated weak population structure among coho populations (overall [theta] = 0.021), modulated by moderate levels of migration (straying). Allelic richness was higher in wild populations than both hatchery populations and wild populations from lake dominated systems. The Coos and Nehalem river populations appeared to be primary migrant sources, possibly elevating allelic richness for central coast populations. I then used genomic sequence data from nine species of salmon and trout to infer the evolutionary history for eight olfactory receptor genes, representing two major gene classes (main olfactory receptors and ORAs). Through a maximum likelihood based analysis of site-specific, non-synonymous to synonymous nucleotide substitution rates, I found strong evidence for positive selection having influenced the diversification of four paralogous main olfactory receptor genes. Main olfactory receptor orthologues appeared highly conserved among species, yet site-specific positive selection may be affecting interspecific divergence of an ORA gene in salmonids. Finally, I used molecular markers linked to olfactory receptor genes to test for a signal of selection among coho salmon populations from different rivers. By examining interlocus variance of F[subscript]ST, I found evidence for directional selection on an olfactory receptor gene-linked marker in coho salmon populations. Pairwise [theta] values calculated from gene-linked markers were nearly an order of magnitude greater than observed for putatively neutral microsatellites.
Book Synopsis Biochemical Genetic Variation Among Selected Populations of Chinook Salmon (Oncorhynchus Tshawytscha) in Oregon and Washington by : Anne Christine Kristiansson
Download or read book Biochemical Genetic Variation Among Selected Populations of Chinook Salmon (Oncorhynchus Tshawytscha) in Oregon and Washington written by Anne Christine Kristiansson and published by . This book was released on 1975 with total page 58 pages. Available in PDF, EPUB and Kindle. Book excerpt: Biochemical variation in 12 different chinook populations, sampled from 10 hatcheries along the Columbia River and the Oregon coast, was studied with starch gel electrophoresis. An index was used to describe the genetic differences between pairs of populations. Differences were observed between spring and fall chinook and between Columbia River and Oregon coastal populations. Variation in inbreeding coefficients, calculated at four polymorphic loci, indicated that natural selection may alter the frequency of certain phenotypes.
Book Synopsis Current Status of Genetic Studies of Coho Salmon from Southcentral Alaska and Evaluations for Mixed Stock Analysis in Cook Inlet by : Andrew W. Barclay
Download or read book Current Status of Genetic Studies of Coho Salmon from Southcentral Alaska and Evaluations for Mixed Stock Analysis in Cook Inlet written by Andrew W. Barclay and published by . This book was released on 2017 with total page 47 pages. Available in PDF, EPUB and Kindle. Book excerpt: This report describes the current status of genetic studies for coho salmon in Southcentral Alaska and initial evaluations for mixed-stock analysis (MSA) in Cook Inlet. Coho salmon are harvested in commercial fisheries in Upper Cook Inlet, Alaska, with an average annual harvest of 171,273 fish (2005-2014). Harvests often occur in areas where stocks intermingle, so the exploitation and productivity of individual stocks are not well known. This lack of knowledge hinders fishery management based on the sustained yield principle. Mixed-stock analysis has been used to estimate stock compositions of fishery mixtures in coho salmon elsewhere in the Pacific Northwest; however, only limited baseline existed for Cook Inlet. Within Cook Inlet, we examined a baseline of 84 populations for 86 single nucleotide polymorphism markers to examine population structure and test for potential reporting groups (stocks). From the southern edge of the Kenai Peninsula, we analyzed 3 populations to investigate the genetic legacy of stocking programs in the area. Population structure indicated that populations generally cluster by drainage, with the most genetically distinct populations in the more southerly drainages and in the upper reaches of the larger drainages. Testing of potential reporting groups revealed 7 groups with adequate genetic divergence to meet the criteria for reporting groups. Due to the sparse representation of collections in the baseline for the Yentna River drainage, additional representation within this drainage would be prudent before using it as its own reporting group in MSA. The data presented in this report will allow for additional baseline evaluation tests tailored for specific MSA study objectives pertinent to Cook Inlet mixed-stock fisheries in the future. The 3 populations from the southern edge of the Kenai Peninsula were most similar to each other, but divergent from Cook Inlet populations, suggesting little genetic introgression from stocking programs.
Book Synopsis Production of All-female Populations of Coho Salmon, Oncorhynchus Kisutch, Using Y-chromosomal DNA Markers by :
Download or read book Production of All-female Populations of Coho Salmon, Oncorhynchus Kisutch, Using Y-chromosomal DNA Markers written by and published by . This book was released on 2009 with total page 4 pages. Available in PDF, EPUB and Kindle. Book excerpt:
