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Showing 1 to 20 of 36 for “"allozyme"”.
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Allozyme Diversity and Hybridization in Castanea Pumila (Section Balanocastanon, Fagaceae)
… this possibility, the geographic distribution of allozyme variation was examined for patterns indicative of a hybrid zone. Only one of six loci assayed was polymorphic, yielding a lower than average estimate of gene diversity (Ht=0.082). For this locus the genetic differentiation among populations …
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Y chromosome and allozyme correlates of geotaxis in selected lines of Drosophila melanogaster and their hybrids
… (PGD) at Generation 66, and only for the allozymes at Generation 93 following hybridization. Allelic differences in ADH were associated with geotactic differences, indicating that a gene near Adh (2-50.1) is correlated with geotaxis in these lines, which is consistent with previous results …
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A biosystematic study of the rare plant <i>Paronychia virginica</i> Sprengel (Caryophyllaceae) employing morphometric and allozyme analyses
… results from both the morphometric and allozyme analyses, the current author suggests recognizing two distinct subspecies, P. virginica subsp. virginica in the eastern U.S. and P. virginica subsp. scoparia in the south-central U.S. Conservation efforts should be focused on the …
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The Distribution of Genetic Variation Among Relictual Populations of Missouri Tallgrass Prairie Plants
… were used to describe the distribution of allozyme variation among five prairie preserves in Missouri for three plant species: Schizachyrium scoparius (little bluestem), which presumably reproduces in the prairie ecosystem predominantly via vegetative propagation, Ruellia humilis, which has …
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Genic identity and differentiation of Ilyodon (Cyprinodontoidea: goodeidae): morphological polymorphism and chromosomal divergence
… which have been regarded as sympatric species. Allozyme surveys of four bimodal populations indicated no significant differences in allele frequencies between the presumed species in seven to fifteen polymorphic loci, but substantial interpopulation genic differentiation. These results suggested …
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Spatial structuring in trait variation in Polyommatus icarus in a functional context
… and voltinism. These traits together with allozymes and a neutral DNA marker (AFLP) variation are studied here to understand how geographic trait variation is related to environmental variation. The approach adopted here is to study this along a latitudinal cline of temperature and …
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Population Genetic Structure of the Temperate Scleractinian Coral, Oculina Arbuscula, in Coastal Georgia
… To address this hypothesis, I combined data from allozyme electrophoresis, histocompatibility assays, and despersion of established colonies. Results indicated substantial local recruitment maintained primarily by sexual reproduction rather than asexual fragmentation. Sexually produced planulae …
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Electrophoretic and Morphological Evaluation of Stizostedion Species Collected from Lake Sakakawea, North Dakota
… staining procedures were used to analyze allozyme variation in sauger collected from three locations in Lake Sakakawea. Of the 17 enzymes examined, no genetic polymorphisms were observed. Sauger populations from the three locations were similar for 14 morphometric and eight meristic …
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Physiological, population, and genetic responses of an aquatic insect (Isonychia bicolor) to chronic mercury pollution
… on the Holston River. The relationship between allozyme genotype to survival of I. bicolor nymphs to acute mercury exposure was also tested. The probability of survival and individual times to death (TTD) were found to be significantly different among genotypes at the Glucose Phosphate Isomerase …
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Relationships Between Genetic and Ecological Variables in Nine Populations of Phlox Drummondii Hook (Niche, Allozymes, Genetic Differentiation)
… Genetic variation was quantified by examining allozyme variability at five polymorphic loci and by analysis of morphological variation among families of full and half sibs. Statistically significant heritabilities were found for 16 morphological and life history characters, as well as …
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Population structure of Atlantic herring, Clupea harengus L., in the northeast Atlantic using phenotypic and molecular approaches
… morphometries, otolith shape) and molecular (allozymes, mitochondrial DNA RFLPs, micro satellites) markers were simultaneously used to investigate the morphological and genetic structure of herring populations in the Northeast Atlantic and also to assess the relative usefulness of phenotypic …
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Panbiogeography: a cladistic approach
… reanalysis of Hafner and Nadler's (1988) allozyme data for gophers and their parasitic lice illustrates the utility of information on timing of speciation events in interpreting apparent incongruence between host and parasite cladograms. In addition the thesis contains a survey of some …
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Systematic Studies of the Orangethroat Darter, Etheostoma Spectabile, Complex (Percidae: Subgenus Oligocephalus)
… complex; and comparisons of meristic and allozyme data among the species.
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Breeding System, Heterozygosity, and Seed Germination in a Population of Missouri Bladder-Pod, Lesquerella Filiformis Rollins
… in this geographically-restricted species, allozyme genotypes for seeds produced from one generation of natural breeding were used to estimate the breeding system and to examine the fitness consequences of heterozygosity. Both multilocus and single-locus estimates of the outcrossing rate …
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Evidence For Reduced Hawkmoth Pollination in Ruellia Humilis
… by hawkmoths may be especially susceptible. Allozyme markers were used to estimate the historic and current outcrossing rates of four Missouri populations of self-compatible Ruellia humilis in order to assess whether there has been a recent reduction in hawkmoth-mediated outcrossing. The …
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A preliminary study of genetic variation within and among populations of Diaptomus leptopus (Copepoda: Calanoida) : a DNA sequence analysis of the Mitochondrial Cytochrome Oxidase I gene
… on behavioral traits, morphological traits and allozyme studies. DNA sequence analysis of the mitochondrial cytochrome oxidase I gene may also be of use to study population structure. Thus, a study investigating the genetic variation within and among seven populations, distributed from Quebec to …
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Genetic Structure and Demographic Analysis of Key deer (Odocoileus virginianus clavium)
… assumed to be genetically unique (based on one allozyme study), homogeneous, and have a female-biased population of approximately 900 deer. I used 985bp of the mitochondrial cytochrome b gene and 12 microsatellite loci to test two hypotheses: 1) if the Moser Channel is a barrier to gene flow, I …
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Phylogenetic relationship of forest spiny pocket mice (Genus Heteromys) inferred from mitochondrial and nuclear markers with implications for species boundaries
… oresterus</em>. Incorporating karyotype and allozyme data from earlier studies, I found sufficient supporting evidence to justify maintaining <em>H. goldmani</em> and <em>H. oresterus</em> as species as well as identifying four lineages as candidate species. I present a revised taxonomic …
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Hypervariable DNA markers and population structure in three fish species
… The results were compared to those of a previous allozyme survey of the same populations. Samples of <i>Morone saxatilis</i> from the Chesapeake Bay system were used to investigate the utility of hypervariable markers in the description of genetic variation of an outbred species depauperate in …
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Fine-scale genetic structure and parentage in Urocitellus beldingi
… paternity has been previously verified through allozyme analysis. Microsatellites were used to verify maternity and determine paternity. Analysis of ten litters demonstrated an average of 1 father per 1.35 pups in a litter. Sibship deduced from maternity and paternity analysis was then compared …
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