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  • 1
    Electronic Resource
    Electronic Resource
    Molecular Approaches to Population Biology (1994)
    Palo Alto, Calif. : Annual Reviews
    Annual Review of Ecology, Evolution, and Systematics 25 (1994), S. 45-69 
    Details
    ISSN: 0066-4162
    Source: Annual Reviews Electronic Back Volume Collection 1932-2001ff
    Topics: Biology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1146/annurev.es.25.110194.000401
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  • 2
    Electronic Resource
    Electronic Resource
    Relationships Between Life History Characteristics and Electrophoretically Detectable Genetic Variation in Plants (1979)
    Palo Alto, Calif. : Annual Reviews
    Annual Review of Ecology, Evolution, and Systematics 10 (1979), S. 173-200 
    Details
    ISSN: 0066-4162
    Source: Annual Reviews Electronic Back Volume Collection 1932-2001ff
    Topics: Biology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1146/annurev.es.10.110179.001133
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  • 3
    Electronic Resource
    Electronic Resource
    Associations between enzyme genotypes and dark respiration in perennial ryegrass, Lolium perenne L. (1987)
    Springer
    Oecologia 74 (1987), S. 335-338 
    Details
    ISSN: 1432-1939
    Keywords: Dark respiration ; Enzyme polymorphisms ; Heat stress ; Heterozygosity ; Lolium perenne
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Summary In this study, we determined whether relationships existed between dark respiration and genotype at five enzyme polymorphisms in perennial ryegrass, Lolium perenne L. Positive correlations were found between Q 10 of dark respiration and genotype at the phosphoglucomutase (PGM) and 6-phosphogluconate dehydrogenase (6PGD) loci. Plants doubly homozygous for the common allele at these loci were found to have Q 10 values 20% higher than those for double heterozygotes. In plants that were heat stressed for five consecutive days, Q 10 was found to be negatively correlated with apparent vigor after stressing. Individuals homozygous for PGM and 6PGD (with higher Q 10 values) exhibited more apparent damage following the stress than heterozygous individuals. Both PGM and 6PGD occupy positions in metabolism with regulatory potential. Although caution must be used in assigning causal relationships, the results suggest that specific forms of these enzymes are directly related to, or are correlated with, the determinants of respiratory efficiency in L. perenne.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00378926
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  • 4
    Electronic Resource
    Electronic Resource
    Primers designed to amplify a mitochondrial nad1 intron in ponderosa pine, Pinus ponderosa, limber pine, P. flexilis, and Scots pine, P. sylvestris (2000)
    Springer
    Theoretical and applied genetics 101 (2000), S. 1269-1272 
    Details
    ISSN: 1432-2242
    Keywords: Key words mtDNA ; Polymorphism ; Pinus ponderosa ; Pinus flexilis ; Pinus sylvestris
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract  The b/c intron of the mitochondrial nad1 gene, was sequenced to characterize the indel region of ponderosa pine, Pinus ponderosa. The sequence in ponderosa pine was aligned with the sequence in Scots pine, Pinus sylvestris, to design seven primers that are useful for sequencing and for revealing size variation in amplified fragments in ponderosa pine, Scots pine, and limber pine, Pinus flexilis. These primers reveal variability in all three species, and the pattern of variability within ponderosa pine is described by a preliminary survey. The indel region of ponderosa pine contains three distinct elements with lengths of 31, 32, and 34 bp.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s001220051606
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  • 5
    Electronic Resource
    Electronic Resource
    Muscle esterase variation and size variation in the sand launce Ammodytes dubius (1985)
    Springer
    Marine biology 87 (1985), S. 279-283 
    Details
    ISSN: 1432-1793
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Esterase variation detected in homogenates of muscle tissue taken from the sand launce Ammodytes dubius in April, 1970 and 1971 is described. Eight alleles were found segregating at a single locus, and the frequencies of these alleles were homogenous in population samples taken on the Emerald Bank, off Nova Scotia, Canada, in successive years. When ordered by their electrophoretic mobility, the profile of the frequencies of these alleles was unimodal and symmetric. In both of the population samples, there were significant excesses of homozygotes and deficencies of heterozygotes. There was an association between genotype and size of individuals among homozygous genotypes; individual homozygous for the most common, intermediately-migrating allele were larger than homozygotes bearing alleles with relatively fast or slow mobilities.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00397806
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  • 6
    Electronic Resource
    Electronic Resource
    Genetic control of allozymes of shikimate dehydrogenase in ponderosa pine (1981)
    Springer
    Biochemical genetics 19 (1981), S. 641-646 
    Details
    ISSN: 1573-4927
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00483997
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  • 7
    Electronic Resource
    Electronic Resource
    Habitat choice in the intertidal snail Tegula funebralis (1981)
    Springer
    Marine biology 65 (1981), S. 149-154 
    Details
    ISSN: 1432-1793
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Intraspecific variation in habitat preference was studied in the black turban snail Tegula funebralis (Adams, 1854), at two locations on the northern U.S. Pacific Coast. Studies in 1977 using a mass-marking technique showed that most snails found either above or in permanent tidepools at low tide return to their original habitats within a few days after experimental habitat reversal. This return is not due to homing behavior, but is apparently based on the recognition of ecological characteristics of the two habitats. Experiments in 1978 with individually-marked snails suggest that they prefer specific intertidal levels, and not merely above-pool or in-pool habitats. Theoretical models predict that this behavior could play a major role in the maintenance of genetic polymorphism in a species like T. funebralis, whose intertidal environment is characterized by extreme spatial heterogeneity.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00397079
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  • 8
    Electronic Resource
    Electronic Resource
    Observations on the genetic structure and mating system of ponderosa pine in the Colorado front range (1977)
    Springer
    Theoretical and applied genetics 51 (1977), S. 5-13 
    Details
    ISSN: 1432-2242
    Keywords: Selection ; Migration ; Peroxidase ; Ponderosa Pine
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Summary Variation of peroxidase enzymes is analyzed both in mature needle tissue and in open-pollinated seedling families of ponderosa pine, Pinus ponderosa, and is identified as being controlled by a single Mendelian locus. Variation at this locus, analyzed in 1, 386 individuals, is used in the analysis of population differentiation and the mating system. Significant variation of gene frequencies is detected over distances of several hundred meters, and is found to be associated with slopes of different aspects. Ponderosa pine is wind-pollinated, and an analysis of the mating system indicates that the level of outcrossing is greater than 90 %. Selection specific for different environments is evidently strong enough to overcome the homogenizing force of migration and produce population fissuring in ponderosa pine.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00306055
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  • 9
    Electronic Resource
    Electronic Resource
    The dynamic mating systems of conifers (1992)
    Springer
    New forests 6 (1992), S. 197-216 
    Details
    ISSN: 1573-5095
    Keywords: breeding systems ; allozyme variation ; natural selection
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Abstract Conifer mating systems vary among species and within species; both ecological variables and genetic variation cause mating systems to be dynamic. Within species, estimates of rates of outcrossing vary among populations, among loci, and among individuals within stands. The level of outcrossing varies with stand density, age, and the abundance of local and foreign pollen. Variation in the mating success of both males and females violates the assumption that populations are randomly mating and at equilibrium, and justifies more quantitative analyses of mating systems. Allelic frequencies in the pollen pool and in the pool of receptive female surfaces may vary through a season and among seasons, producing positively assortative mating in time. Seed and seedling viability selects against homozygotes for lethal alleles and favors heterozygous genotypes, biasing estimates of outcrossing. Particularly fruitful topics of research include the genetic consequences of polyembryony, differential male and female mating success, and associations between specific genotypes and floral phenology.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00120645
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  • 10
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    Correlation between the individual heterozygosity of parents and their offspring (1993)
    Springer Nature
    Details
    Publication Date: 1993-07-01
    Print ISSN: 0018-067X
    Electronic ISSN: 1365-2540
    Topics: Biology
    Published by Springer Nature
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