Allozyme Variation in Two Great Smoky Mountain Endemics: Glyceria nubigena and Rugelia nudicaulis

Genetic diversity at 35 allozyme loci was surveyed in Lacerta derjugini (3 populations) and L. praticola (2 populations). Indices of variability were consistent with those found in other Caucasian Lacerta. There was little genetic substructuring between two populations of L. praticola despite considerable geographic separation. Conversely, populations of L. derjugini in close proximity to one another exhibited considerable substructuring.

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Allozyme variation and an estimate of the inbreeding coefficient in the coffee berry borer, Hypothenemus hampei (Coleoptera: Scolytidae)

Bulletin of Entomological Research ◽

10.1017/s000748530005197x ◽

1995 ◽

Vol 85 (1) ◽

pp. 21-28 ◽

Cited By ~ 9

Author(s):

Philippe Borsa ◽

D. Pierre Gingerich

Keyword(s):

Genetic Diversity ◽

Population Structure ◽

Population Genetic ◽

New Caledonia ◽

Allozyme Variation ◽

Inbreeding Coefficient ◽

Hypothenemus Hampei ◽

Coffee Berry ◽

Biological Features ◽

High Degree

AbstractSeven presumed Mendelian enzyme loci (Est-2, Est-3, Gpi, Idh-l, Idh-2, Mdh-2 and Mpi) were characterized and tested for polymorphism in coffee berry borers, Hypothenemus hampei (Ferrari), sampled in Côte d′Ivoire, Mexico and New Caledonia. The average genetic diversity was H = 0.080. Two loci, Mdh-2 and Mpi were polymorphic, and thus usable as genetic markers. The population structure of H. hampei was analysed using Weir & Cockerham's estimators of Wright's F-statistics. A high degree of inbreeding (f = 0.298) characterized the elementary geographic sampling unit, the coffee field. The estimate of gene flow between fields within a country was Nm = 10.6 and that between countries was Nm = 2. The population genetic structure in H. hampei could be related to its known population biological features and history.

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POPULATION GENETICS OF ALLOZYME VARIATION IN NEUROSPORA INTERMEDIA

Genetics ◽

10.1093/genetics/80.4.785 ◽

1975 ◽

Vol 80 (4) ◽

pp. 785-805

Author(s):

P T Spieth

Keyword(s):

Genetic Variation ◽

Vegetative Reproduction ◽

Vascular Plant ◽

Natural Populations ◽

Allozyme Variation ◽

Regular Feature ◽

Local Populations ◽

Neurospora Intermedia ◽

Pattern Of Variation ◽

High Level

ABSTRACT Electrophoretically detectable variation in the fungus Neurospora intermedia has been surveyed among isolates from natural populations in Malaya, Papua, Australia and Florida. The principal result is a pattern of genetic variation within and between populations that is qualitatively no different than the well documented patterns for Drosophila and humans. In particular, there is a high level of genetic variation, the majority of which occurs at the level of local populations. Evidence is presented which argues that N. intermedia has a population structure analogous to that of an annual vascular plant with a high level of vegetative reproduction. Sexual reproduction appears to be a regular feature in the biology of the species. Substantial heterokaryon function seems unlikely in natural populations of N. intermedia. Theoretical considerations concerning the mechanisms underlying the observed pattern of variation most likely should be consistent with haploid selection theory. The implications of this constraint upon the theory are discussed in detail, leading to the presentation of a model based upon the concept of environmental heterogeneity. The essence of the model, which is equally applicable to haploid and diploid situations, is a shifting distribution of multiple adaptive niches among local populations such that a given population has a small net selective pressure in favor of one allele or another, depending upon its particular distribution of niches. Gene flow among neighboring populations with differing net selective pressures is postulated as the principal factor underlying intrapopulational allozyme variation.

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Phylogenetic relationships of the Pomacanthidae (Pisces: Teleostei) inferred from allozyme variation

Journal of Zoology ◽

10.1111/j.1469-7998.1998.tb00150.x ◽

1998 ◽

Vol 246 (2) ◽

pp. 215-231 ◽

Cited By ~ 14

Author(s):

K. C. Chung ◽

N. Y. S. Woo

Keyword(s):

Phylogenetic Relationships ◽

Allozyme Variation

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GENETIC DIFFERENTIATION BETWEEN GEOGRAPHICALLY DISTANT POPULATIONS OF DROSOPHILA MELANOGASTER

Genetics ◽

10.1093/genetics/101.2.235 ◽

1982 ◽

Vol 101 (2) ◽

pp. 235-256

Author(s):

Rama S Singh ◽

Donal A Hickey ◽

Jean David

Keyword(s):

Drosophila Melanogaster ◽

Genetic Differentiation ◽

Gene Frequency ◽

Natural Populations ◽

Allozyme Variation ◽

Clinal Variation ◽

Significant Genetic Differentiation ◽

African Populations ◽

Latitudinal Clines ◽

North And South

ABSTRACT We have studied allozyme variation at 26 gene loci in nine populations of Drosophila melanogaster originating on five different continents. The distant populations show significant genetic differentiation. However, only half of the loci studied have contributed to this differentiation; the other half show identical patterns in all populations. The genetic differentiation in North American, European and African populations is correlated with the major climatic differences between north and south. These differences arise mainly from seven loci that show gene-frequency patterns suggestive of latitudinal clines in allele frequencies. The clinal variation is such that subtropical populations are more heterozygous than temperate populations. These results are discussed in relation to the selectionist and neutralist hypotheses of genetic variation in natural populations.

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