scholarly journals Microsatellite polymorphism and genetic differentiation of different populations screened from genome survey sequencing in red-tail catfish (Hemibagrus wyckioides)

2021 ◽  
Vol 19 ◽  
pp. 100614
Author(s):  
Yu-Lin Zhou ◽  
Jun-Jie Wu ◽  
Zhong-Wei Wang ◽  
Guang-Hua Li ◽  
Li Zhou ◽  
...  
Keyword(s):  
Genetic Differentiation ◽  
Microsatellite Polymorphism ◽  
Genome Survey ◽  
Different Populations ◽  
Genome Survey Sequencing

scholarly journals STATISTICAL STUDIES ON PROTEIN POLYMORPHISM IN NATURAL POPULATIONS II. GENE DIFFERENTIATION BETWEEN POPULATIONS

Genetics ◽  
1978 ◽  
Vol 88 (2) ◽  
pp. 367-390
Author(s):  
Ranajit Chakraborty ◽  
Paul A Fuerst ◽  
Masatoshi Nei
Keyword(s):  
Genetic Differentiation ◽  
Natural Populations ◽  
Drift Theory ◽  
Alternative Hypotheses ◽  
Mean And Variance ◽  
Statistical Studies ◽  
Different Populations ◽  
Using Data ◽  
Almost All ◽  
Good Agreement

ABSTRACT With the aim of testing the validity of the mutation-drift hypothesis, we examined the pattern of genetic differentiation between populations by using data from Drosophila, fishes, reptiles, and mammals. The observed relationship between genetic identity and correlation of heterozygosities of different populations or species was generally in good agreement with the theoretical expectations from the mutation-drift theory, when the variation in mutation rate among loci was taken into account. In some species of Drosophila, however, the correlation was unduly high. The relationship between the mean and variance of genetic distance was also in good agreement with the theoretical prediction in almost all organisms. We noted that both the distribution of heterozygosity within species and the pattern of genetic differentiation between species can be explained by the same set of genetic parameters in each group of organisms. Alternative hypotheses for explaining these observations are discussed.

scholarly journals MICROSATELLITE POLYMORPHISM WITHIN TWO LAKE BAIKAL OILFISH SPECIES (COMEPHORUS LACEPEDE, 1801)

2007 ◽  
Vol 5 (2) ◽  
pp. 50-57 ◽  
Author(s):  
Veronika I Teterina ◽  
Lubov V Sukhanova ◽  
Sergey V Kirilchik
Keyword(s):  
Genetic Polymorphism ◽  
Genetic Differentiation ◽  
Lake Baikal ◽  
Microsatellite Loci ◽  
Passive Transfer ◽  
Microsatellite Analysis ◽  
Microsatellite Polymorphism ◽  
Baikal Lake ◽  
Water Currents ◽  
Cottus Gobio

Intraspecific genetic polymorphism of a Baikal Lake endemic, big Baikal oilfish (Comephorus baicalensis Pallas, 1776), was evaluated based on microsatellite analysis. The obtained results have compared to the results received earlier for a little Baikal oilfish (C. dybowski Korotneff, 1905). Six microsatellite loci designed for the European sculpin, Cottus gobio, were used. Big Baikal oilfish samples were tested from the three Baikal trenches (southern, middle, northern). Average values of F<sub>ST</sub> and R<sub>ST</sub>indexes between the samples did not exceed 0,02 that point to weak intraspecific genetic differentiation. Big Baikal oilfish had the smaller allele variety, the greater deficit of heterozygotes and presence of low-molecular alleles in comparison with little Baikal oilfish. The values of genetic differentiation were equaled F<sub>ST</sub> = 0,138 and R<sub>ST</sub> = 0,244 for all loci between cumulative samples of little and big Baikal oilfish. Analysis of microsatellite polymorphism has showed that both a big and little Baikal oilfishes are represented by single populations. The factor promoting panmixia within the Baikal oilfish species is apparently a passive transfer of juvenile and adult fishes by water currents.

Gene discovery in Plasmodium chabaudi by genome survey sequencing

2001 ◽  
Vol 113 (2) ◽  
pp. 251-260 ◽  
Author(s):  
Christoph S. Janssen ◽  
Michael P. Barrett ◽  
Daniel Lawson ◽  
Michael A. Quail ◽  
David Harris ◽  
...  
Keyword(s):  
Gene Discovery ◽  
Plasmodium Chabaudi ◽  
Genome Survey ◽  
Genome Survey Sequencing

scholarly journals GENE FLOW AND GENETIC DIFFERENTIATION

Genetics ◽  
1974 ◽  
Vol 78 (3) ◽  
pp. 961-965
Author(s):  
P T Spieth
Keyword(s):  
Gene Flow ◽  
Genetic Differentiation ◽  
Population Size ◽  
Local Population ◽  
Biological Significance ◽  
Island Model ◽  
Genetic Identity ◽  
Biological Interpretation ◽  
Different Populations ◽  
Stepping Stone Model

ABSTRACT A brief analysis is presented for the effects of gene flow upon genetic differentiation within and between populations generated by mutation and drift. Previous results obtained with the "island" model are developed into a form that lends itself to biological interpretation. Attention is focused upon the effective local population size and the ratio of the genetic identity of two genes in different populations to that of two genes in the same population. The biological significance of this ratio, which is independent of population size, is discussed. Similarities between the results of this model and those of the "stepping-stone" model are noted.

scholarly journals Increased genetic diversity in Greek populations of the genus Ligidium (Crustacea: Isopoda: Oniscidea) revealed by RFLP analysis of mtDNA segments

2005 ◽  
Vol 74 (3-4) ◽  
pp. 255-264 ◽  
Author(s):  
Elena Klossa-Kilia ◽  
George Kilias ◽  
Spyros Sfenthourakis
Keyword(s):  
Genetic Diversity ◽  
Genetic Differentiation ◽  
16S Rdna ◽  
Central Europe ◽  
Phylogenetic Relationships ◽  
Rflp Analysis ◽  
Restriction Enzymes ◽  
Nominal Species ◽  
Nucleotide Divergence ◽  
Different Populations

We investigated mtDNA genetic differentiation and the phylogenetic relationships of 11 populations of the oniscidean genus Ligidium. We studied nine populations from Greece, assigned to three nominal species (L. euboicum, L. germanicum and L. beieri), and two from central Europe (L. germanicum and L. hypnorum), applying RFLP analysis of two mtDNA segments (12S rDNA and 16S rDNA) amplified by PCR. The analysis revealed seven monomorphic and four polymorphic populations, and 17 different haplotypes, each one present in one population only. Several restriction enzymes produced population specific patterns, enabling discrimination among the different populations. The estimated net nucleotide divergence between populations ranges from 1.06 to 16.52%, while the high NST value (0.96) indicates the existence of increased interpopulation genetic differentiation that can be attributed to the extreme isolation among Ligidium populations. The relationships between haplotypes and populations are not congruent with their geographical distribution and the established taxonomy within the genus.

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