Somatic activity of the mariner transposable element in natural populations of Drosophila simulans

1996 ◽  
Vol 263 (1376) ◽  
pp. 1481-1486 ◽  
Keyword(s):  
Transposable Element ◽  
Natural Populations ◽  
Drosophila Simulans

Ongoing loss of the tirant transposable element in natural populations of Drosophila simulans

Gene ◽  
2006 ◽  
Vol 375 ◽  
pp. 54-62 ◽  
Author(s):  
Marie Fablet ◽  
John F. McDonald ◽  
Christian Biémont ◽  
Cristina Vieira
Keyword(s):  
Transposable Element ◽  
Natural Populations ◽  
Drosophila Simulans

WORLDWIDE DISTRIBUTION OF TRANSPOSABLE ELEMENT COPY NUMBER IN NATURAL POPULATIONS OF DROSOPHILA SIMULANS

Evolution ◽  
2003 ◽  
Vol 57 (1) ◽  
pp. 159-167 ◽  
Author(s):  
Christian Biémont ◽  
Christiane Nardon ◽  
Grégory Deceliere ◽  
David Lepetit ◽  
Catherine Lœvenbruck ◽  
...  
Keyword(s):  
Transposable Element ◽  
Copy Number ◽  
Natural Populations ◽  
Drosophila Simulans ◽  
Worldwide Distribution ◽  
Transposable Element Copy

WORLDWIDE DISTRIBUTION OF TRANSPOSABLE ELEMENT COPY NUMBER IN NATURAL POPULATIONS OF DROSOPHILA SIMULANS

Evolution ◽  
2003 ◽  
Vol 57 (1) ◽  
pp. 159 ◽  
Author(s):  
Christian Biémont ◽  
Christiane Nardon ◽  
Grégory Deceliere ◽  
David Lepetit ◽  
Catherine Lœvenbruck ◽  
...  
Keyword(s):  
Transposable Element ◽  
Copy Number ◽  
Natural Populations ◽  
Drosophila Simulans ◽  
Worldwide Distribution ◽  
Transposable Element Copy

scholarly journals Transposable elements in individual genotypes of Drosophila simulans

2019 ◽  
Author(s):  
Sarah Signor
Keyword(s):  
Transposable Elements ◽  
Transposable Element ◽  
Dna Sequences ◽  
Copy Number ◽  
Natural Populations ◽  
Population Level ◽  
Drosophila Simulans ◽  
Mobile Dna ◽  
Open Question ◽  
Number Of Individuals

AbstractTransposable elements are mobile DNA sequences that are able to copy themselves within a host’s genome. Within insects they often make up a substantial proportion of the genome. While they are the subject of intense research, often times when copy number is estimated it is estimated only at the population level, or in a limited number of individuals within a population. However, an important aspect of transposable element spread is the variance between individuals in activity. Do transposable elements accumulate at different rates in different genetic backgrounds? Using two populations of Drosophila simulans from California and Africa I estimated transposable element copy number in individual genotypes. Some active transposable elements seem to be a property of the species, while others of the populations. I find that in addition to population level differences in transposable element load certain genotypes accumulate transposable elements at a much higher rate than others. Most likely active transposable elements are fairly rare, and were inherited only by specific genotypes that were used to create the inbred lines. Whether or not this reflects dynamics in natural populations, where transposable elements may accumulate in specific genotypes and maintain themselves in the population rather than being active at low levels population wide, is an open question.

scholarly journals The mariner transposable element in natural populations of Drosophila simulans

Heredity ◽  
2008 ◽  
Vol 101 (1) ◽  
pp. 53-59 ◽  
Author(s):  
S Picot ◽  
G L Wallau ◽  
E L S Loreto ◽  
F O Heredia ◽  
A Hua-Van ◽  
...  
Keyword(s):  
Transposable Element ◽  
Natural Populations ◽  
Drosophila Simulans

scholarly journals Linkage disequilibrium in experimental populations of Drosophila simulans: a test of the random drift hypothesis

1987 ◽  
Vol 50 (3) ◽  
pp. 187-193
Author(s):  
Catherine Montchamp-Moreau ◽  
Mariano Katz
Keyword(s):  
Linkage Disequilibrium ◽  
Genetic Drift ◽  
Natural Populations ◽  
Aldehyde Oxidase ◽  
Drosophila Simulans ◽  
Random Drift ◽  
Esterase 6 ◽  
Experimental Populations ◽  
Experimental Values ◽  
Neutralist Hypothesis

SummaryLinkage disequilibrium between five polymorphic enzymic loci of the third chromosome (Esterase-6, Phosphoglucomutase, Esterase-C, Aldehyde Oxidase and Acid Phosphatase) was studied in experimental populations of Drosophila simulans. Gametic data were obtained by mating sampled males with homozygous females at the five loci. Four cage populations were initiated with flies caught from natural populations. Extensive linkage disequilibrium was detected after 25 or 34 generations. The effective size of these populations was estimated about 400. Monte-Carlo simulations were performed in order to determine whether the observed disequilibria could be due to genetic drift. The observed probability distribution of the experimental values of r (the gametic correlation coefficient) was consistent with the distribution expected under random genetic drift. Our results are thus in accordance with the neutralist hypothesis.

On the evolution and population genetics of hybrid-dysgenesis-causing transposable elements in Drosophila

1986 ◽  
Vol 312 (1154) ◽  
pp. 205-215 ◽  
Keyword(s):  
Population Genetics ◽  
Natural Selection ◽  
Transposable Elements ◽  
Transposable Element ◽  
Natural Populations ◽  
Element Composition ◽  
Hybrid Dysgenesis ◽  
Evolutionary Significance ◽  
Genetic Elements ◽  
Transposable Genetic Elements

Much has been learned about transposable genetic elements in Drosophila , but questions still remain, especially concerning their evolutionary significance. Three such questions are considered here, (i) Has the behaviour of transposable elements been most influenced by natural selection at the level of the organism, the population, or the elements themselves? (ii) How did the elements originate in the genome of the species? (iii) Why are laboratory stocks different from natural populations with respect to their transposable element composition? No final answers to these questions are yet available, but by focusing on the two families of hybrid dysgenesis-causing elements, the P and I factors, we can draw some tentative conclusions.

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