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Transposable elements and the evolution of genome size in eukaryotes
- M. G. Kidwell
- 1 May 2002
Limited evidence is provided to support the existence of an approximately linear relationship between total transposable element DNA and genome size.
PERSPECTIVE: TRANSPOSABLE ELEMENTS, PARASITIC DNA, AND GENOME EVOLUTION
It is argued that easy popular appellations such as “selfish DNA’ and “junk DNA” may be either inaccurate or misleading and that a more enlightened view of the transposable element-host relationship encompasses a continuum from extreme parasitism to mutualism.
Hybrid Dysgenesis in DROSOPHILA MELANOGASTER: A Syndrome of Aberrant Traits Including Mutation, Sterility and Male Recombination.
There are potentially important practical implications of hybrid dysgenesis for laboratory experimentation and care should be exercised in planning experiments involving strain crosses, and evidence that at least four of the traits are not found in nonhybrids is presented.
Transposable elements as sources of variation in animals and plants.
Here, TE-induced variation is viewed from three evolutionary perspectives that are not mutually exclusive and possible coadaptations between elements and their hosts that appear to have evolved to reduce the deleterious effects of new insertions on host fitness are described.
The molecular basis of P-M hybrid dysgenesis: The role of the P element, a P-strain-specific transposon family
Evidence for horizontal transmission of the P transposable element between Drosophila species.
An extensive survey of the genus Drosophila using Southern blot analysis showed that P-homologous sequences are essentially confined to the subgenus Sophophora, and suggested that D. willistoni may have served as the donor species in the horizontal transfer of P elements to D. melanogaster.
Evolution of hybrid dysgenesis determinants in Drosophila melanogaster.
- M. G. Kidwell
- BiologyProceedings of the National Academy of Sciences…
- 1 March 1983
An extensive survey for dysgenic potential in Drosophila melanogaster strains reported, finding striking temporal trends in the distribution of strains were observed with respect to the two transposable element systems; in particular, the frequency of R and M strains is positively correlated with laboratory age.
KP elements repress P‐induced hybrid dysgenesis in Drosophila melanogaster.
Molecular and genetic analysis has revealed a specific P factor deletion derivative (the KP element) which is able to repress P‐induced hybrid dysgenesis and is thus distinct from the maternally transmitted P cytotype mode of suppression.
Molecular characteristics of diverse populations are consistent with the hypothesis of a recent invasion of Drosophila melanogaster by mobile P elements.
The available evidence is consistent with the hypothesis of a worldwide P-element invasion of D. melanogaster during the past 30 years and suggests that the putative invasion of the Americas possibly preceded by approximately a decade that in Europe, Africa, and the rest of the world.
Horizontal transfer and selection in the evolution of P elements.
The roles of selection and horizontal transfer in the evolution of the canonical subfamily of P: elements were studied in the saltans and willistoni species groups of the genus Drosophila, suggesting that horizontal transfer among eukaryotes might be more common than anticipated.