Maize Transposable Elements in Development and Evolution
نویسندگان
چکیده
منابع مشابه
Evolution and consequences of transposable elements.
Recent studies on transposable elements (TEs) have shed light on the mechanisms that have shaped their evolution. In addition to accumulating nucleotide substitutions over evolutionary time, TEs appear to be especially prone to genetic rearrangements and vertical transmissions across even distantly related species. As a consequence of replicating in host genomes, TEs have a significant mutation...
متن کاملTransposable elements and host genome evolution.
Several recent reports have challenged the idea that transposable elements (TEs) are mainly 'selfish' or 'junk' DNA with little importance for host evolution. It has been proposed that TEs have the potential to provide host genomes with the ability to enhance their own evolution. They might also be a major source of genetic diversity, allowing response to environmental changes. Because the rela...
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Transposable elements (TE) are natural constituents of plant genomes. However, their presence only becomes apparent if they become dislodged from their resident positions in the genome and transpose into another gene, thereby inducing a mutation. Such TE-induced mutations are somatically unstable because they revert to wild type and hence reconstitute the expression of the mutated gene. The fre...
متن کاملIsolation of the transposable maize controlling elements Ac and Ds.
Restriction endonuclease fragments containing part of the Waxy (Wx) locus have been cloned from strains with insertion mutations at the locus caused by the controlling elements Activator (Ac) and Dissociation (Ds). Evidence is presented that the genetically defined Ac element corresponds to a 4.3 kb insertion, while the two Ds elements correspond to 4.1 kb and 2.0 kb insertions, all near the 3'...
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Transposable elements (TEs) are powerful facilitators of genome evolution, and hence of phenotypic diversity as they can cause genetic changes of great magnitude and variety. TEs are ubiquitous and extremely ancient, and although harmful to some individuals, they can be very beneficial to lineages. TEs can build, sculpt, and reformat genomes by both active and passive means. Lineages with activ...
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ژورنال
عنوان ژورنال: American Zoologist
سال: 1989
ISSN: 0003-1569
DOI: 10.1093/icb/29.2.549