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DcSto – carrot Stowaway-like elements are abundant, diverse, and polymorphic

Permanent URL:
http://handle.nal.usda.gov/10113/58530
File:
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Abstract:
We investigated nine families of Stowaway-like MITEs in the carrot genome, named DcSto1 to DcSto9. All of them were AT-rich and shared a highly conserved 6 bp-long TIR typical for Stowaways. The copy number of DcSto1 elements was estimated as ca. 5,000 per diploid genome. We observed preference for clustered insertions of DcSto and other MITEs. Distribution of DcSto1 hybridization signals revealed presence of DcSto1 clusters within euchromatic regions along all chromosomes. An arrangement of eight regions encompassing DcSto insertion sites, studied in detail, was highly variable among plants representing different populations of Daucus carota. All of these insertions were polymorphic which most likely suggests a very recent mobilization of those elements. Insertions of DcSto near carrot genes and presence of putative promoters, regulatory motifs, and polyA signals within their sequences might suggest a possible involvement of DcSto in the regulation of gene expression.
Author(s):
Alicja Macko-Podgorni , Anna Nowicka , Ewa Grzebelus , Philipp W. Simon , Dariusz Grzebelus
Subject(s):
Daucus carota , carrots , chromosomes , gene expression regulation , genes , genetic polymorphism , insertional mutagenesis , promoter regions , terminal repeat sequences , transposons
Source:
Genetica 2013 6 18 v.141 no.4-6
Language:
English
Year:
2013
Collection:
Journal Articles, USDA Authors, Peer-Reviewed
Rights:
Works produced by employees of the U.S. Government as part of their official duties are not copyrighted within the U.S. The content of this document is not copyrighted.