Ac-like transposons in populations of wild diploid Triticeae species: comparative analysis of chromosomal distribution.

Chromosome Research : an International Journal on the Molecular, Supramolecular and Evolutionary Aspects of Chromosome Biology
Ahu AltinkutAlexander Belyayev

Abstract

Data are presented on the intra- and interspecific differences/similarities in chromosomal patterns of Ac-like elements (hAT family) in ecologically contrasted populations of three Triticeae species - Aegilops speltoides, Triticum urartu, and Hordeum spontaneum. Application of original computer software made it possible to precisely map transposon clusters and to link them to known chromosomal markers (rDNA sites, centromeres, and heterochromatin regions). From our data we can specify the most visible features of Ac-like elements chromosomal distribution: preferential concentration in chromosomal proximal regions; high percentage of clusters on the border between euchromatin and heterochromatin; complementary chromosomal arrangement towards En/Spm transposons (CACTA); population-specific insertions into centromeres; more differences in total cluster numbers between populations of self-pollinated species than between populations of cross-pollinated species. The application of statistical simulation (Resampling) method to analysis of data indicates that ecology may play a certain role in dynamics of Ac-like elements. Comparison of real Ayala distances, as well as real chromosomal distribution of Ac-like elements in populations of...Continue Reading

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Citations

Sep 26, 2012·Chromosome Research : an International Journal on the Molecular, Supramolecular and Evolutionary Aspects of Chromosome Biology·Ching Man WaiQingyi Yu
Jan 17, 2012·Plant Molecular Biology·Gerhard MenzelThomas Schmidt

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