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

Ahu Altinkut, Violetta Kotseruba, Valery M. Kirzhner, Eviatar Nevo, Olga Raskina, Alexander Belyayev

Research output: Contribution to journalArticlepeer-review


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 two species with different mating systems with the same but randomly simulated parameters, revealed that non-random population structure in the Mediterranean floral zone suffers and becomes chaotic in the Irano-Turanian zone.

Original languageEnglish
Pages (from-to)307-317
Number of pages11
JournalChromosome Research
Issue number3
StatePublished - Apr 2006

Bibliographical note

Funding Information:
The authors are grateful to anonymous reviewers for their helpful comments. Part of this work was conducted on the basis of the center Chromas (Biological Institute of Saint-Petersburg State University) and the authors are most grateful to Elena R. Gaginskaya and Svetlana E. Derjusheva for this opportunity. We thank Thomas Koprek (Max Planck Institute for Plant Breeding Research) for providing AcTPase fragments for experiments. The work was partly supported by research fellowships to Dr Ahu Altinkut from the Unesco Loreal Young Women Scientist Fellowship and the IPGRI-Vavilov Frankel Fellowship.


  • 45S rDNA
  • 5S rDNA
  • Chromosomes
  • In-situ hybridization
  • Transposons
  • Triticeae

ASJC Scopus subject areas

  • Genetics


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