Russian Journal of Genetics

, 45:1368 | Cite as

Chromosome synteny of the a genome of two evolutionary wheat lines

  • O. B. Dobrovolskaya
  • P. Sourdille
  • M. Bernard
  • E. A. Salina
Experimental Articles


In order to estimate synteny between At and A polyploid wheat genomes belonging to different evolutionary lines (Timopheevi and Emmer), saturation of chromosome maps of Triticum timopheevii At genome by molecular markers has been conducted. Totally, 179 EST-SSR and 48 genomic SSR-markers have been used with the following integration of 13 and 7 markers correspondingly into chromosome maps of At genome. ESTSSR showed higher transferability and lower polymorphism than genomic SSR markers. The chromosome maps designed were compared to maps of homoeologous chromosome group of the T. aestivum A genome. No disturbances of colinearity, i.e., of the order of markers within the chromosome segments on which they had been previously mapped, were observed. According to the quantity assessment of markers amplifying in homoeologous chromosomes, the maximum divergence was detected in two groups (4At/4A and 3At/3A) among the seven chromosomes examined in the A t and A genomes. Comparison of molecular genetic mapping results with the published results of studying meiosis of F1 hybrids and the frequency of chromosomes substitution in introgressive T. aestivum × T. timopheevii lines suggest that individual chromosomes of the At and A genomes evolve differently. Translocations were shown to introduce the major impact on the divergence of 4At/4A and 6At/6A chromosomes, while mutations of the primary DNA structure, on the divergence of homoeologous group 3 chromosomes. The level of reorganization of other chromosomes during the evolution in the At and A genomes was significantly lower.


Common Wheat Wheat Genome Homoeologous Chromosome Polyploid Wheat Emmer Group 
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Copyright information

© Pleiades Publishing, Ltd. 2009

Authors and Affiliations

  • O. B. Dobrovolskaya
    • 1
  • P. Sourdille
    • 2
  • M. Bernard
    • 2
  • E. A. Salina
    • 1
  1. 1.Institute of Cytology and Genetics Siberian BranchRussian Academy of SciencesNovosibirskRussia
  2. 2.UMR INRA-UBP Genetics, Diversity and Ecophysiology of CerealsClermont-FerrandFrance

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