Quantitative variation of species-specific subtelomeric repeat Spelt1 was studied in the progeny of an individual plant from the introgressive line Triticum aestivum × Aegilops speltoides. In the progeny, no cases of the Spelt1 increased content were observed. On the contrary, in some cases statistically significant decrease of the repeat copy number was detected. It seems likely that the mechanisms of the Spelt1 elimination involve either the selection at the gamete level versus the increase of the satellite DNA content in the telomeres, or intramolecular (within one chromatid) homologous recombination.
Russian Journal of Genetics – Springer Journals
Published: Apr 20, 2007
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