Abstract

The hybrid origin of an organism’s genome has been regarded in recent years as the cause for a certain genetic instability inherent in such genomes. Using the model of amphidiploids and introgressive Aegilops wheat lines, evidence is given for confirming the facts of permanent alterations in their genomes, which were revealed at the phenotypic level in studies of morphological traits and biochemical character in successive generations of certain genotypes, as well as those of F1 and F2 hybrids. The actions of both transposons and intrachromosomal rearrangements caused by the 4Ssh gametocidal chromosome may be considered as the causes of such variability.

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