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[Expression of genes controlling modification of amylase in hybrids and original representatives of a cattle subfamily (Bovinae)].

Modifications of similar type were noted in the number of multiple AMY-1 forms of amylase isozyme for various species of Artiodactyla. It is supposed that these modifications are linked to periodical activation during evolution of genes responsible for modification of the molecules. Data obtained on Bovinae hybrids testify to this point of view. Inactivation of active and reinactivation of "silent" genes responsible for modification of AMY-1 molecules are observed in hybrids of bison x cow and bison x aurochs combinations.