title: Mechanisms of variability of vertebrate virus populations.
abstract: A number of factors favouring the persistence and accumulation of mutant virus particles are active in virus populations with a complicated genetic structure. The latter circumstance permits to apply the concept of genetic load to these virus populations. Complication of the genetic structure permits a virus population to make a qualitative leap in the struggle for existence.
mesh_terms: D001103:Arboviruses / Q000378:metabolism; D005075:Biological Evolution; D002449:Cell Aggregation; D004267:DNA Viruses / Q000378:metabolism; D005787:Gene Frequency; D005796:Genes; D014644:Genetic Variation; D006564:Herpesviridae / Q000378:metabolism; D006579:Heterozygote; D009154:Mutation; D009975:Orthomyxoviridae / Q000378:metabolism; D011212:Poxviridae / Q000378:metabolism; D012328:RNA Viruses / Q000378:metabolism; D011995:Recombination, Genetic; D012641:Selection, Genetic; D014779:Virus Replication; D014780:Viruses / Q000378:metabolism