1887

Abstract

SUMMARY

Fowl plague virus (FPV) mutants belonging to six recombination groups and obtained from the Weybridge strain (in the U.S.S.R.) or the Rostock strain (in the U.K.) have been studied in a recombination test. Temperature-sensitive mutants obtained from different FPV strains were revealed which had a mutation in gene 1; however, their crossing resulted in recombinants which appeared with a high frequency. This phenomenon was due not to intragenic complementation but to extragenic suppression, when the expression of a phenotype of the Rostock strain mutant gene 1 is suppressed by gene 2 products of the Weybridge strain.

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1982-10-01
2022-01-25
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