1887

Abstract

Summary: Crosses between P strains of (biotype ‘eltor’) and P strains of (‘classical’) were infertile under conditions in which P × P crosses of (‘classical’) strains were fertile. The efficiency of conjugation, as determined by the frequency of P transfer, was lower with P strains of the ‘eltor’ biotype compared with P strains of (‘classical’). However, incubation of P strains at 44·5°C, prior to mating, induced fertility in bacteria of the ‘eltor’ biotype and enhanced it in (‘classical’) crosses. It is suggested that new donors associated with a greater efficiency of conjugation are formed at 44·5°C in P strains of both biotypes.

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/content/journal/micro/10.1099/00221287-78-1-119
1973-09-01
2021-10-19
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