%0 Journal Article %A Friend, E. J. %A Warren, M. %A Hopwood, D. A. %T Genetic Evidence for a Plasmid Controlling Fertility in an Industrial Strain of Streptomyces rimosus %D 1978 %J Microbiology, %V 106 %N 2 %P 201-206 %@ 1465-2080 %R https://doi.org/10.1099/00221287-106-2-201 %I Microbiology Society, %X A plasmid (SRP1) determines most of the genetic recombination which occurs between marked derivatives of our strain of Streptomyces rimosus. SRP1? strains occur with a frequency of about 0.3% amongst spores of SRP1 + strains. In SRP1 +xSRP1 ? crosses, SRP1 is transferred to more than 50% of the SRP1 ? parent. SRP1 +xSRP1 ? crosses are about 100 times more fertile than SRP1+xSRP1+ crosses (10?3 to 10?4 compared with 10?5 to 10?7). A very low frequency (about 10?8) of true recombinants occurs in the absence of SRP1. %U https://www.microbiologyresearch.org/content/journal/micro/10.1099/00221287-106-2-201