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High frequency of recombination strain

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A strain of bacteria that possesses the F factor integrated into the bacterial genome, which is transferred to other adjacent bacteria at a high rate or frequency.


During conjugation, the Hfr bacterium would likely transfer its entire DNA to the F-bacterium. However, since the mating bridge is structurally fragile the genetic transfer is usually incomplete. Hence, the recipient bacterium may only receive a portion of, and rarely the entire, bacterial genome of the donor Hfr bacterium.

Abbreviation: Hfr strain

Compare (with other groups of bacteria in terms of F factor):

See also: