congenic

con·gen·ic

(kon-jen'ik),

Relating to an inbred strain of animals produced by repeated crossing of one gene line onto another inbred (isogenic) line.

[con- + G. genos, birth, + -ic]

Referring to organisms which differ in only one gene locus, the result of specific inbreeding of animals in experimental settings

congenic

Of organisms that differ only at a single genetic locus.