A race of humans on a continent neighboring Euronda, who breed freely with various members of their population with no regard for "genetic purity." For this reason they posed a threat to the Eurondans, who possessed a Hitleresque ideology of a genetically pure race. Led by Alar's father, the Eurondans conceived of a plot to exterminate their enemy by filling the atmosphere with poison while they hid in an underground facility. But the Breeders survived, and a war between the two peoples began.
When they learned of the Eurondan's ideology and attempted genocide, SG-1 aided the Breeders in assaulting the Eurondan bunker. With the Eurondan hideout fatally damaged, it is likely that the Breeders had no problem winning the decades-long war following SG-1's departure and Alar's apparent death.
The Other Side - SG-1 discovers that the Eurondan enemy, who they call "Breeders," are the victims of attempted genocide by the Eurondans, who seek genetic purity.