User blog comment:Supahbadmarine/Too Many Loyalists!/@comment-1257337-20110604111635/@comment-2253300-20110604155948

Precisely what about mixing Gene-seed is not canon? It has been expressly stated that the Adeptus Mechanicus often mix the Bloodlines in creating new Chapters. It is one of the reasons why there are many Chapters that do not know their origins.