User blog comment:Supahbadmarine/Too Many Loyalists!/@comment-1257337-20110604111635/@comment-2253300-20110606013547

While I can't find the article, I remeber one that stated that the Adeptus Mechanicus isolates and/or mixes the Gene-seeds of many Chapters in order to experiment for new Chapters. Furthermore I most definitely remember a statistic stating that 80% of all current Chapters have Ultramarines Gene-seed. Yet not all of them are labeled as Ultramarines successors. Guys there are no Canon examples because A mixed Chapter is not likely to identify with the Chapters that make up it's origin. Also It is implied that those Chapters that do not name a Specific ancestor are most likely mixed. Mixed Gene-seed is canon. Also the Brotherhood of the Faithful do not identify themselves as having Traitor implants, that is there little secret from all but the most powerful Imperial authorities.