User blog comment:Supahbadmarine/Too Many Loyalists!/@comment-1257337-20110604111635/@comment-1932673-20110605195427

Right thats it. It is without doubt that mixing loyalist geneseed with Traitor geneseed is NCF as all traitor gene seed stocks were destroyed by the Imperium or secured in a statis-sealed chamber under the Imperial Palace, which only a chosen few know about and therefore the Imperium would never use traitor geneseed as it is inheritably flawed (which contribuated to the Horus Heresy).