Waihangahia tētahi putanga matatini ake o tēnei rerenga Ko te wāhi āhuatanga ā-tau (QTL) he rohe o te DNA e pā ana ki tētahi āhuatanga ā-ira motuhake.
Ko te tikanga, ko te putanga matatini ake o te rerenga korero ko "Ko te waahi tohu nui (QTL) he rohe o te DNA e pa ana ki tetahi ahuatanga phenotypic motuhake - ko enei QTL e kitea ana i runga i nga chromosomes rereke. "