Brigham Young affirms Adam and Eve are our parents in the flesh and also our Spirits.
Brigham Young, "Intelligence, Etc.," Journal of Discourses, 26 vols. (Liverpool: Amasa Lyman, 1860), 7:290
God has created of one blood all the nations and kingdoms of men that dwell upon all the face of the earth: black, white, copper-coloured, or whatever their colour, customs, or religion they have all sprung from the same origin; the blood of all is from the same element. Adam and Eve are the parents of all pertaining to the flesh, and I would not say that they are not also the parents of our Spirits.