Among four lines of tepary bean (NE#5, NE#7, NE#8A and NE#19), comparatively, two produced high seed yield under drought conditions in the field.The high yielding lines (NE#8A and NE#19) exhibited potential dehydration-avoidance mechanisms based on physiological and morphophysiological alterations of the root and leaves.NE#19 developed deep penetrating root that had the greatest mass in the deepes...