, ▁in ▁the ▁late ▁ 2 0 th ▁century ▁ ▁it ▁was ▁the ▁third ▁most ▁widely ▁plant ed ▁gra pe ▁variety ▁in ▁the ▁Lo ir - et - Ch er ▁département ▁which ▁includes ▁the ▁win em aking ▁areas ▁of ▁Che ver ny , ▁Cour - Che ver ny , ▁Montr ich ard , ▁O is ly , ▁Saint - R om ain - sur - Ch er , ▁Val enç ay ▁as ▁well ▁as ▁v ine y ards ▁that ▁make ▁w ines ▁under ▁the ▁T ou raine ▁A OC , ▁C rem ant ▁de ▁Lo ire ▁A OC ▁and ▁Vin ▁de ▁Pays ▁du ▁Lo ir ▁et ▁Cher . ▁By ▁ 2 0 0 4 ▁a cre age ▁had ▁stead ily ▁decl ined ▁to ▁around ▁ 7 5 0 ▁acres ▁( 3 0 0 ▁hect ares ). ▁It ▁is ▁still ▁a ▁permitted ▁gra pe ▁variety ▁in ▁the ▁App ell ation ▁d ' origine ▁contr ô l ée ▁( A OC ) ▁regions ▁of ▁Che ver ny ▁A OC , ▁Val enç ay ▁A OC ▁and ▁V ouv ray ▁A OC . ▁ ▁History ▁▁ ▁A mp el ograph ers ▁are ▁not ▁completely ▁sure ▁about ▁Ar bo is ' ▁orig ins ▁though ▁some ▁of ▁the ▁gra pe ' s ▁syn onym s ▁seem ▁to ▁suggest ▁a ▁relationship ▁with ▁the ▁Pin ot ▁family , ▁as ▁does ▁its ▁weak ▁association ▁with ▁the ▁J ura ▁wine ▁region ▁of ▁Ar bo is ▁A OC ▁( most ly ▁through ▁its ▁similar ities ▁in ▁leaf ▁structure ▁with ▁Sav agn in ).