“…Roose (1988), reported it was difficult to distinguish cultivars originated mutations using isozyme markers. Low level of polymorphism in orange also found with ISSR (Fang & Roose, 1997), SSR (Luro et al, 2000;Novelli et al, 2006), SRAP (Uzun et al, 2009a). On the other hand, no variation found in studied oranges in some researchs (Orford et al, 1995;Qing-Qin et al, 2007).…”