“…Recently, multiple simply inherited markers such as allozyme composition (Wolfe, 1976 ;Schwennesen et al ., 1982 ;Loukas et al, 1983 ;Goldy et al ., 1988 ;Weeden et al ., 1988 ;Chaparro et al, 1989 ;Durham et al, 1989; and DNA restriction sites (Yamamoto et al, 1991) have been developed in grape as well as in many other crops (Weeden, 1989) . In grape, isozyme techniques have been useful for cultivar identification (Wolfe, 1976 ;Schwennesen et al ., 1982 ;Parfitt, & Arulsekar, 1989) and hybridity confirmation (Goldy et al ., 1988 ;Chaparro et al ., 1989 ;Durham et al, 1989 ;Goldy et al, 1989), and 17 polymorphic loci including Gpi-2 and Pgm-2 have been defined Weeden et al, 1988) .…”