“…As shown in Table 3, the mean ° Brix of cultivated species (V vinifera : Lott & Barrett, 1967 ;Kliewer, 1970;V labrusca : Caldwell,1925 ; hybrids between V labrusca and V vinifera : Caldwell, 1925 ;Lott & Barrett, 1967) were generally high (17 to 20%), while that of V rotundifolia (Carroll et al ., 1971) and wild species (Nakagawa et al ., 1980) were low (13% and 12%, respectively) except V coignetiae (16%) . In this study, the mean ° Brix of cultivated species were higher (varieties : 17% ; bred lines : 18%) than that of rootstocks (11%) and wild species (13%), which is in agreement with previous reports, but it needs further research on wild species and rootstocks because of the lack of information .…”