Eco-physiological traits of a new wine grape cultivar (Vitis ficifolia var. ganebu x Vitis vinifera 'Muscat of alexandria')

The level of moisture and chilling largely affect grape yield and quality. In the present study, the growth dynamics of 'Kadainou R-1', a new wine grape cultivar derived from two Vitis genotypes i.e. V.ficifolia var. ganebu and V vinifera 'Muscat of Alexandria', was determined under three moisture regimes i.e. wet (0-3.1kPa), medium (3.1-15.54kPa) and dry (>15.54kPa). In addition, the chilling requirements of the same cultivar were investigated. The level of irrigation had dramatic effects on both shoot and root growth of 'Kadainou R-1' during the course of the experiment. Shoots on vines maintained under wet condition were 128% and 331% longer than those on vines maintained under medium and dry conditions, respectively. Fresh and dry weight of both root and shoots were found highest in wet conditions followed by medium and dry conditions respectively. Period of endo-dormancy was determined forcing single node cuttings in a growth chamber with the temperature kept at 25 +/- 1 degrees C and with a photoperiod of 16 hours. Unlike its parents, 'Kadainou R-1' showed shallow dormancy regardless of the chilling time accumulation.