Abstract
Adaptability, yield, quality attributes, and cumulative growing degree day (GDD) requirements of ‘Barbera 02’, ‘Cabernet Sauvignon 02’, ‘Cabernet Sauvignon 04’, ‘Chardonnay 29’, ‘Merlot 01’, and ‘Sangiovese 04’ wine grapes cultivar clones (Vitis spp.) under climatic conditions of southwest Idaho (Intermountain West region, USA) were evaluated during 2000 and 2001 seasons. ‘Sangiovese 04’ had significantly higher yield than ‘Cabernet Sauvignon 02’, ‘Cabernet Sauvignon 04’, ‘Chardonnay 29’, and ‘Merlot 01’ in both 2000 and 2001. ‘Barbera 02’ also had relatively higher yield than many other cultivar clones. ‘Cabernet Sauvignon 02’ had the lowest yield, although differences were not always significant. Other than cluster weight in 2000, no significant differences existed for yield, fruit quality attributes, or GDD requirements between the two ‘Cabernet Sauvignon’ clones (’Cabernet Sauvig non 02’ and ‘Cabernet Sauvignon 04). ‘Barbera 02’ and ‘Sangiovese 04’ had the largest, while ‘Cabernet Sauvignon 02’ had the smallest clusters and berries among all tested cultivar clones. ‘Cabernet Sauvignon 02’ and ‘Cabernet Sauvignon 04’ had significantly greater soluble solids concentrations than ‘Chardonnay 29’ in both 2000 and 2001. ‘Chardonnay 29’, with an average of 2799 GDD, matured earlier than other grapes. ‘Sangiovese 04’ with an average of 3381 GDD days was the last grape to mature and be harvested. All tested cultivar clones can successfully be grown under conditions of this experiment.
