Productivity of very early newly created Yugoslav grape vine varieties Biserka Rana, Beogradska Rana and Grocanka
1997
Pavlovic, K. (Jugoslovenski poljoprivredno-sumarski centar, Beograd (Yugoslavia))
Biserka Rana, Beogradska Rana and Grocanka rank in the group of very early grape vine varieties, as well as the control variety Cabski Biser, which is also one of the parent pairs in the Grocanka and Biserka Rana varieties. Regarding grape yields, grape cluster weight and 100 berries weight the lowest values, in some cases equaling those obtained with the Cabski Biser control variety, were registered for the Biserka Rana variety, whereas Beogradska Rana and Grocanka ensured significantly or highly significantly higher values as compared with the same standard. The highest grape yield and grape cluster weight were obtained with Beogradska Rana, and the largest berries were found in the Grocanka variety. Sugar and total acids content analysis showed the variations to be somewhat less pronounced. The highest sugar contents were recorded for Beogradska Rana and Grocanka, and the highest total acids content for Biserka Rana. It may be concluded that varieties of the investigated productivity characteristics among individual varieties and trial localities are more pronounced in case of grape yield, grape cluster weight and 100 berries weight.
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