Abstract
This study evaluated the ampelographical and bunch characteristics of 19 white wine grape varieties (Vitis vinifera L.) grafted on Dogridge rootstock at the National Active Germplasm Site, National Research Centre for Grapes, Pune, during 2023-24. The experiment was conducted on completely randomized block design comprising five vines per replication and three replications per cultivar. The results of the study revealed significant variability in the morphological characteristics of white wine grape varieties. The young shoot tip's opening with a high CV of 37.86 %, indicating substantial variation. The highest variability was observed for berry shape (CV 58.66 %) and berry color (CV 62.09 %), highlighted the diverse phenotypic traits among cultivars. Parameters such as bunch compactness and formation of seed showed lower variability, suggesting more consistency in these traits. Most cultivars had fully open young shoot tips. Tendril distribution was predominantly found sub-continuous, with unified tendrils. Young leaves were found mainly green colored with bronze spots (7). All cultivars exhibited bark peeling. The shoot attitude was primarily erect. Most mature leaves had large blades and pentagonal shapes. Berry density in bunches was generally compact, with round berries being the most common shape. Berry skin color was often green-yellow and all berries lacked anthocyanin coloration in the mesocarp. Time to bud burst ranged from 8.7 to 12.7 days after fruit pruning. Full bloom stage occurred between 34 and 44 days after fruit pruning. Flowering lasted 3.3 to 6.7 days. Veraison occurred from 95 to 114.67 days after fruit pruning and physiological berry maturity ranged from 122 to 147 days after fruit pruning. The results showed a range of correlations among various traits. Pruning biomass had a moderate positive correlation with 50 berry weight and berry skin thickness. Bunch weight showed strong correlations with bunch length and bunch width. TSS was negatively correlated with bunch weight and berry skin thickness. Total acids had a high positive correlation with malic acid. Ethanol content was positively correlated with TSS.
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Claims 18
Claim · model-written summary
White wine grape varieties varied significantly in morphology.
Verbatim
e0“The results of the study revealed significant variability in the morphological characteristics of white wine grape varieties.”
Claim · model-written summary
Young shoot tip opening had a coefficient of variation of 37.86%.
Verbatim
e0“The young shoot tip's opening with a high CV of 37.86 %”
t0“white wine grape”
Claim · model-written summary
Berry shape variation was 58.66%.
Verbatim
e0“berry shape (CV 58.66 %)”
t0“white wine grape”
Claim · model-written summary
Berry color variation was 62.09%.
Verbatim
e0“berry color (CV 62.09 %)”
t0“white wine grape”
Claim · model-written summary
Bunch compactness and seed formation varied less among varieties.
Verbatim
e0“Parameters such as bunch compactness and formation of seed showed lower variability”
t0“white wine grape”
Claim · model-written summary
Most cultivars had fully open young shoot tips, predominantly sub-continuous tendrils and green young leaves with bronze spots.
Verbatim
e0“Most cultivars had fully open young shoot tips. Tendril distribution was predominantly found sub-continuous, with unified tendrils. Young leaves were found mainly green colored with bronze spots (7).”
t0“white wine grape”
Claim · model-written summary
All cultivars showed bark peeling; shoots were mainly erect and mature leaves mostly large and pentagonal.
Verbatim
e0“All cultivars exhibited bark peeling. The shoot attitude was primarily erect. Most mature leaves had large blades and pentagonal shapes.”
t0“white wine grape”
Claim · model-written summary
Bunches were usually compact with round berries, green-yellow skin and no mesocarp anthocyanin.
Verbatim
e0“Berry density in bunches was generally compact, with round berries being the most common shape. Berry skin color was often green-yellow and all berries lacked anthocyanin coloration in the mesocarp.”
t0“white wine grape”
Claim · model-written summary
Bud burst occurred 8.7 to 12.7 days after fruit pruning.
Verbatim
e0“Time to bud burst ranged from 8.7 to 12.7 days after fruit pruning.”
t0“white wine grape”
Claim · model-written summary
Full bloom occurred 34 to 44 days after fruit pruning.
Verbatim
e0“Full bloom stage occurred between 34 and 44 days after fruit pruning.”
t0“white wine grape”
Claim · model-written summary
Flowering lasted 3.3 to 6.7 days.
Verbatim
e0“Flowering lasted 3.3 to 6.7 days.”
t0“white wine grape”
Claim · model-written summary
Veraison occurred 95 to 114.67 days after fruit pruning.
Verbatim
e0“Veraison occurred from 95 to 114.67 days after fruit pruning”
t0“white wine grape”
Claim · model-written summary
Physiological berry maturity occurred 122 to 147 days after fruit pruning.
Verbatim
e0“physiological berry maturity ranged from 122 to 147 days after fruit pruning.”
t0“white wine grape”
Claim · model-written summary
Pruning biomass correlated moderately and positively with berry weight and skin thickness.
Verbatim
e0“Pruning biomass had a moderate positive correlation with 50 berry weight and berry skin thickness.”
t0“white wine grape”
Claim · model-written summary
Bunch weight correlated strongly with bunch length and width.
Not reportedDirection
Verbatim
e0“Bunch weight showed strong correlations with bunch length and bunch width.”
t0“white wine grape”
Claim · model-written summary
TSS correlated negatively with bunch weight and berry skin thickness.
Verbatim
e0“TSS was negatively correlated with bunch weight and berry skin thickness.”
t0“white wine grape”
Claim · model-written summary
Total acids correlated strongly and positively with malic acid.
Verbatim
e0“Total acids had a high positive correlation with malic acid.”
t0“white wine grape”
Claim · model-written summary
Ethanol content correlated positively with TSS.
Verbatim
e0“Ethanol content was positively correlated with TSS.”
t0“white wine grape”