- The grapes clone A – 18/3 was found to be superior in terms of the highest yield per vine followed by Red Globe and Manjari Medika respectively.
- In respect of the quality traits, the variety Fantasy Seedless recorded the highest TSS (22.67oBrix) with the lowest acidity (0.502 %).
- Five elite types of grapes var. Muscat Hamburg (Panneer) clones were identified (three from Theni and two from Dindigul districts).
- Among the 121 grape accessions evaluated, early bud burst (14 days after pruning) was noticed in grape accession TGC-44 (Sauvignon Blanc). Highest leaf length (12.97 cm) and leaf area (204.78 cm2) were recorded in TGC-11 (Crimson Seedless). Whereas the maximum leaf breadth (16.97 cm) was observed in TGC-22 (Flame Seedless). Maximum cane thickness (2.58 cm) registered in TGC-53 (E-12/2). In grape accession TGC-2 (Medika), the petiole length was recorded to be the highest (8.37 cm).
- Both the highest number of bunches per vine (67.33) and yield (10.77 kg vine-1) were recorded in grape accession TGC-56 (Sonaikodi Panneer) during the first pruning season, while the individual bunch weight (544.50 g) was the highest in TGC-23 (Madhu Angoor). The highest TSS (24.780Brix) was registered in the grape accession no. TGC-35 (Kishmish Bailey) whereas the lowest acidity value (0.64%) was recorded in the grape accession TGC-22 (Flame Seedless).
- The accession viz., TGC – 1 (Clone A-18/3), Concord, Isabella, Covent Large Black, Bangalore Blue, Manjari Medika and Pusa Navrang were found to be field tolerant against downy mildew disease incidence.
Improved varieties identified for commercial cultivation in Tamil Nadu
| Clone A – 18/3 |
Salient features |
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- This clone is suitable for table purpose.
- Amenable for double pruning and double cropping.
- Medium sized bunches weighing 250 – 300 g.
- Dark blue coloured oblong berries with rudimentary seeds or seedless.
- Total Soluble Solids content: 18- 19o Brix.
- Yield: 18 – 20 tonnes ha-1.
- Moderately field tolerant to downy mildew and berry shattering.
|
 Red Globe |
- Characterized with prolonged juvenility.
- Amenable for double pruning and single cropping.
- Bunch weight: 600 g to 750 g.
- Attractive pinkish red coloured berries.
- Bold sized berries (>20 mm) with crisp pulp.
- Fetches premium price in the domestic and export market.
- Enhanced shelf life 20-25 days in ambient conditions.
- Yield: 25 to 30 tonnes ha-1.
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 Manjari Medika
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- Suitable for juice making and table purpose.
- Amenable for double pruning and double cropping.
- Berries are attractive dark blue in colour with ashy coating.
- Bunches are medium sized (250 g to 350 g).
- Juice is teinturier with dark red colour.
- TSS: 18-20oBrix.
- Rich in anti-oxidants, phenols and flavonoids, pigments suitable for traditional medicines preparation.
- Yield: 20 – 25 tonnes ha-1.
|
 2 A Clone |
- This is a clonal selection from Thompson Seedless variety suitable for table and raisin making.
- Berries take 130 days for maturity.
- Berries are round and pale yellow in colour with crisp pulp, low water content and high TSS (20oBrix).
- The special characteristic feature of this clone is self thinning and does not require GA3 treatment.
- Yield : 25-30 tonnes per hectare.
|
 Sharad Seedless |
- This variety is a selection from Russian selection from Kishmish Chernyi suitable for table purpose.
- Berries take 125 days for ripening.
- Berries are attractive dark blue in colour ellipsoid berries with high crisp pulp, low water content and high TSS (18-20oBrix)
- Yield : 20-25 tonnes per hectare
|
 Fantasy Seedless |
- This grape is a complex hybrid derived from a cross between B36-27 x P 64-18 at USDA Fresno, California.
- Vines are vigorous require high sunlight exposure for adequate fruitfulness.
- This variety does not require GA3 for thinning / sizing.
- Berries are medium bold, deep purple to black, seedless, thin skin and firm and obovate in shape.
- Clusters are medium in size, conical shape, and medium to loose in compactness with excellent flavour.
- It is mid late ripening variety and takes not less than 130 days from pruning.
- Late harvesting and excess soil moisture / humid conditions sometimes lead to berry
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