Vision 2025 - National Research Centre for Grapes

• Genetic variability among the accessions and heritability of several quantitative traits were
analysed. Positive correlation was observed between yield per
vine and bunch number, yield and mean bunch weight, juice
percentage and berry diameter.
• Evaluation of germplasm has resulted in the identification of
several useful accessions. A17-3, a clonal selection from
Centennial Seedless has been identified for table purpose.
Kishmish Rozavis White, a mutant of Kishmish Rozavis is
selected for white raisin and high yielding A18-3, a black
seedless selection from an open pollinated seedling progeny of
a black seeded variety for black raisin productions.
Fig. 3. A-17-3
Fig. 4. Kishmish Rozavis
White
• Clone 2A of Thompson Seedless, Red Globe, Crimson
Seedless, Flame Seedless and Italia was introduced and are
under field testing at various locations in the country including
AICRP. Preliminary studies indicate that 2A clone of
Thompson seedless and Red Globe are promising in
Maharashtra and Flame Seedless in Punjab and Uttar Pradesh
• Several hybrids of indigenous species and varieties with
introduced cultivars were found promising for traits like early
ripening and quality traits. These hybrids are under evaluation.
• A computer database was developed for germplasm based on
UPOV descriptors. It allows storage and retrieval of characterization data of germplasm.
• 24 rootstocks and 44 other accessions were
characterized with micro satellite markers. The
work on molecular database is initiated for storage
and retrieval of molecular data.
• The confusion between two morphologically
different Dogridge rootstock plants, available with
Fig. 5. Micro satellite analysis of grape
grape growers as Dogridge-A (America) and accessions
Dogridge-B (Bangalore) was resolved based on
micro satellite marker analysis and ampelometric studies.
Rootstocks Dogridge-A resembled 110 Richter (110 R),
which is a hybrid of V. berlandieri × V. rupestris, whereas
Dogridge-B belongs to the species V. champini.
• All the germplasm available in the field gene bank of the
Centre was screened for resistance to downy mildew in vivo
under conditions highly favourable for disease development,
for two consecutive seasons. Accessions rating as resistant in
vivo were further screened under controlled conditions in
vitro to confirm the field ratings. Similarly other accessions
of interest were also screened in vitro to determine their
disease resistant status.
Fig. 6. In vitro screening for
downy mildew resistance
- note sporulation of
Plasmopara viticola on
leaf disc
• Accessions with varying level of resistance and susceptibility selected in the above studies
are being used for identification of molecular markers associated with downy mildew
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