Performance of Thompson Seedless Grape and ITS Clones on Dog RIDGE Rootstock
R&D Unit, Maharashtra State Grape Growers’ Association, Manjri Farm, Pune-412307, India
International Journal of Horticulture, 2018, Vol. 8, No. 1
Received: 24 Jul., 2018 Accepted: 20 Mar., 2019 Published: 30 Jun., 2019
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A field trial was conducted at the R&D Farm of Maharashtra State Grape Growers’ Association, Pune, India to assess the performance of Thompson Seedless and its clones, namely Tas-A-Ganesh and Sonaka on Dog Ridge rootstock. Brix-yield the ultimate measure of productivity in grape, particularly in raisin grapes, was more in Sonaka compared to the rest, which were at par. Dominance of yield/vine over Brix content was evident in determining the brix yield. Vine yield was more in Sonaka compared to other varieties because of more number of clusters in spite of less bunch weight. Factors impairing shoot maturity namely, shoot length and rate of shoot growth were more; NO3-N status was more and K status less after back pruning in Sonaka. Fruitfulness of buds as indicated by the cluster/cane ratio was more resulting in more clusters/vine in Sonaka, though the canes/vine was less. Yield increase in Sonaka was mediated through more cane diameter, shoot length on the 45th day and shoot growth rate during 30-45 days after back pruning; less number of shoots/vine and shoot length at veraison. Results of this trial revealed that Sonaka is the best variety on Dog Ridge for obtaining high yield of quality grapes and that the viticultural practices that increase the cane diameter, shoot length on the 45th day and shoot growth rate during 30-45 days after back pruning; and reduce the number of shoots/vine and shoot length at veraison might help increase the yield in Thompson Seedless and Tas-A- Ganesh.
Thompson Seedless; clones; Dog Ridge; Performance; Brix-yield
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International Journal of Horticulture
• Volume 8