Studies on inverted bottleneck symptom in grapevines (Vitis vinifera L.) raised on rootstocks

Studies on inverted bottleneck symptom with different degrees of stock: scion ratios were conducted in Tas-A-Ganesh grafted on Dogridge and 1613 C rootstocks. Incidence of inverted bottleneck symptom was more on Dogridge than in 1613 C indicating Dogridge imparts more vigour to scions. The performance of vines with different degrees of stock: scion ratios did not show any significant difference in growth and yield parameters indicating that different degrees of stock: scion ratios does not have effect on growth and yield of grafted vines. A long-term study in this line is needed to know the influence of inverted bottleneck symptom on performance of vines with respect to yield and quality.