Abstract

Cultivation of Red Globe grapes is gaining popularity in mild tropical climate of India owing to its bold berries and attractive red colour and better shelf life this fetching better price in market. Dogridge is the preferred rootstock in India because of its wide adoptability in different soil and climatic conditions beside its tolerance to drought and salinity. Though most of the commercial grape varieties are grafted on Dogridge rootstock, the success of grafting Red Globe onto Dogridge is very less or it needs repeated grafting for vineyard establishment. Among different rootstocks, Red Globe grafted on 110R and 66/4 (hybrid rootstock of St. George×1103P) recorded maximum graft success while it was only 41.18% on Dogridge rootstock. Higher graft success on these rootstocks might be due to biochemical status of mother plants at the time of grafting where 110R and 66/4 recorded highest carbohydrates, proteins, total phenols and dry matter content which was least on SO4 and Freedom rootstocks. The correlation between enzymes like polyphenol oxidase and peroxidase also plays major role in improving graft success which is evident in the present study.

Keywords: Dogridge; Graft success; Red globe; Rootstocks