When doing your research you should specifically focus on the rootstocks in the list since they are quite diverse and result from different crossing combinations. Also, while going into the literature, explore the material and methods,
Literature Review about 7 different rootstock used in Chardonnay, focusing on vigour and irrigation characteristics.
Differentiate between trials that included irrigations from those that excluded irrigation.
List Of rootstock
1103
3309
420 A
K51-32
Own roots,
Ramsey,
Riparia Gloire
There is one resource in here http://plantgrape.plantnet-project.org/
Write a literature Review about 7 different rootstock used in Chardonnay, focusing on vigour and irrigation characteristics.