Descriptor: 018 Mature leaf: blistering of upper side (018 MATURE LEAF: BLISTERING OF)



 
Definition:
Observation from berry set to veraison. Blisters between the veins of ultimate order have to be assessed. Mean value of 10 mature leaves above the clusters at the medium third of shoot (N1-N3=main veins).
Crop:
Vitis vinifera L.
Category:
Morphological descriptors
Status:
Crop Germplasm Committee approved
Data Type:
Alpha/numeric descriptor
Maximum Length:
1
Responsible Site:
SYSTEM (SYS)

Distribution of Values for 018 Mature leaf: blistering of upper side (018 MATURE LEAF: BLISTERING OF)

CodeDefinitionNumber of Accessions
1absent or very weak (Rupestris du Lot, Garnacha Tinta B)77
2weak (Chrupka bílá B, Garganega B)170
3medium (Mueller-Thurgau B, Semillon B)189
4strong (Merlot N,Ryzlink rýnský B)41
5very strong (V. amurensis)10