Author(s):
Castro, Rogério 
; Cruz, Amândio ; Amorim, Francisco ; Pereira, Giuliano ; Santos, João ; Lucas, Carlos ; Silva, Jorge Ricardo
Date: 2011
Persistent ID: http://hdl.handle.net/10400.5/5086
Origin: Repositório da UTL
Subject(s): grapevine; Cabernet Sauvignon; semi-arid climate; clone; adaptation; Brasil
Description
The variety Cabernet Sauvignon has revealed in the São
Francisco Valley (9º02' S; 40º11' W) a high potential of quality,
but with some limitations on its adaptation to this “terroir”. The
rootstocks with effective affinity are yet unknown and the material
with many virus infections makes difficult its culture, particularly
in terms of yield, which generally is very low.
With the objective to maximize the behaviour of this variety in
this terroir, a field trial was installed in Vinibrasil – Vinhos do
Brasil, SA to compare the relations “variety x rootstock”, with 5
clones (15, 169, 191, 337 and 685) combined with 6 rootstocks
(IAC-313, IAC-572, 1103-P, 420-A, 101-14 e SO4).
After seven harvests (two per year) consistent differences in
yield were observed, mainly due to the rootstock. These disparities
are due to the number of clusters and their medium weight.
Autochthonous rootstocks (obtained at the Instituto Agronômico
de Campinas), were those that generated the highest yield, with
the IAC-313 the most productive. With regard to rootstocks
commonly used in temperate climates, the 1103-P was one that
showed behaviour closer to the Brazilian rootstock. The rootstocks
with lower yields were generally the 101-14 Mgt and 420-A. At
the qualitative level, we found only minor differences and not
always in the same direction between the different rootstocks.
There were no significant differences in average yield or
quality among the different clones. Overall, the sensory analysis
of wines produced from the clones, indicates the clones 337 and
685 as being the most agreeable, especially in the parameters of
the aroma. The colour intensity is another parameter where those
two clones have higher comparative values. In another way, the
clone with lower colour intensity is the 191, which shows the
lower content of red anthocyanins.
These results show the possibility to growth C. Sauvignon in
tropical semi-arid climate, with acceptable yields and high quality.
On the another hand, in the establishment of new vineyards it is
essential to choose the correct combination (clone x rootstock) and
especially the appropriate rootstock
