 IVES 9 IVES Conference Series 9 The anthocyanin profile of galician endangered varieties. A tool for varietal selection

The anthocyanin profile of galician endangered varieties. A tool for varietal selection

Abstract

AIM: The current loss of genetic grapevine diversity is mainly due to the reduced number of varieties used for making wine. A way of preserved endangered varieties is the establishment of germplasm banks. The anthocyanin profile is a key factor in determining the oenological potential of red wine grape varieties. Thus, this work analyses the anthocyanin profiles of 29 varieties from the germplasm bank located in ¨Estación de Viticultura y Enología de Galicia¨ (EVEGA), Ourense (Galicia, Northwest Spain) in 2018 and 2019 seasons.

METHODS: At harvest, grapes were picked up and the anthocyanin substances were extracted and analyzed by HPLC (1, 2). Results were subjected to statistical analysis, ANOVA (factor variety) and Principal Component Analysis (PCA).

RESULTS: The anthocyanins were identified as the monoglucoside (GLU) acetylglucoside (AC) and p-coumaroylglucoside forms (CM) of cyanidin (Cy), delphinidin (Dp), malvidin (Mv), pelargonidin (Pel), peonidin (Pn) and petunidin (Pt). Sixteen compounds were identified and quantified (mg/Kg of berry fresh weight, FW). Significant diferences between varieties (p<0.001) were found for the biannual means of all compounds. MvG had the highest content in all varieties analyzed, with the exception of Zamarrica, Xafardán, Moscatel de Hamburgo and Brancellao. Respect to the rest of varieties, Sousón, Castañal, Ferrón, Espadeiro and Caíño Bravo (1832, 1323, 1327, 1173 and 1097 mg/Kg FW respectively) showed the highest contents of Total Anthocyanin. It is worth noting that these varieties belong to the same genetic population (3).These contents were higher than those found in Mencia (643 mg/Kg FW) and Tempranillo (891 mg/Kg FW), varieties widely cultivated in Galicia and Spain respectively.

Application of Principal Component Analysis (PCA) to experimental data showed a good separation of varieties according to the anthocyanin profile. (71.32 and 74.22 % of the total variance in 2018 and 2019 respectively). PCA also showed a group including Ferrón, Sousón, Castañal and Espadeiro varieties related to high contents of ΣGLU, ΣDel, ΣPet and ΣMal

CONCLUSION

Results demonstrated a high degree of anthocyanin profile difference between the varieties analyzed. Due to their anthocyanidin profile some of these varieties could play an important role in the red winery industry.

DOI:

Publication date: September 10, 2021

Issue: Macrowine 2021

Type: Article

Authors

Ángela Díaz Fernández

Viticulture and Oenology Station of Galicia [EVEGA] (Ourense, Galicia- Spain), Viticulture and Oenology Station of Galicia (EVEGA), Ourense (Galicia) 2 Technological Agri-Food Institute of Extremadura (CICYTEX, INTAEX), Badajoz (Extremadura).

Contact the author

Keywords

Vitis vinifera, red grapevine, germplasm bank, anthocyanidine

Citation

USING CHECK-ALL-THAT-APPLY (CATA) TO CATEGORIZE WINES: A DECISION-MAKING TOOL FOR WINE SELECTION

Bordeaux is the largest appellation vineyard in France. This contrasting vineyard with varied terroirs offers all styles of wine, resulting from the blending of several grape varieties. If these different profiles make the renown of Bordeaux wines, it can appear as a constraint when the aim is to study Bordeaux wines in their diversity. The selection of a representative sample can be performed by a sensory analysis carried out by trained panelists or by wine professionals, which can take several forms: consensus among experts, conventional descriptive analysis, typicality or quality evaluation. However, because of time, economic, and logistical constraints, these methods have limited applications. As an alternative to classical descriptive analysis, more intuitive methods that do not require training have been proposed recently to describe wines using an expert panel such as Napping, Free Choice or Flash Profiling, CATA or RATA.

Ozone treatment: a solution to improve sanitary and physiological quality of vine plant

The vineyard world is faced to a lot of fungal diseases. Grapevine Trunk Diseases (GTD) are some of the major. After exhibiting chronical foliar symptoms, grapevines can die by apoplexy within only few days. A range species of fungi was described to be associated with the apparition of early symptoms of GTD. It is well known that ozone dissolved into water is a powerful disinfectant with no remanence. The main goal of this study was to test the efficiency of this process on different fungal species associated with GTD in vitro and in planta conditions.

Variety “Rebula” (Vitis vinifera L.) determines the terroir Goriška brda “Collio” in Slovenia

A «terroir» is a group of vineyards from the same region, belonging to a specific appellation, and sharing the same type of soil, weather conditions, grapes and wine making savoir-faire, which contribute its specific personality to the wine. White wine variety «Rebula» or «Ribolla gialla» is a local and traditional variety, which is mentioned already in XIII. century like variety for tax paying and merchandise.

Identifying research opportunities at Douro Demarcated Region

The Douro Demarcated Region, in Northern Portugal, offers outstanding wines with unique characteristics. Due to the today’s globalized marketplace, local producers often need to further develop their cultivation techniques to remain competitive. The Association of Viticultural Development in the Douro Valley (ADVID) works as a unit of experimentation, offering services and training to meet the demands of the Douro’s vitiviniculturists.

Influence of the carbonic maceration winemaking method on the colour features of Tempranillo red wines

During recent years, carbonic maceration (CM) wines are increasingly demanded by consumers. The Spanish Rioja Qualified Designation of Origin (D.O.Ca. Rioja) is a winemaking area