COMPARISON OF TOURIGA NACIONAL WITH THREE PORTUGUESE MINOR GRAPEVINE VARIETIES ON CANOPY, PRODUCTION AND QUALITY IN THE DOURO REGION

• DOI: 10.22533/at.ed.97321722101210

• Palavras-chave: -

• Keywords: oenological potential; diversifying; yield; phenolic compounds

• Abstract:

  27. Some Portuguese minor grapevine varieties may reveal a good oenological
  28. potential for diversifying the wine market. Therefore, it is important to characterize
  29. them. This work has been carried out in the Douro Region and compared the
  30. Touriga Nacional variety with three Portuguese minor grapevine varieties (Preto
  31. Martinho, Malvasia Preta and Cornifesto). During 2016, 2017 and 2018 several
  32. parameters related to canopy, production and grape quality were determined.
  33. Radial visualization revealed eight relevant parameters for characterizing the
  34. differences among these varieties, showing that pruning weight was the main
  35. feature for Touriga Nacional, clusters weight for Malvasia Preta, must total
  36. soluble solids for Cornifesto and must tannins for Preto Martinho. According to
  37. the parameters analysed, Malvasia Preta showed the highest number of shoots
  38. and yield, Cornifesto stood out by the total soluble solids content. Preto Martinho
  39. exhibited the greatest richness in phenolic compounds (total polyphenols, tannins
  40. and total anthocyanins). In this study, Preto Martinho exhibited higher
  41. concentrations in total soluble solids, tannins, anthocyanins and polyphenols than
  42. Touriga Nacional, it might be the minor grapevine variety with the best profile for
  43. diversifying the wine market in the Douro Region.