Genetic Diversity Among Brazilian Grape Cultivars Reveals High-Value Attributes

Research conducted by Brazilian Agricultural Research Corporation (EMBRAPA) in collaboration with Coordenacao de Aperfeicoamento de Pessoal de Nivel Superior (CAPES) has shed new light on the genetic diversity of Brazilian grape cultivars. The study, published in the journal Genetic Resources and Crop Evolution, utilized self-organizing maps to evaluate the quality attributes and bioactive compounds of the fruit, providing valuable insights for plant breeding and grape growers. This research aims to identify genotypes with high content quality attributes for future research efforts.

Key Takeaways:

• Thirty-six grape cultivars were evaluated over two consecutive crop seasons, considering 11 variables related to berry color, firmness, soluble solids, acidity, and bioactive compounds.
• The variance components were estimated using restricted maximum likelihood/best linear unbiased prediction (REML/BLUP), showing high individual repeatability for most variables (ranging from 0.40 to 0.93).
• Cluster analysis using self-organizing maps resulted in the formation of five groups, with groups 1, 2, and 3 sharing importance of lightness and chroma variables, and groups 4 and 5 showing proximity based on hue angle, berry firmness, and soluble-solids content.
• The study suggests that the genetic variability among Brazilian grape cultivars can be utilized to identify genotypes with high-quality attributes, with potential applications for grape growers and development of new cultivars for the Brazilian semi-arid region.

Statistics:

• 36 grape cultivars were evaluated in the study.
• 11 variables related to berry color, firmness, soluble solids, acidity, and bioactive compounds were considered.
• Individual repeatability (r) ranged from 0.40 to 0.93 for most variables.
• Mean selective accuracy was high, ranging from 0.76 to 0.97.
• Five clusters were formed based on self-organizing maps analysis.

Sources:

• Genetic Diversity Among Brazilian Grape Cultivars Based On the Quality and Bioactive Compounds of the Fruit Using Self-organizing Maps. Genetic Resources and Crop Evolution, 2025.
• Brazilian Agricultural Research Corporation (EMBRAPA)
• Coordenacao de Aperfeicoamento de Pessoal de Nivel Superior (CAPES)
• NewsRx LLC - NewsRx. Data from Brazilian Agricultural Research Corporation Provide New Insights into Agriculture (Genetic Diversity Among Brazilian Grape Cultivars Based On the Quality and Bioactive Compounds of the Fruit Using Self-organizing Maps). Agriculture Week. August 14, 2025; p 31.