Clonal selection in S0 and S1 peach trees evaluated in a subtropical environment

• Published in: Crop breeding and applied biotechnology 2021, Vol.21 (1)
• Main Authors: Silva, José Osmar da Costa e, Bruckner, Claudio Horst, Carneiro, Pedro Crescêncio Souza, Resende, Marcos Deon Vilela de, Alves, Rodrigo Silva, Ribeiro, Mariana Rodrigues, Silva, Danielle Fabíola Pereira da
• Format: Article
• Language: English
• Subjects: AGRONOMY; BIOTECHNOLOGY & APPLIED MICROBIOLOGY; Clonal selection; Clustering; Coefficient of variation; Fruit trees; Fruits; Multivariate analysis; Subtropical zones; Trees
• ISSN: 1518-7853; 1984-7033; 1984-7033
• DOI: 10.1590/1984-70332021v21n1a1

The aims of this study were to estimate genetic parameters, predict genotypic values, and analyze the genotypic divergence in S0 and S1 peach trees evaluated in a subtropical environment by the mixed model methodology. For this, twenty-two clones were evaluated for plant and fruit traits. Genotypic variance among clones was significant. The individual broad-sense heritabilities ranged from 0.11 to 0.84, and the individual repeatability coefficients ranged from 0.15 to 0.89. The genotypic coefficients of variation were higher than 10% for most of the traits. Clustering based on plant and fruit traits led to the formation of two and five mutually exclusive groups, respectively. Multivariate analysis of principal components indicated that some traits could be excluded from genetic evaluation. Considering the yield trait and the selection of five clones, predicted gain from selection was 70%, which shows the possibility of considerable genetic progress from clonal selection in peach trees.