Abstract

PEREZ-PELEA, Leneidy; BANDERA-FERNANDEZ, Evelyn; HERRERO, Juliette Valdés-Infante  and  VELAZQUEZ-PALENZUELA, Josefa Bárbara. Canonical correlation between vegetative and fruit characters in guava families (Psidium guajava L.). cultrop [online]. 2019, vol.40, n.3, e06.  Epub June 14, 2019. ISSN 0258-5936.

Guava is a crop of a great economic importance in tropical and subtropical regions of the world. The knowledge of the associations among agronomic importance characters has a great utility in breeding and cultivar selection programs. In the present study, canonical correlation analysis was used to estimate the relationship between vegetative and fruit traits, evaluated in three full-sib families of guava. The families were obtained from intraspecific controlled crosses, made at the Tropical Fruits Research Institute. Positives and significant genetic correlations were observed among the most of fruit traits. Few associations were detected among vegetative and fruit traits. A significant canonical correlation coefficient was only detected in the first pair of canonical varieties. The analysis indicated that, among vegetative traits, leaf width was the trait with the most contribution to the canonical varieties explanation in the guava full-sib families. Among fruit traits, number of seeds, fruit width and internal flesh thickness were the traits that most contribute to the canonical varieties’ estimates. With the use of canonical correlation analysis, it was determined that there is a low association between the groups of vegetative and fruit traits. For that reason, in these guava families, some of these traits group must not be used to predict the behavior of the other.

Keywords : plant breeding; selection; genetic correlation; multivariate analysis.

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