Genetic divergence among peach palm progenies for palm heart characters

• Autor(a) principal: Negreiros, Jacson Rondinelli da Silva
• Data de Publicação: 2013
• Outros Autores: Bergo, Celso Luis, Miqueloni, Daniela Popim, Lunz, Aureny Maria Pereira
• Tipo de documento: Artigo
• Idioma: por
• Título da fonte: Pesquisa Agropecuária Brasileira (Online)
• Texto Completo: https://seer.sct.embrapa.br/index.php/pab/article/view/14451
• topic: Bactris gasipaes; clustering; multivariate analysis; canonical variables; Bactris gasipaes; agrupamento; análise multivariada; variáveis canônicas

The objective of this work was to estimate the genetic diversity of peach palm progenies, based on palm heart agronomic traits. A randomized block design was used in 10x10 triple lattice, with 100 treatments (progenies) and three replicates. The following evaluations were made: palm heart base mass, first-rate and second-rate palm heart productivity, number of plants per plot, and palm heart diameter. The genetic divergence was estimated by generalized Mahalanobis distance, as a dissimilarity measure, and by the Tocher optimization method and canonical variables, for group formation. The progenies formed 26 groups. Cumulative variance of the first three canonical variables was 75.12%. Plant per plot and second-rate palm heart mass, indirectly related to the first-rate palm heart mass, were the most important characters in the discrimination of progenies, in the first canonical variable (35.77%). Mass of the palm heart base was indirectly related to the second-rate palm heart productivity and number of plants per plot, in the second canonical variable (22.93%), and to the first-rate palm heart productivity in the third canonical variable (16.42%). Seventeen progenies of four divergent groups (G3, G5, G11 and G12) have potential for selection as to palm heart yield in the breeding program of peach palm.