ESTIMATES OF GENETIC PARAMETERS USING RELM/BLUP FOR INTRA-POPULATIONAL GENETIC BREEDING OF Platonia insignis Mart.

Maria Clideana Cabral Maia,Luís Cláudio Oliveira,Marcos Deon Vilela Resende,João Pedro Alves Aquino,Luciano Medina Macedo,Lúcio Flavo Lopes Vasconcelos

doi:10.1590/0100-67622016000300020

Abstract

ABSTRACT The aim of this study was to estimate genetic parameters to support the selection of bacuri progenies for a first cycle of recurrent selection, using the REML/BLUP (restricted maximum likelihood/best linear unbiased prediction) procedure to estimate the variance components and genotypic values. Were evaluated twelve variables in a total of 210 fruits from 39 different seed trees, from a field trial with an experimental design of incomplete blocks with clonal replies among subplots. The three variables related with the fruit development (weight, diameter, length) showed strong correlation, and where fruit length showed higher heritability and potential to be used for indirect selection. Among the 39 progenies evaluated in this study, five present potential to compose the next cycle of recurrent selection, due they hold good selection differential either to agrotechnological variables as to development of bacuri fruit.

Highlights

Bacuri (Platonia insignis MART.) is an Amazonian fruit tree species of large size often present in dense forests, whose center of origin is estimated to be in the state of Pará (NASCIMENTO et al, 2007)
Despite the correlations observed in this study indicate that fruits which develop more present a higher content of soluble solids, which is a property related to the taste of the fruit, the variables weight, diameter and length of the fruits were not significantly correlated with pulp content, what would be another very important property for consumers of the bacuri fruit
The variables associated with the fruit development are strongly correlated with the productivity of the bacuri tree, but according to the obtained results, except for the variable fruit length, the fruit variables weight and diameter presented zero heritability, mainly due to strong influence of the experimental structures acting in conjunction with the wide variability present in the experimental area

Summary

Introduction

Bacuri (Platonia insignis MART.) is an Amazonian fruit tree species of large size often present in dense forests, whose center of origin is estimated to be in the state of Pará (NASCIMENTO et al, 2007). The bacuri tree is considered a indigenous species, but it has high economic potential by presenting multiple uses, producing both high quality wood that is very resistant to decay and the fruit in abundance during the fruiting period (MORAES et al, 1994; SOUZA et al, 2000). The evolution of food preservation techniques enabled the bacuri fruit to be available for consumption throughout the year and exported to new consumer markets (FONTENELE et al, 2010; SILVA et al, 2010). In the Piauí state, the fruit of bacuri is mainly used in the manufacture of juices and sweets (NAZARÉ, 2000), while from seeds is possible to extract a type of fat commonly used by native communities for the treatment of various diseases in humans and animals (SANTOS JUNIOR et al, 2010)

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Conclusion