Genetic parameters of fruit and seed biometric characteristics in Pachira aquatica Aubl.
Pachira aquatica is a tree whose fruits and seeds are used for human and animal nutrition in tropical regions . However, no research of its genetic variability have yet been reported to choose the best breeding method for the species . The objective of the study was to evaluate the genetic parameters of the biometric characteristics of the fruit and its seeds . The study was conducted at the Universidad de Córdoba, Colombia . Ten trees were selected and, of each, 10 fruits were randomly selected . Analysis of variance and estimation of genetic parameters were carried out for 15 characteristics of both organs . Significant differences were detected between trees for weight/fruit (FW), weight of husk/fruit (FHW), percentage of seeds/fruit (FSP), seed width (SW), seed thickness (ST), volume of a seed (S1V) and density of a seed (S1D) . The greatest estimators of genetic variability were presented in ST, FSP, FHW and FW, where the genetic component represented more than 50% of the phenotypic variance . The highest heritability, both broad (h2A>76%) and narrow (h2E>30%), was for ST and FSP . The expected genetic gain, as a percentage of the general average, was less than 10% in 14 of the 15 characteristics studied, except for FHW (10 .86%), therefore a modest genetic progress is expected for such characteristics . It is recommended to increase the local population genetic base and make genetic assays in several potential producing areas .
| Main Authors: | , , |
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| Format: | Digital revista |
| Language: | spa |
| Published: |
Universidad de Ciencias Aplicadas y Ambientales U.D.C.A
2018
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| Online Access: | https://revistas.udca.edu.co/index.php/ruadc/article/view/660 |
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| Summary: | Pachira aquatica is a tree whose fruits and seeds are used for human and animal nutrition in tropical regions . However, no research of its genetic variability have yet been reported to choose the best breeding method for the species . The objective of the study was to evaluate the genetic parameters of the biometric characteristics of the fruit and its seeds . The study was conducted at the Universidad de Córdoba, Colombia . Ten trees were selected and, of each, 10 fruits were randomly selected . Analysis of variance and estimation of genetic parameters were carried out for 15 characteristics of both organs . Significant differences were detected between trees for weight/fruit (FW), weight of husk/fruit (FHW), percentage of seeds/fruit (FSP), seed width (SW), seed thickness (ST), volume of a seed (S1V) and density of a seed (S1D) . The greatest estimators of genetic variability were presented in ST, FSP, FHW and FW, where the genetic component represented more than 50% of the phenotypic variance . The highest heritability, both broad (h2A>76%) and narrow (h2E>30%), was for ST and FSP . The expected genetic gain, as a percentage of the general average, was less than 10% in 14 of the 15 characteristics studied, except for FHW (10 .86%), therefore a modest genetic progress is expected for such characteristics . It is recommended to increase the local population genetic base and make genetic assays in several potential producing areas . |
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