Imputation of genetic composition for missing pedigree data in Serrasalmidae using morphometric data

Authors

  • Adriano Carvalho Costa Goiano Federal Institute; Dept. of Animal Science
  • Marcio Balestre Federal University of Lavras; Dept. of Exact Science
  • Hortência Aparecida Botelho Federal University of Lavras; Dept. of Animal Science
  • Rilke Tadeu Fonseca de Freitas Federal University of Lavras; Dept. of Animal Science
  • Richardson Cesar da Silva Gomes Federal University of Lavras; Dept. of Animal Science
  • Sérgio Augusto de Sousa Campos Federal University of Lavras; Dept. of Food Science
  • Fábio Porto Foresti São Paulo State University; School of Sciences; Biological Sciences Dept
  • Diogo Teruo Hashimoto São Paulo State University; FCAV; Biological Sciences Dept
  • Diego Galetti Martins São Paulo State University; School of Sciences; Biological Sciences Dept
  • Fernanda Dotti do Prado São Paulo State University; School of Sciences; Biological Sciences Dept
  • Maria Andreia Corrêa Mendonça Goiano Federal Institute; Dept. of Animal Science

DOI:

https://doi.org/10.1590/1678-992x-2016-0251

Keywords:

Colossoma spp., Piaractus spp., breeding, mixture model, round fish

Abstract

This study aimed to impute the genetic makeup of individual fishes of Serrasalmidae family on the basis of body weight and morphometric measurements. Eighty-three juveniles, belonging to the genetic groups Pacu, Pirapitinga, Tambaqui, Tambacu, Tambatinga, Patinga, Paqui and Piraqui, were separated into 16 water tanks in a recirculation system, with two tanks per genetic group, where they remained until they reached 495 days of age. They were then weighed and analyzed according to the following morphometric parameters: Standard Length (SL), Head Length (HL), Body Height (BH), and Body Width (BW). The identity of each fish was confirmed with two SNPs and two mitochondrial markers. Two analyses were performed: one for the validating the imputation and another for imputing a genetic composition of animals considered to be advanced hybrids (post F1). In both analyses, we used linear mixed models with a mixture of normal distributions to impute the genetic makeup of the fish based on phenotype. We applied the mixed models method, whereby the environmental effects were estimated by the Empirical Best Linear Unbiased Estimator (EBLUE) and genetic effects are considered random, obtaining the Empirical Best Linear Unbiased Predictor (EBLUP) from the general (GCA) and the specific (SCA) combining ability effects. The results showed that validation of the genetic makeup imputation based on body weight can be used because of the strong correlation between the observed and imputed genotype. The fish classified as advanced hybrids had a genetic composition with a high probability of belonging to known genotypes and there was consistency in genotype imputation according to the different characteristics used.

Downloads

Download data is not yet available.

Downloads

Published

2017-12-01

How to Cite

Costa, A. C., Balestre, M., Botelho, H. A., Freitas, R. T. F. de, Gomes, R. C. da S., Campos, S. A. de S., Foresti, F. P., Hashimoto, D. T., Martins, D. G., Prado, F. D. do, & Mendonça, M. A. C. (2017). Imputation of genetic composition for missing pedigree data in Serrasalmidae using morphometric data. Scientia Agricola, 74(6), 443-449. https://doi.org/10.1590/1678-992x-2016-0251

Issue

Section

Animal Science and Pastures