Using genotype simulations and Bayesian analyses to identify individuals of hybrid origin in Australian bass

Lessons for fisheries management

T. S. Schwartz, L. B. Beheregaray*

*Corresponding author for this work

Research output: Contribution to journalArticle

22 Citations (Scopus)

Abstract

Simulated genotypes, Bayesian analyses and molecular genetic data were used to detect individuals of hybrid origin and hybrid introgression between the Australian bass (Macquaria novemaculeata), a species extensively stocked in Australia, and estuary perch (Macquaria colonorum). Based on this analytical framework, 93% of the hybrids up to three generations later could be distinguished from the Australian bass. Individuals of hybrid origin were identified in all three rivers sampled. In addition, this study verified the fertility of hybrids between Australian bass and estuary perch as determined through genomic introgression. This study exemplifies an analytical procedure that has implications for identifying suitable individuals for use in breeding and restocking programmes for other species.

Original languageEnglish
Pages (from-to)435-450
Number of pages16
JournalJournal of Fish Biology
Volume72
Issue number2
DOIs
Publication statusPublished - Feb 2008

Keywords

  • Assignment tests
  • Conservation genetics
  • Genetic structure
  • Hybridization
  • Introgression
  • Microsatellites

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