Genetic variability in Tambaqui generations of the breeding program in the Central-West Region of Brazil

Authors

DOI:

https://doi.org/10.5433/1679-0359.2021v42n3Supl1p1785

Keywords:

Colossoma macropomum, Native species, Genetic improvement, Microsatellites.

Abstract

The implementation of fish breeding programs in Brazil has brought significant results in the productivity of tilapia. However, the insertion of native species with great potential (such as Tambaqui Colossoma macropomum) in these programs is still recent, and thus requires genetic information for monitoring and enabling their consolidation into the programs. The objective of the present study was to evaluate the genetic diversity of the parental generation (G0) and two consecutive generations (G1 and G2) in the C. macropomum genetic improvement program, located in the municipality of Sorriso, Mato Grosso, Brazil. Ninety caudal fin samples were collected (30 samples per generation) for DNA extraction. The genetic study implemented seven microsatellite markers (Cm1A8, Cm1A11, Cm1D1, Cm1E3, Cm1F4, Cm1F5, and Cm1H8). A total of 17 alleles were amplified, with variations in the mean number between four to two alleles per locus. The size per locus ranged from 170 to 360 bp. The average inbreeding coefficient was 0.126 (G0), -0.040 (G1), and 0.131 (G2). No null or exclusive alleles were found. The observed heterozygosity values for G1 and G2 demonstrated the preservation of genetic variability (0.453 and 0.409, respectively). In conclusion, the genetic diversity of the parental generation (G0) and the two progenies generations (G1 and G2) were adequate, which demonstrates that the genetic improvement program was conducted correctly; however, it is important to continue to evaluations the genetic diversity of the future progeny.

Author Biographies

Angela Maria Urrea-Rojas, State University of Londrina

Ph.D. Student at the Postgraduate Program in Animal Science, State University of Londrina, UEL, Londrina, PR, Brazil.

Annaiza Braga Bignardi, Federal University of Rondonópolis

Profa Dra, Institute of Agricultural and Technological Sciences, Federal University of Rondonópolis, UFR, Rondonópolis, MT, Brazil.

Felipe Pinheiro de Souza, State University of Londrina

Ph.D. Student at the Postgraduate Program in Animal Science, State University of Londrina, UEL, Londrina, PR, Brazil.

Ed Christian Suzuki de Lima, State University of Londrina

Ph.D. Student at the Postgraduate Program in Animal Science, State University of Londrina, UEL, Londrina, PR, Brazil.

Denise Rocha Ayres, Federal University of Rondonópolis

Profa Dra, Institute of Agricultural and Technological Sciences, Federal University of Rondonópolis, UFR, Rondonópolis, MT, Brazil.

Jayme Aparecido Povh, Federal University of Mato Grosso do Sul

Prof. Dr., Faculty of Veterinary Medicine and Animal Science, Federal University of Mato Grosso do Sul, UFMS, Campo Grande, MS, Brazil.

Américo Moraes Neto, Federal University of Mato Grosso do Sul

Student at the graduate in Animal Science, Faculty of Veterinary Medicine and Animal Science, Federal University of Mato Grosso do Sul, UFMS, Campo Grande, MS, Brazil.

Andrei Lincoln Yamachita, State University of Londrina

Ph.D. Student at the Postgraduate Program of Biotechnology, UEL, Londrina, PR, Brazil.

Mariana Stucki Alves, Federal University of Rondonópolis

Student at the Institute of Agricultural and Technological Sciences, Federal University of Rondonópolis, UFR, Rondonópolis, MT, Brazil.

Nelson Mauricio Lopera-Barrero, State University of Londrina

Prof. Dr., Department of Animal Science and Postgraduate Program in Animal Science, UEL, Londrina, PR, Brazil.

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Published

2021-04-22

How to Cite

Urrea-Rojas, A. M., Bignardi, A. B., Souza, F. P. de, Lima, E. C. S. de, Ayres, D. R., Povh, J. A., … Lopera-Barrero, N. M. (2021). Genetic variability in Tambaqui generations of the breeding program in the Central-West Region of Brazil. Semina: Ciências Agrárias, 42(3Supl1), 1785–1796. https://doi.org/10.5433/1679-0359.2021v42n3Supl1p1785

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