Hybridization of russian sturgeon (Acipenser gueldenstaedtii, Brandt and Ratzeberg, 1833) and american paddlefish (Polyodon spathula, Walbaum 1792) and evaluation of their progeny

Jenő Káldy, Attila Mozsár, Gyöngyvér Fazekas, Móni Farkas, Dorottya Lilla Fazekas, Georgina Lea Fazekas, Katalin Goda, Zsuzsanna Gyöngy, Balázs Kovács, Kenneth Semmens, Miklós Bercsényi, Mariann Molnár, Eszter Patakiné Várkonyi

Research output: Contribution to journalArticle

Abstract

Two species from the families Acipenseridae and Polyodontidae, Russian sturgeon (Acipenser gueldenstaedtii, Brandt and Ratzeberg, 1833; functional tetraploid) and American paddlefish (Polyodon spathula, Walbaum 1792, functional diploid) were hybridized. The hybridization was repeated using eggs from three sturgeon and sperm from four paddlefish individuals. Survival in all hybrid family groups ranged from 62% to 74% 30 days after hatching. This was the first successful hybridization between these two species and between members of the family Acipenseridae and Polyodontidae. Flow cytometry and chromosome analysis revealed two ploidy levels in hybrids. The chromosome numbers of the hybrids ranged between 156–184 and 300–310, in “functional” triploids and “functional” pentaploids, respectively. The hybrid origin and the ploidy levels were also confirmed by microsatellite analyses. In hybrids, the size and the number of dorsal and ventral scutes correlated with the ploidy levels as well as with the calculated ratio of the maternal and paternal chromosome sets. An extra haploid cell lineage was found in three hybrid individuals irrespective of the ploidy level, suggesting polyspermy. Although the growth performance showed high variance in hybrids (mean: 1.2 kg, SD: 0.55), many individuals reached a size of approximately 1 kg by the age of one year under intensive rearing conditions.

Original languageEnglish
Article number753
Pages (from-to)1-17
Number of pages17
JournalGenes
Volume11
Issue number7
DOIs
Publication statusPublished - Jul 2020

Keywords

  • Chromosome number
  • Morphology
  • Paternal haploid cell lineage
  • Ploidy level
  • Sturgeon

ASJC Scopus subject areas

  • Genetics
  • Genetics(clinical)

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    Káldy, J., Mozsár, A., Fazekas, G., Farkas, M., Fazekas, D. L., Fazekas, G. L., Goda, K., Gyöngy, Z., Kovács, B., Semmens, K., Bercsényi, M., Molnár, M., & Várkonyi, E. P. (2020). Hybridization of russian sturgeon (Acipenser gueldenstaedtii, Brandt and Ratzeberg, 1833) and american paddlefish (Polyodon spathula, Walbaum 1792) and evaluation of their progeny. Genes, 11(7), 1-17. [753]. https://doi.org/10.3390/genes11070753