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Article

Investigation of Sexes and Fertility Potential of Female Russian Sturgeon (Acipenser gueldenstaedtii) and Male American Paddlefish (Polyodon spathula) Hybrids

by
Katalin Bogár
1,2,†,
Jelena Stanivuk
1,2,†,
Aliz Géczi
1,2,
Georgina Lea Fazekas
1,2,
Balázs Kovács
3,
Bence Lázár
4,5,
Mariann Molnár
2,4,
László Ardó
1,
Uroš Ljubobratović
1,
Gyula Kovács
1,
Dániel Péter
3,
Eszter Várkonyi
4,† and
Jenő Káldy
1,*,†
1
Research Centre for Fisheries and Aquaculture, Institute of Aquaculture and Environmental Safety, Hungarian University of Agriculture and Life Sciences, H-5540 Szarvas, Hungary
2
PhD School of Animal Biotechnology and Animal Science, Hungarian University of Agriculture and Life Sciences, H-2100 Gödöllő, Hungary
3
Department of Molecular Ecology, Institute of Aquaculture and Environmental Safety, Hungarian University of Agriculture and Life Sciences, H-2100 Gödöllő, Hungary
4
Institute for Farm Animal Gene Conservation, National Centre for Biodiversity and Gene Conservation, H-2100 Gödöllő, Hungary
5
Animal Biotechnology Department, Institute of Genetics and Biotechnology, Hungarian University of Agriculture and Life Sciences, H-2100 Gödöllő, Hungary
*
Author to whom correspondence should be addressed.
†
These authors contributed equally to this work.
Life 2024, 14(7), 818; https://doi.org/10.3390/life14070818
Submission received: 30 April 2024 / Revised: 16 June 2024 / Accepted: 21 June 2024 / Published: 27 June 2024
(This article belongs to the Special Issue Innovative Aquaculture and Fish Reproduction)
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Abstract

In the present study, 10 allotriploid (3nALT) and 10 allopentaploid (5nALP) six-month-old hybrid fish and two 3nALT and four 5nALP 40-month-old hybrid fish, which resulted by crossing female Russian sturgeon Acipenser gueldenstaedtii (Brandt and Ratzeberg, 1833) and male American paddlefish Polyodon spathula (Walbaum, 1792), were investigated. It was revealed that six-month-old 3nALT and 5nALP hybrids initially had “undifferentiated” gonads, while in the 40-month-old hybrids, only testes were observed in one case of 3nALT and one case of 5nALP hybrids. The testis of 3nALT hybrids was partially developed with spermatogonia, while the testis of one 5nALP hybrid was in the second developmental stage with low spermatogonia density. We could not determine gonad differentiation in any of the cases when the hybrid individuals had the W sex chromosome. We concluded that the gonad differentiation of these interfamilial hybrids follows a similar pattern to interspecific hybrids of different ploidy parent species of the family Acipenseridae, which is consistent with the classical Haldane’s rule. However, it cannot be excluded that the testis of this/these hybrid(s) may produce fertile sperm after sexual maturity, depending on additional genetic, hormonal and environmental factors, and further research is required for its evaluation.
Keywords: ploidy level; gonad; testis; spermatogonia; interfamilial hybrids ploidy level; gonad; testis; spermatogonia; interfamilial hybrids

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MDPI and ACS Style

Bogár, K.; Stanivuk, J.; Géczi, A.; Fazekas, G.L.; Kovács, B.; Lázár, B.; Molnár, M.; Ardó, L.; Ljubobratović, U.; Kovács, G.; et al. Investigation of Sexes and Fertility Potential of Female Russian Sturgeon (Acipenser gueldenstaedtii) and Male American Paddlefish (Polyodon spathula) Hybrids. Life 2024, 14, 818. https://doi.org/10.3390/life14070818

AMA Style

Bogár K, Stanivuk J, Géczi A, Fazekas GL, Kovács B, Lázár B, Molnár M, Ardó L, Ljubobratović U, Kovács G, et al. Investigation of Sexes and Fertility Potential of Female Russian Sturgeon (Acipenser gueldenstaedtii) and Male American Paddlefish (Polyodon spathula) Hybrids. Life. 2024; 14(7):818. https://doi.org/10.3390/life14070818

Chicago/Turabian Style

Bogár, Katalin, Jelena Stanivuk, Aliz Géczi, Georgina Lea Fazekas, Balázs Kovács, Bence Lázár, Mariann Molnár, László Ardó, Uroš Ljubobratović, Gyula Kovács, and et al. 2024. "Investigation of Sexes and Fertility Potential of Female Russian Sturgeon (Acipenser gueldenstaedtii) and Male American Paddlefish (Polyodon spathula) Hybrids" Life 14, no. 7: 818. https://doi.org/10.3390/life14070818

APA Style

Bogár, K., Stanivuk, J., Géczi, A., Fazekas, G. L., Kovács, B., Lázár, B., Molnár, M., Ardó, L., Ljubobratović, U., Kovács, G., Péter, D., Várkonyi, E., & Káldy, J. (2024). Investigation of Sexes and Fertility Potential of Female Russian Sturgeon (Acipenser gueldenstaedtii) and Male American Paddlefish (Polyodon spathula) Hybrids. Life, 14(7), 818. https://doi.org/10.3390/life14070818

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