Assessment of yellowtail kingfish (Seriola lalandi) as a surrogate host for the production of southern bluefin tuna (Thunnus maccoyii) seed via spermatogonial germ cell transplantation
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Smith, A
Bubner, E
Yoshizaki, G
Takeuchi, Y
Yazawa, R
Chen, BN
Cummins, S
Elizur, A
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Abstract
Germ cell transplantation is an innovative technology for the production of interspecies surrogates, capable of facilitating easier and more economical management of large-bodied broodstock, such as the bluefin tuna. The present study explored the suitability of yellowtail kingfish (Seriola lalandi) as a surrogate host for transplanted southern bluefin tuna (Thunnus maccoyii) spermatogonial cells to produce tuna donor-derived gametes upon sexual maturity. Germ cell populations in testes of donor T. maccoyii males were described using basic histology and the molecular markers vasa and dead-end genes. The peripheral area of the testis was found to contain the highest proportions of dead-end-expressing transplantable Type A spermatogonia. T. maccoyii Type A spermatogonia-enriched preparations were transplanted into the coelomic cavity of 6–10-day-old post-hatch S. lalandi larvae. Fluorescence microscopy and polymerase chain reaction analysis detected the presence of tuna cells in the gonads of the transplanted kingfish fingerlings at 18, 28, 39 and 75 days after transplantation, indicating that the transplanted cells migrated to the genital ridge and had colonised the developing gonad. T. maccoyii germ cell-derived DNA or RNA was not detected at later stages, suggesting that the donor cells were not maintained in the hosts’ gonads.
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Reproduction, Fertility and Development
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28
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12
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Biological sciences
Agricultural, veterinary and food sciences
Biomedical and clinical sciences
Animal production
Zoology
Reproductive medicine
Science & Technology
Life Sciences & Biomedicine
Developmental Biology
Reproductive Biology
Zoology
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Bar, I; Smith, A; Bubner, E; Yoshizaki, G; Takeuchi, Y; Yazawa, R; Chen, BN; Cummins, S; Elizur, A, Assessment of yellowtail kingfish (Seriola lalandi) as a surrogate host for the production of southern bluefin tuna (Thunnus maccoyii) seed via spermatogonial germ cell transplantation, Reproduction, Fertility and Development, 2016, 28 (12), pp. 2051-2064