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Combinación de estrategias clásicas y marcadores genéticos para la domesticación de la cherna (Polyprion americanus): una especie candidata de alto potencial acuícola

Authors: Pérez, M. (Montse); Matusse, N. (Nédia); Pita, A. (Alfonso); Peleteiro-Alonso, J.B. (José Benito); Trucco, M.I. (María Inés); Vilar, A. (Antonio); Presa, P. (Pablo);

Combinación de estrategias clásicas y marcadores genéticos para la domesticación de la cherna (Polyprion americanus): una especie candidata de alto potencial acuícola

Abstract

The wreckfish Polyprion americanus is a long-living pelagic fish wilh a demersal adult phase Ihat shows an antitropical distribution. Therelore n~ one 01 Ihe most promising species tor aquacuture and consequenHy tt has recenHy been brought to Galician hatcheries lor taming. These good priors lor aquacuhure are however devoid 01 uselul inlormation on its whole life cycle, taxonomic classifocation and genetic status. It is well known Ihat domestication and management 01 hatchery stocks require an adequate strategy lor Ihe initial broodstock loundation and its further reproductive management. In this study we have lirst isolated new microsatelltte rnarkers lor ecumenical tasks in Ihis species. Then we have appIied Ihose rnarkers to assess Ihe genetic status ollhe lour wreckfish stocks being harvested in Galician hatcheries as companed to Ihe genetic diversity present in its source population Irom Ihe Eastem Mantic. Since Ihe first successful spawning 01 wreckfish in captivtty has recenHy been achieved ~ a Galician hatchery, we provide here Ihe first assessment on Ihe reproductive structure 01 such stock, based on Ihe genetic assignmenl of iIs progenies. Preliminary resuíts show a significant genetic differentiation (2.25% 01 the whole inter-stock genetic variance) among broodstocks from the lour Galician hatcheries and a pronounced loss 01 diversity in twoofthem regarding the genetic richness ofthe wild source population.

La chema, Polyprion americanus, es un pez pelágico muy longevo, con una lase adulta demersal que muestra una distribución antitropical. Está considerada como una de las especies más prometedoras para la acuicuñura y, en consecuencia, se han comenzado a domesticar 5 stocks en Galicia. A pesar de las buenas condiciones para la acuicultura no existe suliciente inlormación sobre su ciclo de vida completo, su clasificación taxonómica y estatus genético. Es sabido que se requiere una estrategia adecuada para la lundación del stock de reproductores y su manejo reproductivo, y por ello en este estudio hemos aislado nuevos marcadores microsatélites para tareas ecuménicas en esta especie. Estos marcadores se han aplicado a la evaluación de la diversidad genética de las poblaciones de chema en piscifactorías gallegas y se han oomparaoo con la diversidad genética de su población de origen en el Atíánneo oriental. Como el primer desove de chema en cautiverio se ha obtenido recientemente en Galicia, en este trabajo presentamos la primera evaluación de la estructura reproductiva basada en la asignación de progenies. Los resultados muestran una diferenciación genética signifocativa (2.25 de la varianza genética inter-stock) entre los 4 stocks de reproductores analizados en este trabajo y una pronunciada pérdida de diversidad en dos de ellas con respecto a la riqueza genética de la población de origen.

Country
Spain
Keywords

Acuicultura, Centro Oceanográfico de Vigo

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selected citations
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This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
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popularity
This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
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This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
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