Heritability, genetic correlations and genotype-environment interactions for growth and survival of larvae and post-larvae of the Caribbean scallop, Argopecten nucleus (Mollusca: Bivalvia)

dc.contributor.author Barros Gómez, Judith Margarita
dc.contributor.author Winkler, Federico
dc.contributor.author Velasco Cifuentes, Luz Adriana
dc.date.accessioned 2018-10-09T19:25:01Z
dc.date.available 2018-10-09T19:25:01Z
dc.date.issued 2018-10-10
dc.description.abstract Abstract: The Caribbean scallop Argopecten nucleus is a species with a great potential for commercial aquaculture in the Caribbean given its fast growth and the availability of culture technology. However, its production relies completely on hatchery-reared seed, and the survival in early stages, particularly during the settling process, is the main limitation for this activity to become cost effective. Thus, in order to assess the feasibility of improving survival of larvae and post-larvae of A. nucleus through genetic selection without affecting growth, it was estimated the heritability and the genotype-environment interactions for such traits, as well as the genetic correlations between them. These parameters were estimated based on intraclass correlations of 40 full-sib families (10 half-sib families) at 1, 11 and 75 days post fertilization. Heritability values were very high for the post-larvae survival (0.49), while it was low and not significant for larvae survival (≤0.07) and medium to high for growth traits of larvae and post-larvae (>0.3). The traits analyzed in post-larvae exhibited significant genotype-environment interactions in relation to culture depth in the sea. No significant genetic correlations between the measured traits were found. The results suggest the existence of an important genetic component in the variation of post-larval survival, and larval and post-larval growth, as well as a high potential response to direct genetic selection, especially for post-larval survival (50% increase per generation), without affecting the growth traits.<br /> Resumen: El núcleo Argopecten, una vieira caribeña, es una especie con un gran potencial para la acuicultura comercial en el Caribe debido a su rápido crecimiento y la disponibilidad de tecnología de cultivo. Sin embargo, su producción se basa completamente en semillas cultivadas en criaderos, y la supervivencia en las etapas iniciales, particularmente durante el proceso de asentamiento, es la principal limitación para que esta actividad sea rentable. Por lo tanto, para evaluar la viabilidad de mejorar la supervivencia de larvas y postlarvas de A. nucleus a través de la selección genética sin afectar el crecimiento, se estimó la heredabilidad y las interacciones genotipo-ambiente para tales rasgos, así como las correlaciones genéticas.entre ellos. Estos parámetros se estimaron en función de las correlaciones intraclase de 40 familias de hermanos completos (10 familias de hermanos medios) a los 1, 11 y 75 días posteriores a la fecundación. Los valores de heredabilidad fueron muy altos para la supervivencia de las larvas (0.49), mientras que fueron bajos y no significativos para la supervivencia de las larvas (≤0.07) y de medio a alto para los rasgos de crecimiento de las larvas y post-larvas (> 0.3). Los rasgos analizados en las post-larvas exhibieron interacciones significativas entre genotipo y ambiente en relación con la profundidad del cultivo en el mar. No se encontraron correlaciones genéticas significativas entre los rasgos medidos. Los resultados sugieren la existencia de un componente genético importante en la variación de la supervivencia post-larvaria y el crecimiento larvario y post-larval, así como una alta respuesta potencial a la selección genética directa, spa
dc.description.provenance Submitted by John Esteban Ramirez Rios (jramirezr@unimagdalena.edu.co) on 2018-10-05T14:32:12Z No. of bitstreams: 1 Barros et al 2018 (larvas y post).pdf: 458789 bytes, checksum: 79b63c0ec071ed2da4ff2236bc48ac1d (MD5) spa
dc.description.provenance Approved for entry into archive by John Esteban Ramirez Rios (jramirezr@unimagdalena.edu.co) on 2018-10-09T19:25:01Z (GMT) No. of bitstreams: 1 Barros et al 2018 (larvas y post).pdf: 458789 bytes, checksum: 79b63c0ec071ed2da4ff2236bc48ac1d (MD5) spa
dc.description.provenance Made available in DSpace on 2018-10-09T19:25:01Z (GMT). No. of bitstreams: 1 Barros et al 2018 (larvas y post).pdf: 458789 bytes, checksum: 79b63c0ec071ed2da4ff2236bc48ac1d (MD5) Previous issue date: 2018-10-10 spa
dc.format text spa
dc.identifier.other https://doi.org/10.1016/j.aquaculture.2018.06.047
dc.identifier.uri https://www.sciencedirect.com/science/article/pii/S0044848618302564
dc.language.iso en spa
dc.publisher Aquaculture : An International Journal spa
dc.publisher.department basica spa
dc.publisher.program biologia spa
dc.rights atribucionnocomercialsinderivar spa
dc.rights.cc Restringido spa
dc.subject Shell length spa
dc.subject Post-larvae recovery spa
dc.subject Genetic improvement spa
dc.subject Selective breeding spa
dc.subject Genetic gain spa
dc.subject Pectinid spa
dc.subject Almejas caribeñas spa
dc.subject Investigación genetica spa
dc.title Heritability, genetic correlations and genotype-environment interactions for growth and survival of larvae and post-larvae of the Caribbean scallop, Argopecten nucleus (Mollusca: Bivalvia) spa
dc.title.alternative Heredabilidad, correlaciones genéticas e interacciones genotipo-ambiente para el crecimiento y la supervivencia de larvas y post-larvas de la vieira caribeña, Argopecten nucleus (Mollusca: Bivalvia) spa
dc.type Article spa
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