Oyster culture in San Quintin Bay, B.C., Mexico: Genetic aspects

In order to assess the genetic resource of San Quintín Bay oyster culture, an electrophoretic analysis on seven genetic loci from 50 organism sample of Crassostrea gigas was performed. The values of genetic variability obtained were compared with those found previously by other authors in three Japa...

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Main Authors: De la Rosa-Vélez, J, Gutiérrez-Wing, MT, Radilla-Camacho, R
Format: Online
Language:eng
Published: Iniversidad Autónoma de Baja California 2021
Online Access:https://www.cienciasmarinas.com.mx/index.php/cmarinas/article/view/812
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spelling oai:cienciasmarinas.com.mx:article-8122013-08-19T03:29:29Z Oyster culture in San Quintin Bay, B.C., Mexico: Genetic aspects El ostricultivo de Bahía de San Quintín, B.C., México: Aspectos genéticos De la Rosa-Vélez, J Gutiérrez-Wing, MT Radilla-Camacho, R In order to assess the genetic resource of San Quintín Bay oyster culture, an electrophoretic analysis on seven genetic loci from 50 organism sample of Crassostrea gigas was performed. The values of genetic variability obtained were compared with those found previously by other authors in three Japanese populations. Besides, genetic similarities and distance were estimated between the San Quintín population and Japanese population, obtaining evidence on the probable origin of the San Quintin population in the Japanese population of Miyagi. Maintenance of genetic variability was evident in the Mexican population, however, heterozygosity deficiency was detected in four out of seven loci assayed. The most probable causes of this outcome are: natural selection against heterozygote genotypes in the new environment experienced by the species; inbreeding produced by means of the mating system employed and/or Wahlund effect provoked by the indiscriminate introduction of spat from different Ameritan Coast hatcheries. Con el fin de evaluar el estado del recurso genético del cultivo ostrícola de la Bahía de San Quintín, se efectuó un análisis electroforético de siete loci génicos en una muestra de SO organismos de la especie Crassostrea gigas. Los resultados obtenidos respecto a la variabilidad genética fueron comparados con tres poblaciones naturales del Japón, cuyos niveles de variación genética ya habían sido reportados en la literatura. Además, se estimaron las similitudes y distancias genéticas de la población de San Quintín analizada, con respecto a las poblaciones japonesas, deduciéndosela posibilidad de que el origen de la población que se utilizó para iniciar el cultivo en la Bahía de San Quintín, haya sido la población japonesa de Miyagi. Se puede apreciar el mantenimiento de los niveles de variación genética en la población mexicana, sin embargo, cuatro de siete loci analizados presentaron deficiencia de heterocigotos. Las posibles causas de este fenómeno en este caso son: selección natural en contra de los genotipos heterocigotos en el nuevo ambiente experimentado por la especie, endogamia producida por el sistema de cruzamiento exhibido y/o el efecto de Wahlund provocado por la introducción indiscriminada de semilla procedente de diferentes laboratorios productores en la costa oeste de Norteamérica. Iniversidad Autónoma de Baja California 2021-02-18 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Peer-reviewed Article Artículo Arbitrado application/pdf https://www.cienciasmarinas.com.mx/index.php/cmarinas/article/view/812 10.7773/cm.v17i3.812 Ciencias Marinas; Vol. 17 No. 3 (1991); 133-145 Ciencias Marinas; Vol. 17 Núm. 3 (1991); 133-145 2395-9053 0185-3880 eng https://www.cienciasmarinas.com.mx/index.php/cmarinas/article/view/812/420420531 Copyright (c) 2021 Ciencias Marinas
institution Ciencias Marinas
collection OJS
language eng
format Online
author De la Rosa-Vélez, J
Gutiérrez-Wing, MT
Radilla-Camacho, R
spellingShingle De la Rosa-Vélez, J
Gutiérrez-Wing, MT
Radilla-Camacho, R
Oyster culture in San Quintin Bay, B.C., Mexico: Genetic aspects
author_facet De la Rosa-Vélez, J
Gutiérrez-Wing, MT
Radilla-Camacho, R
author_sort De la Rosa-Vélez, J
title Oyster culture in San Quintin Bay, B.C., Mexico: Genetic aspects
title_short Oyster culture in San Quintin Bay, B.C., Mexico: Genetic aspects
title_full Oyster culture in San Quintin Bay, B.C., Mexico: Genetic aspects
title_fullStr Oyster culture in San Quintin Bay, B.C., Mexico: Genetic aspects
title_full_unstemmed Oyster culture in San Quintin Bay, B.C., Mexico: Genetic aspects
title_sort oyster culture in san quintin bay, b.c., mexico: genetic aspects
description In order to assess the genetic resource of San Quintín Bay oyster culture, an electrophoretic analysis on seven genetic loci from 50 organism sample of Crassostrea gigas was performed. The values of genetic variability obtained were compared with those found previously by other authors in three Japanese populations. Besides, genetic similarities and distance were estimated between the San Quintín population and Japanese population, obtaining evidence on the probable origin of the San Quintin population in the Japanese population of Miyagi. Maintenance of genetic variability was evident in the Mexican population, however, heterozygosity deficiency was detected in four out of seven loci assayed. The most probable causes of this outcome are: natural selection against heterozygote genotypes in the new environment experienced by the species; inbreeding produced by means of the mating system employed and/or Wahlund effect provoked by the indiscriminate introduction of spat from different Ameritan Coast hatcheries.
publisher Iniversidad Autónoma de Baja California
publishDate 2021
url https://www.cienciasmarinas.com.mx/index.php/cmarinas/article/view/812
_version_ 1715724014545010688