Mitochondrial diversity and genetic structure in allopatric populations of the Pacific red snapper Lutjanus peru

We analyzed the genetic diversity and structure of three allopatric populations of the Pacific red snapper Lutjanus peru (Nichols and Murphy, 1922) by means of restriction fragment length polymorphisms of the entire mitochondrial control region (1350 bp). We found high levels of haplotype (h = 0.966...

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Main Authors: Rocha-Olivares, A, Sandoval-Castillo, JR
Format: Online
Language:eng
Published: Iniversidad Autónoma de Baja California 2003
Online Access:https://www.cienciasmarinas.com.mx/index.php/cmarinas/article/view/145
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spelling oai:cienciasmarinas.com.mx:article-1452019-04-26T19:32:09Z Mitochondrial diversity and genetic structure in allopatric populations of the Pacific red snapper Lutjanus peru Diversidad mitocondrial y estructura genética en poblaciones alopátricas del huachinango del Pacífico Lutjanus peru Rocha-Olivares, A Sandoval-Castillo, JR mitochondrial DNA population structure Pacific red snapper molecular genetic diversity AMOVA huachinango ADN mitocondrial estructura poblacional diversidad genética molecular AMOVA We analyzed the genetic diversity and structure of three allopatric populations of the Pacific red snapper Lutjanus peru (Nichols and Murphy, 1922) by means of restriction fragment length polymorphisms of the entire mitochondrial control region (1350 bp). We found high levels of haplotype (h = 0.966) and nucleotide (π = 3.23%) diversities among the 100 organisms analyzed from Baja California Sur, Sinaloa and Jalisco (Mexico). Most of the molecular variability was detected with only one of the five restriction enzymes used (MseI). Heterogeneity analysis of haplotype frequencies was not significant (χ2 = 125.1, P > 0.25); neither were Wright's fixation index (FST = 0.0062, P = 0.140) nor its molecular analogue (ΦST = 0.0194, P = 0.056). An analysis of molecular variance (AMOVA) confirmed the absence of differentiation between peninsular and continental populations, even though it produced a marginally significant ΦST (ΦST = 0.0116, P = 0.048). No phylogeographic pattern was detected in a Neighbor-Joining gene tree. We argue that high molecular diversity levels are consistent with a large population size and that the absence of an apparent genetic structure, in the extreme north of the species distribution, suggests the action of mechanisms favoring passive larval transport among allopatric populations; although active adult migration cannot be ruled out. Analizamos la diversidad genética y la estructura de tres poblaciones alopátricas del huachinango del Pacífico Lutjanus peru (Nichols y Murphy, 1922) mediante análisis de fragmentos de restricción de toda la región de control mitocondrial (1350 pb). Encontramos altos niveles de diversidad haplotípica (h = 0.966) y nucleotídica (π = 3.23%) en los 100 organismos analizados provenientes de las costas de Baja California Sur, Sinaloa y Jalisco (México). La mayor fracción de la variabilidad fue detectada con sólo una de las cinco enzimas de restricción utilizadas (MseI). El análisis de heterogeneidad de las frecuencias haplotípicas no fue significativo (χ2 = 125.1, P > 0.25); los valores de los índices de fijación de Wright (FST = 0.0062, P = 0.140) y su análogo molecular (ΦST = 0.0194, P = 0.056) tampoco lo fueron. Un análisis de variancia molecular (AMOVA) corroboró la ausencia de diferenciación entre poblaciones peninsulares y continentales, aunque arrojó un ΦST marginalmente significativo (ΦST = 0.0116, P = 0.048). No se detectó ningún patrón filogeográfico en un árbol génico reconstruido por Neighbor-Joining. Argumentamos que los altos niveles de diversidad genética molecular son consistentes con la existencia de un tamaño poblacional importante, mientras que la ausencia de estructura genética en el extremo norte de distribución de la especie sugiere la acción de mecanismos pasivos de transporte larvario entre poblaciones alopátricas, aunque la migración activa de organismos adultos no puede ser descartada del todo. Iniversidad Autónoma de Baja California 2003-03-06 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/145 10.7773/cm.v29i2.145 Ciencias Marinas; Vol. 29 No. 2 (2003); 197-209 Ciencias Marinas; Vol. 29 Núm. 2 (2003); 197-209 2395-9053 0185-3880 eng https://www.cienciasmarinas.com.mx/index.php/cmarinas/article/view/145/121
institution Ciencias Marinas
collection OJS
language eng
format Online
author Rocha-Olivares, A
Sandoval-Castillo, JR
spellingShingle Rocha-Olivares, A
Sandoval-Castillo, JR
Mitochondrial diversity and genetic structure in allopatric populations of the Pacific red snapper Lutjanus peru
author_facet Rocha-Olivares, A
Sandoval-Castillo, JR
author_sort Rocha-Olivares, A
title Mitochondrial diversity and genetic structure in allopatric populations of the Pacific red snapper Lutjanus peru
title_short Mitochondrial diversity and genetic structure in allopatric populations of the Pacific red snapper Lutjanus peru
title_full Mitochondrial diversity and genetic structure in allopatric populations of the Pacific red snapper Lutjanus peru
title_fullStr Mitochondrial diversity and genetic structure in allopatric populations of the Pacific red snapper Lutjanus peru
title_full_unstemmed Mitochondrial diversity and genetic structure in allopatric populations of the Pacific red snapper Lutjanus peru
title_sort mitochondrial diversity and genetic structure in allopatric populations of the pacific red snapper lutjanus peru
description We analyzed the genetic diversity and structure of three allopatric populations of the Pacific red snapper Lutjanus peru (Nichols and Murphy, 1922) by means of restriction fragment length polymorphisms of the entire mitochondrial control region (1350 bp). We found high levels of haplotype (h = 0.966) and nucleotide (π = 3.23%) diversities among the 100 organisms analyzed from Baja California Sur, Sinaloa and Jalisco (Mexico). Most of the molecular variability was detected with only one of the five restriction enzymes used (MseI). Heterogeneity analysis of haplotype frequencies was not significant (χ2 = 125.1, P > 0.25); neither were Wright's fixation index (FST = 0.0062, P = 0.140) nor its molecular analogue (ΦST = 0.0194, P = 0.056). An analysis of molecular variance (AMOVA) confirmed the absence of differentiation between peninsular and continental populations, even though it produced a marginally significant ΦST (ΦST = 0.0116, P = 0.048). No phylogeographic pattern was detected in a Neighbor-Joining gene tree. We argue that high molecular diversity levels are consistent with a large population size and that the absence of an apparent genetic structure, in the extreme north of the species distribution, suggests the action of mechanisms favoring passive larval transport among allopatric populations; although active adult migration cannot be ruled out.
publisher Iniversidad Autónoma de Baja California
publishDate 2003
url https://www.cienciasmarinas.com.mx/index.php/cmarinas/article/view/145
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