Genetic structure of the Peruvian scallop Argopecten purpuratus inferred from mitochondrial and nuclear DNA variation

Abstract

The population genetic structure of the Peruvian scallop Argopecten purpuratus from three different wild populations along the Peruvian coast was analyzed using nine microsatellite loci and a partial region (530 bp) of the mitochondrial 16S rRNA gene. A total of 19 polymorphic sites in the 16S rRNA gene defined 18 unique haplotypes. High genetic diversity was presented in all populations. Statistical analysis of mitochondrial DNA revealed no significant genetic structure (ΦST=0.00511, P=0.32149) among the three localities. However, microsatellite analysis showed low (2.86%) but highly significant (P=0.0001) genetic differentiation among populations, most of the variation was found in Independencia Bay population, which is located in the Peruvian National Reserve of Paracas. Neutrality tests based on mitochondrial haplotypes were performed to assess signatures of recent historical demographic events. Overall results from Tajima's D and Fu's FS tests indicated significant deviations from neutrality. To our knowledge, this study constitutes the first investigation based on mitochondrial and microsatellite markers on the genetic structure of A. purpuratus

Microsatellite variation of mussels (Mytilus galloprovincialis) in central and eastern Mediterranean: genetic panmixia in the Aegean and the Ionian Seas

“…High levels of genetic diversity are common within marine bivalves (Marin et al, 2013 and references therein). On the other hand, several studies have demonstrated a reduction in genetic variability within cultured aquatic populations over a relatively short period of time as a result of inbreeding (e.g.…”

Substantial gene flow caused by long-term translocation between wild populations of the Peruvian scallop (Argopecten purpuratus) is supported by RAD-Seq analyses

“…In any case, we would expect to detect population structure at least between Bahia Independencia and the rest of sites. Previous genetic distinction for this population was observed by Marín et al (2013), who suggested that the geographic and oceanographic characteristics of this bay strongly limited natural gene flow with other populations.…”

“…Genetic tools offer an opportunity for reliable traceability of seafood (Bernatchez et al, 2017) given detailed information on the genetic structure and distribution of the source populations is available. Two previous studies used mitochondrial markers to assess the genetic diversity and population structure in the Peruvian scallop (Marín et al, 2013;Acosta-Jofré et al, 2020). These markers were useful in determining genetic differences between populations, but they lack the power to detect small, but significant, genetic differences in nearby and large populations (Waples, 1998).…”

“…An early study investigated the level of genetic structure for three Peruvian scallop populations in Peru (Sechura, Samanco, and Bahia Independencia). They found a significant, albeit weak, population differentiation using nine microsatellite and mitochondrial markers (Marín, Fujimoto, & Arai, 2013). The authors suggested that, despite intense translocations, at least one population retained part of its genetic signature (Bahia Independencia) due to asymmetric translocations and to the effect of geographic distance for realized larval dispersion.…”

High-resolution linkage and quantitative trait locus mapping using an interspecific cross between Argopecten irradians irradians (♀) and A. purpuratus (♂)

“…The bay scallop, Argopecten irradians irradians, and the Peruvian scallop, A. purpuratus, are economically important species naturally distributed along the Atlantic coasts from Nova Scotia to the Gulf of Mexico and Pacific coasts from Peru to Chile, respectively (Wolff and Mendo 2000). Geographic isolation and climatic variability promoted their divergence and allopatric speciation (Brand 2006;Marín et al 2013). Despite that, Argopecten scallops have distinct size, life span, temperature and hypoxia tolerance, these two species share similar life history and karyotypes Junxia Mao and Qifan Zeng contributed equally to this work.…”