Dataset Information

The whole mitochondrial genome of the mangrove crab, Metopograpsus frontalis (Miers, 1880) (Decapoda, Grapsidae) and its phylogenetic relationship.

ABSTRACT: In this study, we sequenced and analyzed the whole mitochondrial genome of Metopograpsus frontalis Miers, 1880 (Decapoda, Grapsidae). The circular genome is 15,587?bp in length, consisting of 13 protein-coding genes, 22 transfer RNA genes, 2 ribosomal RNA genes, as well as a control region. Both atp8/atp6 and nad4L/nad4 share 7 nucleotides in their adjacent overlapping region, which is identical to those observed in other Grapsidae crabs. The genome composition and gene order follow a classic crab-type arrangement regulation. The phylogenetic analysis suggested that Grapsidae crabs formed a solid monophyletic group. The newly described mitochondrial genome may provide genetic marker for studies on phylogeny of the grapsid crabs.

SUBMITTER: Guan M

PROVIDER: S-EPMC7800978 | biostudies-literature | 2018 Mar

REPOSITORIES: biostudies-literature

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Publications

The whole mitochondrial genome of the mangrove crab, Metopograpsus frontalis (Miers, 1880) (Decapoda, Grapsidae) and its phylogenetic relationship.

Guan Mengyun M Liu Xinming X Lin Fan F Xie Zhuofang Z Fazhan Hanafiah H Ikhwanuddin Mhd M Tan Huaqiang H Ma Hongyu H

Mitochondrial DNA. Part B, Resources 20180314 1

In this study, we sequenced and analyzed the whole mitochondrial genome of Metopograpsus frontalis Miers, 1880 (Decapoda, Grapsidae). The circular genome is 15,587 bp in length, consisting of 13 protein-coding genes, 22 transfer RNA genes, 2 ribosomal RNA genes, as well as a control region. Both atp8/atp6 and nad4L/nad4 share 7 nucleotides in their adjacent overlapping region, which is identical to those observed in other Grapsidae crabs. The genome composition ...[more]

PMID: 33490509

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Project description:BACKGROUND:Studies on marine community dynamics and population structures are limited by the lack of exhaustive knowledge on the larval dispersal component of connectivity. Genetic data represents a powerful tool in understanding such processes in the marine realm. When dealing with dispersion and connectivity in marine ecosystems, many evidences show patterns of genetic structure that cannot be explained by any clear geographic trend and may show temporal instability. This scenario is usually referred to as chaotic genetic patchiness, whose driving mechanisms are recognized to be selection, temporal shifts in local population dynamics, sweepstakes reproductive success and collective dispersal. In this study we focused on the marbled crab Pachygrapsus marmoratus that inhabits the rocky shores of the Mediterranean Sea, Black Sea and East Atlantic Ocean, and disperses through planktonic larvae for about 1 month. P. marmoratus exhibits unexpectedly low connectivity levels at local scale, although well-defined phylogeographic patterns across the species' distribution range were described. This has been explained as an effect of subtle geographic barriers or due to sweepstake reproductive success. In order to verify a chaotic genetic patchiness scenario, and to explore mechanisms underlying it, we planned our investigation within the Ligurian Sea, an isolated basin of the western Mediterranean Sea, and we genotyped 321 individuals at 11 microsatellite loci. RESULTS:We recorded genetic heterogeneity among our Ligurian Sea samples with the occurrence of genetic clusters not matching the original populations and a slight inter-population divergence, with the geographically most distant populations being the genetically most similar ones. Moreover, individuals from each site were assigned to all the genetic clusters. We also recorded evidences of self-recruitment and a higher than expected within-site kinship. CONCLUSIONS:Overall, our results suggest that the chaotic genetic patchiness we found in P. marmoratus Ligurian Sea populations is the result of a combination of differences in reproductive success, en masse larval dispersion and local larval retention. This study defines P. marmoratus as an example of marine spawner whose genetic pool is not homogenous at population level, but rather split in a chaotic mosaic of slightly differentiated genetic patches derived from complex and dynamic ecological processes.

Dataset Information

The whole mitochondrial genome of the mangrove crab, Metopograpsus frontalis (Miers, 1880) (Decapoda, Grapsidae) and its phylogenetic relationship.

Publications

The whole mitochondrial genome of the mangrove crab, <i>Metopograpsus frontalis</i> (Miers, 1880) (Decapoda, Grapsidae) and its phylogenetic relationship.

Similar Datasets

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