Detection of invasive and cryptic species in marine mussels (Bivalvia, Mytilidae): A chromosomal perspective

García-Souto, Daniel; Sumner-Hempel, Auriel; Fervenza, Susana; Pérez-García, Concepción; Torreiro, A.; González-Romero, Rodrigo; Eirín‐López, José M.; Morán, Paloma; Pasantes, Juan J.

doi:10.1016/j.jnc.2017.07.005

Cited by 10 publications

(7 citation statements)

References 52 publications

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“…Several studies postulated the existence of cryptic species within the Brachidontes genus ( B. pharaonis/variabilis 3 and B. puniceus/exustus 24 , 68 ). These were usually argued by the distinct divergence (p-distance) at the nucleotide level (~ 7–20%) between mitochondrial sequences.…”

Section: Discussionmentioning

confidence: 99%

No evidence of DUI in the Mediterranean alien species Brachidontes pharaonis (P. Fisher, 1870) despite mitochondrial heteroplasmy

Lubośny

Śmietanka

Arculeo

et al. 2022

Sci Rep

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Two genetically different mitochondrial haplogroups of Brachidontes pharaonis (p-distance 6.8%) have been identified in the Mediterranean Sea. This hinted at a possible presence of doubly uniparental inheritance in this species. To ascertain this possibility, we sequenced two complete mitogenomes of Brachidontes pharaonis mussels and performed a qPCR analysis to measure the relative mitogenome copy numbers of both mtDNAs. Despite the presence of two very similar regions composed entirely of repetitive sequences in the two haplogroups, no recombination between mitogenomes was detected. In heteroplasmic individuals, both mitogenomes were present in the generative tissues of both sexes, which argues against the presence of doubly uniparental inheritance in this species.

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Section: Discussionmentioning

confidence: 99%

No evidence of DUI in the Mediterranean alien species Brachidontes pharaonis (P. Fisher, 1870) despite mitochondrial heteroplasmy

Lubośny

Śmietanka

Arculeo

et al. 2022

Sci Rep

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“…In contrast, the chromosomal location of the cluster varied from species to species: subcentromeric signals appeared in rough and flat periwinkles, intercalary ones in common and small periwinkles, and subterminal ones in mangrove and beaded periwinkles. The presence of these clusters at subterminal positions is quite unusual in invertebrate species and has only been described in some grasshoppers [ 39 ] and bivalves [ 25 , 28 , 40 , 41 , 42 , 43 ].…”

Section: Discussionmentioning

confidence: 99%

Karyotype Characterization of Nine Periwinkle Species (Gastropoda, Littorinidae)

García-Souto

Alonso-Rubido

Costa

et al. 2018

Genes

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Periwinkles of the family Littorinidae (Children, 1834) are common members of seashore littoral communities worldwide. Although the family is composed of more than 200 species belonging to 18 genera, chromosome numbers have been described in only eleven of them. A molecular cytogenetic analysis of nine periwinkle species, the rough periwinkles Littorina arcana, L. saxatilis, and L. compressa, the flat periwinkles L. obtusata and L. fabalis, the common periwinkle L. littorea, the mangrove periwinkle Littoraria angulifera, the beaded periwinkle Cenchritis muricatus, and the small periwinkle Melarhaphe neritoides was performed. All species showed diploid chromosome numbers of 2n = 34, and karyotypes were mostly composed of metacentric and submetacentric chromosome pairs. None of the periwinkle species showed chromosomal differences between male and female specimens. The chromosomal mapping of major and minor rDNA and H3 histone gene clusters by fluorescent in situ hybridization demonstrated that the patterns of distribution of these DNA sequences were conserved among closely related species and differed among less related ones. All signals occupied separated loci on different chromosome pairs without any evidence of co-localization in any of the species.

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“…Regarding 5S rDNA, the occurrence of a single cluster in Arctica islandica is shared by another 14 of the 24 heterodont bivalve species previously analysed [ 16 , 20 , 23 , 24 , 26 , 30 , 31 , 32 , 33 , 34 , 36 ] but its subcentromeric location in Arctica islandica was previously only described in two other Heterodonta species, the mactra clam Mactra stultorum [ 23 ] and the tellin shell Macomangulus tenuis [ 36 ]. In contrast, subcentromeric 5S rDNA clusters were common in marine mussels [ 53 ].…”

Section: Discussionmentioning

confidence: 99%

Cytogenetics in Arctica islandica (Bivalvia, Arctidae): the Longest Lived Non-Colonial Metazoan

García-Souto

Pasantes

2018

Genes

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Due to its extraordinary longevity and wide distribution, the ocean quahog Arctica islandica has become an important species model in both aging and environmental change research. Notwithstanding that, most genetic studies on ocean quahogs have been focused on fishery related, phylogeographic and phylogenetic aspects but nothing is known about their chromosomes. In this work, the chromosomes of the ocean quahog Arctica islandica were analysed by means of 4′,6-diamidino-2-phenylindole (DAPI)/propidium iodide (PI) staining and fluorescent in situ hybridization (FISH) with rDNA, histone gene and telomeric probes. Whilst both 5S rDNA and 45S rDNA were clustered at single subcentromeric locations on the long arms of chromosome pairs 2 and 12, respectively, histone gene clusters located on the short arms of chromosome pairs 7, 10 and 17. As happens with most bivalves, the location of the vertebrate type telomeric sequence clusters was restricted to chromosome ends. The knowledge of the karyotype can facilitate the anchoring of genomic sequences to specific chromosome pairs in this species.

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Detection of invasive and cryptic species in marine mussels (Bivalvia, Mytilidae): A chromosomal perspective

Cited by 10 publications

References 52 publications

No evidence of DUI in the Mediterranean alien species Brachidontes pharaonis (P. Fisher, 1870) despite mitochondrial heteroplasmy

No evidence of DUI in the Mediterranean alien species Brachidontes pharaonis (P. Fisher, 1870) despite mitochondrial heteroplasmy

Karyotype Characterization of Nine Periwinkle Species (Gastropoda, Littorinidae)

Cytogenetics in Arctica islandica (Bivalvia, Arctidae): the Longest Lived Non-Colonial Metazoan

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