Introgressive hybridization in the west Pacific pen shells (genus <i>Atrina</i>): Restricted interspecies gene flow within the genome

Sekino, Masashi; Hashimoto, Kazumasa; Nakamichi, Reiichiro; Yamamoto, Masayuki; Fujinami, Yuichiro; Sasaki, Takenori

doi:10.1111/mec.16908

Molecular Ecology

2023

DOI: 10.1111/mec.16908

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Introgressive hybridization in the west Pacific pen shells (genus Atrina): Restricted interspecies gene flow within the genome

Masashi Sekino

Kazumasa Hashimoto

Reiichiro Nakamichi

et al.

Abstract: Hybridization provides a golden chance for us to delve into the genomic architecture of reproductive isolation, the data from which in turn enhances our understanding of speciation processes. Hence, hybrid zones, where divergent lineages come into reproductive contact producing multiple generations of hybrids through introgressive

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2024

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Cited by 3 publications

References 128 publications

(170 reference statements)

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Multiplex panels of SNP markers based on single-base primer extension in the west Pacific pen shell Atrina lischkeana (Clessin, 1891)

Sekino,

Nakamichi,

Ojima

et al. 2024

Mol Biol Rep

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Multiplex panels of SNP markers based on single-base primer extension in the west Pacific pen shell Atrina lischkeana (Clessin, 1891)

Sekino,

Nakamichi,

Ojima

et al. 2024

Mol Biol Rep

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Paleoclimate Fluctuations Facilitate the Biogeographical History of Endemic Species of Freshwater Crabs in China via Cycles of Introgressive Hybridisation and Habitat Isolation

Shi,

Wang,

Song

et al. 2024

Journal of Biogeography

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AimThe impact of Pleistocene climate fluctuations on the biogeographical history of aquatic species has been a topic of enduring debate. This issue poses particular challenges for parapatric closely related species, especially those situated in transition zones where species assemblages occur between distinct zoogeographic boundaries.LocationEastern China.TaxonFive closely related Sinopotamon species and subspecies, S. shensiense, S. honanense, S. y. yangtsekiense, S. y. shanxianense, and S. y. tongbaiense.MethodsThese parapatric Sinopotamon species and subspecies, distributed along the boundary between the Palaearctic and Oriental realms in eastern China, offer an ideal model for addressing these challenges. We explored the biogeographic history of these species by conducting a comparative phylogeographic analysis using nine microsatellite loci and two mitochondrial DNA sequences, combined with morphological variation and fine‐tuned ecological niche modelling.ResultsOur phylogeographic analyses consistently revealed two well‐supported clades: clade A, for S. y. yangtsekiense, and clade B, which includes other species showing polyphyletic patterning and significant gene introgression. The Nanyang Basin and surrounding mountains regions (NBSM) was identified as a critical shared refuge and hybrid zone, facilitating interspecific introgression through at least two putative hybridisation events. During the Late Pleistocene glacial cycles, introgressive hybridisation of these species occurred in the NBSM, followed by rapid expansion and colonisation of heterogenous habitats during interglacial cycles, with dispersal corridors largely aligning with the local river system. In particular, the diffusion corridor of S. honanense significantly disrupted the continuous distribution of S. y. shanxianense and S. y. tongbaiense, indicating that S. honanense has replaced S. y. shanxianense and S. y. tongbaiense in the NYSM and caused a disruption in its distribution.Main ConclusionsThe biogeographic histories of the species in clade B are consistent with a mixing–isolation–mixing model, which suggests that populations experienced repeated introgressive hybridisation during glacial periods and regional habitat isolation during interglacial periods. Our findings represent a classic case of fine tracking biogeographical scenarios in parapatric species and provide unprecedented insights into the evolutionary radiation of the freshwater fauna that occupies zoogeographic boundaries.

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5. Introgressive hybridization and genetic barriers to interspecies gene flow in the west Pacific pen shells (genus <i>Atrina</i>)

SEKINO

2024

NSUGAF

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Introgressive hybridization in the west Pacific pen shells (genus Atrina): Restricted interspecies gene flow within the genome

Cited by 3 publications

References 128 publications

Multiplex panels of SNP markers based on single-base primer extension in the west Pacific pen shell Atrina lischkeana (Clessin, 1891)

Multiplex panels of SNP markers based on single-base primer extension in the west Pacific pen shell Atrina lischkeana (Clessin, 1891)

Paleoclimate Fluctuations Facilitate the Biogeographical History of Endemic Species of Freshwater Crabs in China via Cycles of Introgressive Hybridisation and Habitat Isolation

5. Introgressive hybridization and genetic barriers to interspecies gene flow in the west Pacific pen shells (genus <i>Atrina</i>)

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