Substantial genetic mixing among sexual and androgenetic lineages within the clam genus Corbicula
“Occasional” sexuality occurs when a species combines clonal reproduction and genetic mixing. This strategy is predicted to combine the advantages of both asexuality and sexuality, but its actual consequences on the genetic diversity and species longevity are poorly understood. Androgenesis, a repro...
| Main Authors: | , , , , , , , , , , , |
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| Format: | Article |
| Language: | English |
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Peer Community In
2022-11-01
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| Series: | Peer Community Journal |
| Online Access: | https://peercommunityjournal.org/articles/10.24072/pcjournal.180/ |
| _version_ | 1797651167909511168 |
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| author | Vastrade, Martin Etoundi, Emilie Bournonville, Thibaut Colinet, Mathilde Debortoli, Nicolas Hedtke, Shannon M. Nicolas, Emilien Pigneur, Lise-Marie Virgo, Julie Flot, Jean-François Marescaux, Jonathan Van Doninck, Karine |
| author_facet | Vastrade, Martin Etoundi, Emilie Bournonville, Thibaut Colinet, Mathilde Debortoli, Nicolas Hedtke, Shannon M. Nicolas, Emilien Pigneur, Lise-Marie Virgo, Julie Flot, Jean-François Marescaux, Jonathan Van Doninck, Karine |
| author_sort | Vastrade, Martin |
| collection | DOAJ |
| description | “Occasional” sexuality occurs when a species combines clonal reproduction and genetic mixing. This strategy is predicted to combine the advantages of both asexuality and sexuality, but its actual consequences on the genetic diversity and species longevity are poorly understood. Androgenesis, a reproductive mode in which the offspring inherits its entire nuclear genome from the father, is often reported as a strictly clonal reproductive mode. Androgenesis is the predominant reproductive mode within the hermaphroditic, invasive lineages of the mollusk genus Corbicula. Their ability to reproduce clonally through androgenesis has been determinant in their invasive success, having colonized during the 20th century American and European freshwater systems, where they became notorious invaders with a widespread, global distribution. However, in androgenetic Corbicula clams, occasional genetic mixing between distinct lineages has also been observed when the sperm of one lineage fertilizes the oocyte of another one. Because of these occasional introgressions, the genetic relationships between Corbicula species remained unclear, and the biogeographic origins of the invasive androgenetic lineages have been challenging to identify. To address these issues, we analyzed the patterns of allele sharing for several nuclear and mitochondrial molecular markers among Corbicula individuals collected across both the native and invasive range. Our results show the occurrence of an allelic pool encompassing all Corbicula freshwater species worldwide, including sexual and androgenetic ones, which highlights the substantial genetic mixing within this genus. However, the differences in allele sharing patterns between invasive lineages, and the low diversity within each lineage, suggest recent, distinct biogeographic origins of invasive Corbicula androgenetic lineages. Finally, the polyploidy, high heterozygosity, and hybrid phenotypes and genotypes found in our study probably originated from hybridization events following egg parasitism between distinct Corbicula lineages. This extensive cross-lineage mixing found in Corbicula may generate nuclear diversity in an otherwise asexually reproducing species.
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| first_indexed | 2024-03-11T16:11:02Z |
| format | Article |
| id | doaj.art-41c6dd318a694de3904516216c093c10 |
| institution | Directory Open Access Journal |
| issn | 2804-3871 |
| language | English |
| last_indexed | 2024-03-11T16:11:02Z |
| publishDate | 2022-11-01 |
| publisher | Peer Community In |
| record_format | Article |
| series | Peer Community Journal |
| spelling | doaj.art-41c6dd318a694de3904516216c093c102023-10-24T14:38:35ZengPeer Community InPeer Community Journal2804-38712022-11-01210.24072/pcjournal.18010.24072/pcjournal.180Substantial genetic mixing among sexual and androgenetic lineages within the clam genus CorbiculaVastrade, Martin0https://orcid.org/0000-0001-9648-7906Etoundi, Emilie1Bournonville, Thibaut2Colinet, Mathilde3https://orcid.org/0000-0001-5514-4878Debortoli, Nicolas4https://orcid.org/0000-0002-1145-9146Hedtke, Shannon M.5https://orcid.org/0000-0002-7499-7662Nicolas, Emilien6https://orcid.org/0000-0002-7583-4902Pigneur, Lise-Marie7Virgo, Julie8Flot, Jean-François9https://orcid.org/0000-0003-4091-7916Marescaux, Jonathan10https://orcid.org/0000-0003-4804-4400Van Doninck, Karine11https://orcid.org/0000-0002-4790-8951Laboratory of Evolutionary Genetics and Ecology; Research Unit in Environmental and Evolutionary Biology; Institute of Life, Earth and Environment (ILEE); University of Namur, 5000 Namur, BelgiumLaboratory of Evolutionary Genetics and Ecology; Research Unit in Environmental and Evolutionary Biology; Institute of Life, Earth and Environment (ILEE); University of Namur, 5000 Namur, Belgiume-biom SA, 5/7 Rue Godefroid, 5000 Namur, BelgiumLaboratory of Evolutionary Genetics and Ecology; Research Unit in Environmental and Evolutionary Biology; Institute of Life, Earth and Environment (ILEE); University of Namur, 5000 Namur, BelgiumLaboratory of Evolutionary Genetics and Ecology; Research Unit in Environmental and Evolutionary Biology; Institute of Life, Earth and Environment (ILEE); University of Namur, 5000 Namur, Belgium; e-biom SA, 5/7 Rue Godefroid, 5000 Namur, BelgiumDepartment of Environment and Genetics, School of Agriculture, Biomedicine and Environment, La Trobe University, Bundoora, Victoria, 3086, AustraliaUniversité libre de Bruxelles (ULB), Molecular Biology and Evolution, C.P. 160/16, Avenue F.D. Roosevelt 50, 1050 Brussels, BelgiumUniversité de Liège, Conservation Genetics Laboratory, Chemin de la vallée 4, 4000 Liège, BelgiumLaboratory of Evolutionary Genetics and Ecology; Research Unit in Environmental and Evolutionary Biology; Institute of Life, Earth and Environment (ILEE); University of Namur, 5000 Namur, BelgiumUniversité libre de Bruxelles (ULB), Evolutionary Biology and Ecology, C.P. 160/12, Avenue F.D. Roosevelt 50, 1050 Brussels, Belgium; Interuniversity Institute of Bioinformatics in Brussels – (IB)2, Brussels, BelgiumLaboratory of Evolutionary Genetics and Ecology; Research Unit in Environmental and Evolutionary Biology; Institute of Life, Earth and Environment (ILEE); University of Namur, 5000 Namur, Belgium; e-biom SA, 5/7 Rue Godefroid, 5000 Namur, BelgiumLaboratory of Evolutionary Genetics and Ecology; Research Unit in Environmental and Evolutionary Biology; Institute of Life, Earth and Environment (ILEE); University of Namur, 5000 Namur, Belgium; Université libre de Bruxelles (ULB), Molecular Biology and Evolution, C.P. 160/16, Avenue F.D. Roosevelt 50, 1050 Brussels, Belgium“Occasional” sexuality occurs when a species combines clonal reproduction and genetic mixing. This strategy is predicted to combine the advantages of both asexuality and sexuality, but its actual consequences on the genetic diversity and species longevity are poorly understood. Androgenesis, a reproductive mode in which the offspring inherits its entire nuclear genome from the father, is often reported as a strictly clonal reproductive mode. Androgenesis is the predominant reproductive mode within the hermaphroditic, invasive lineages of the mollusk genus Corbicula. Their ability to reproduce clonally through androgenesis has been determinant in their invasive success, having colonized during the 20th century American and European freshwater systems, where they became notorious invaders with a widespread, global distribution. However, in androgenetic Corbicula clams, occasional genetic mixing between distinct lineages has also been observed when the sperm of one lineage fertilizes the oocyte of another one. Because of these occasional introgressions, the genetic relationships between Corbicula species remained unclear, and the biogeographic origins of the invasive androgenetic lineages have been challenging to identify. To address these issues, we analyzed the patterns of allele sharing for several nuclear and mitochondrial molecular markers among Corbicula individuals collected across both the native and invasive range. Our results show the occurrence of an allelic pool encompassing all Corbicula freshwater species worldwide, including sexual and androgenetic ones, which highlights the substantial genetic mixing within this genus. However, the differences in allele sharing patterns between invasive lineages, and the low diversity within each lineage, suggest recent, distinct biogeographic origins of invasive Corbicula androgenetic lineages. Finally, the polyploidy, high heterozygosity, and hybrid phenotypes and genotypes found in our study probably originated from hybridization events following egg parasitism between distinct Corbicula lineages. This extensive cross-lineage mixing found in Corbicula may generate nuclear diversity in an otherwise asexually reproducing species. https://peercommunityjournal.org/articles/10.24072/pcjournal.180/ |
| spellingShingle | Vastrade, Martin Etoundi, Emilie Bournonville, Thibaut Colinet, Mathilde Debortoli, Nicolas Hedtke, Shannon M. Nicolas, Emilien Pigneur, Lise-Marie Virgo, Julie Flot, Jean-François Marescaux, Jonathan Van Doninck, Karine Substantial genetic mixing among sexual and androgenetic lineages within the clam genus Corbicula Peer Community Journal |
| title | Substantial genetic mixing among sexual and androgenetic lineages within the clam genus Corbicula |
| title_full | Substantial genetic mixing among sexual and androgenetic lineages within the clam genus Corbicula |
| title_fullStr | Substantial genetic mixing among sexual and androgenetic lineages within the clam genus Corbicula |
| title_full_unstemmed | Substantial genetic mixing among sexual and androgenetic lineages within the clam genus Corbicula |
| title_short | Substantial genetic mixing among sexual and androgenetic lineages within the clam genus Corbicula |
| title_sort | substantial genetic mixing among sexual and androgenetic lineages within the clam genus corbicula |
| url | https://peercommunityjournal.org/articles/10.24072/pcjournal.180/ |
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