What maintains the central North Pacific genetic discontinuity in Pacific herring?
Pacific herring show an abrupt genetic discontinuity in the central North Pacific that represents secondary contact between refuge populations previously isolated during Pleistocene glaciations. Paradoxically, high levels of gene flow produce genetic homogeneity among ocean-type populations within e...
| Main Authors: | , , , , , |
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| Format: | Article |
| Language: | English |
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Public Library of Science (PLoS)
2012-01-01
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| Series: | PLoS ONE |
| Online Access: | http://europepmc.org/articles/PMC3532504?pdf=render |
| _version_ | 1818194319982460928 |
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| author | Ming Liu Longshan Lin Tianxiang Gao Takashi Yanagimoto Yasunori Sakurai W Stewart Grant |
| author_facet | Ming Liu Longshan Lin Tianxiang Gao Takashi Yanagimoto Yasunori Sakurai W Stewart Grant |
| author_sort | Ming Liu |
| collection | DOAJ |
| description | Pacific herring show an abrupt genetic discontinuity in the central North Pacific that represents secondary contact between refuge populations previously isolated during Pleistocene glaciations. Paradoxically, high levels of gene flow produce genetic homogeneity among ocean-type populations within each group. Here, we surveyed variability in mtDNA control-region sequences (463 bp) and nine microsatellite loci in Pacific herring from sites across the North Pacific to further explore the nature of the genetic discontinuity around the Alaska Peninsula. Consistent with previous studies, little divergence (Φ(ST) = 0.011) was detected between ocean-type populations of Pacific herring in the North West Pacific, except for a population in the Yellow Sea (Φ(ST) = 0.065). A moderate reduction in genetic diversity for both mtDNA and microsatellites in the Yellow Sea likely reflects founder effects during the last colonization of this sea. Reciprocal monophyly between divergent mtDNA lineages (Φ(ST) = 0.391) across the Alaska Peninsula defines the discontinuity across the North Pacific. However, microsatellites did not show a strong break, as eastern Bering Sea (EBS) herring were more closely related to NE Pacific than to NW Pacific herring. This discordance between mtDNA and microsatellites may be due to microsatellite allelic convergence or to sex-biased dispersal across the secondary contact zone. The sharp discontinuity between Pacific herring populations may be maintained by high-density blocking, competitive exclusion or hybrid inferiority. |
| first_indexed | 2024-12-12T01:00:25Z |
| format | Article |
| id | doaj.art-a4a75c715c764c6fb4fe3199982aa5df |
| institution | Directory Open Access Journal |
| issn | 1932-6203 |
| language | English |
| last_indexed | 2024-12-12T01:00:25Z |
| publishDate | 2012-01-01 |
| publisher | Public Library of Science (PLoS) |
| record_format | Article |
| series | PLoS ONE |
| spelling | doaj.art-a4a75c715c764c6fb4fe3199982aa5df2022-12-22T00:43:44ZengPublic Library of Science (PLoS)PLoS ONE1932-62032012-01-01712e5034010.1371/journal.pone.0050340What maintains the central North Pacific genetic discontinuity in Pacific herring?Ming LiuLongshan LinTianxiang GaoTakashi YanagimotoYasunori SakuraiW Stewart GrantPacific herring show an abrupt genetic discontinuity in the central North Pacific that represents secondary contact between refuge populations previously isolated during Pleistocene glaciations. Paradoxically, high levels of gene flow produce genetic homogeneity among ocean-type populations within each group. Here, we surveyed variability in mtDNA control-region sequences (463 bp) and nine microsatellite loci in Pacific herring from sites across the North Pacific to further explore the nature of the genetic discontinuity around the Alaska Peninsula. Consistent with previous studies, little divergence (Φ(ST) = 0.011) was detected between ocean-type populations of Pacific herring in the North West Pacific, except for a population in the Yellow Sea (Φ(ST) = 0.065). A moderate reduction in genetic diversity for both mtDNA and microsatellites in the Yellow Sea likely reflects founder effects during the last colonization of this sea. Reciprocal monophyly between divergent mtDNA lineages (Φ(ST) = 0.391) across the Alaska Peninsula defines the discontinuity across the North Pacific. However, microsatellites did not show a strong break, as eastern Bering Sea (EBS) herring were more closely related to NE Pacific than to NW Pacific herring. This discordance between mtDNA and microsatellites may be due to microsatellite allelic convergence or to sex-biased dispersal across the secondary contact zone. The sharp discontinuity between Pacific herring populations may be maintained by high-density blocking, competitive exclusion or hybrid inferiority.http://europepmc.org/articles/PMC3532504?pdf=render |
| spellingShingle | Ming Liu Longshan Lin Tianxiang Gao Takashi Yanagimoto Yasunori Sakurai W Stewart Grant What maintains the central North Pacific genetic discontinuity in Pacific herring? PLoS ONE |
| title | What maintains the central North Pacific genetic discontinuity in Pacific herring? |
| title_full | What maintains the central North Pacific genetic discontinuity in Pacific herring? |
| title_fullStr | What maintains the central North Pacific genetic discontinuity in Pacific herring? |
| title_full_unstemmed | What maintains the central North Pacific genetic discontinuity in Pacific herring? |
| title_short | What maintains the central North Pacific genetic discontinuity in Pacific herring? |
| title_sort | what maintains the central north pacific genetic discontinuity in pacific herring |
| url | http://europepmc.org/articles/PMC3532504?pdf=render |
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