Divergent lineages in a young species: the case of Datilillo (<i>Yucca valida</i>), a broadly distributed plant from the Baja California Peninsula
ABSTRACT Premise Globally, barriers triggered by climatic changes have caused habitat fragmentation and population allopatric divergence. One example of this are the oscillations of the Quaternary, which had an important role in the historical distribution of wildlife across North America. Notably, diverse plant species from the Baja California Peninsula, in western North America, exhibit strong genetic structure and highly concordant differentiated lineages across their ranges, as they were isolated during the Pleistocene glacial-interglacial cycles and thus accumulated genetic differences in their genomes. A representative plant genus of this Peninsula isYucca, withYucca validahaving the widest range. WhereasY. validais a dominant species, there is an extensive distribution discontinuity between 26° N and 27° N, where no individuals have been identified, suggesting restricted gene flow. Moreover, the historical distribution models indicate a substantial reduction in its range during the Last Interglacial, making it an interesting model for studying genetic divergence.Methods We examined the phylogeography ofY. validathroughout its range to identify the number of genetic lineages, quantify their genetic differentiation, reconstruct their demographic history and estimate the species’ age.Key results We assembled 4,411 SNPs from 147 plants, identifying three allopatric lineages. Our analyses supported that genetic drift is the driver of genetic differentiation among these lineages. We estimated an age under one million years for the common ancestor ofY. validaand its sister species.Conclusions Habitat fragmentation caused by climatic changes, low dispersal, and an extensive geographical range gap acted as cumulative mechanisms, leading to allopatric divergence inY. valida..
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Preprint| Erscheinungsjahr: |
2024 |
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| Erschienen: |
2024 |
| Enthalten in: |
bioRxiv.org - (2024) vom: 15. Apr. Zur Gesamtaufnahme - year:2024 |
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| Sprache: |
Englisch |
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| Beteiligte Personen: |
Aleman, Alberto [VerfasserIn] |
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| Links: |
Volltext [kostenfrei] |
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| doi: |
10.1101/2023.05.22.541794 |
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XBI039679071 |
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| 245 | 1 | 0 | |a Divergent lineages in a young species: the case of Datilillo (<i>Yucca valida</i>), a broadly distributed plant from the Baja California Peninsula |
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| 520 | |a ABSTRACT Premise Globally, barriers triggered by climatic changes have caused habitat fragmentation and population allopatric divergence. One example of this are the oscillations of the Quaternary, which had an important role in the historical distribution of wildlife across North America. Notably, diverse plant species from the Baja California Peninsula, in western North America, exhibit strong genetic structure and highly concordant differentiated lineages across their ranges, as they were isolated during the Pleistocene glacial-interglacial cycles and thus accumulated genetic differences in their genomes. A representative plant genus of this Peninsula isYucca, withYucca validahaving the widest range. WhereasY. validais a dominant species, there is an extensive distribution discontinuity between 26° N and 27° N, where no individuals have been identified, suggesting restricted gene flow. Moreover, the historical distribution models indicate a substantial reduction in its range during the Last Interglacial, making it an interesting model for studying genetic divergence.Methods We examined the phylogeography ofY. validathroughout its range to identify the number of genetic lineages, quantify their genetic differentiation, reconstruct their demographic history and estimate the species’ age.Key results We assembled 4,411 SNPs from 147 plants, identifying three allopatric lineages. Our analyses supported that genetic drift is the driver of genetic differentiation among these lineages. We estimated an age under one million years for the common ancestor ofY. validaand its sister species.Conclusions Habitat fragmentation caused by climatic changes, low dispersal, and an extensive geographical range gap acted as cumulative mechanisms, leading to allopatric divergence inY. valida. | ||
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| 700 | 1 | |a Arteaga, Maria Clara |e verfasserin |0 (orcid)0000-0002-6647-4511 |4 aut | |
| 700 | 1 | |a Gasca-Pineda, Jaime |e verfasserin |0 (orcid)0000-0002-3776-1351 |4 aut | |
| 700 | 1 | |a Bello-Bedoy, Rafael |e verfasserin |0 (orcid)0000-0002-5230-0940 |4 aut | |
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