Hybridization boosts dispersal of two contrasted ecotypes in a grass species
Genetic exchanges between closely related groups of organisms with different adaptations have well-documented beneficial and detrimental consequences. In plants, pollen-mediated exchanges affect the sorting of alleles across physical landscapes and influence rates of hybridization. How these dynamics affect the emergence and spread of novel phenotypes remains only partially understood. Here, we use phylogenomics and population genomics to retrace the origin and spread of two geographically overlapping ecotypes of the African grass Alloteropsis angusta. In addition to an ecotype inhabiting wetlands, we report the existence of a previously undescribed ecotype inhabiting Miombo woodlands and grasslands. The two ecotypes are consistently associated with different nuclear groups, which represent an advanced stage of divergence with secondary low-level gene flow. However, the seed-transported chloroplast genomes are consistently shared by distinct ecotypes inhabiting the same region. These patterns suggest that the nuclear genome of one ecotype can enter the seeds of the other via occasional pollen movements with sorting of nuclear groups in subsequent generations. The contrasting ecotypes of A. angusta can thus use each other as a gateway to new locations across a large part of Africa, showing that hybridization can facilitate the geographical dispersal of distinct ecotypes of the same grass species.
| Medienart: |
E-Artikel |
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| Erscheinungsjahr: |
2022 |
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| Erschienen: |
2022 |
| Enthalten in: |
Zur Gesamtaufnahme - volume:289 |
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| Enthalten in: |
Proceedings. Biological sciences - 289(2022), 1967 vom: 26. Jan., Seite 20212491 |
| Sprache: |
Englisch |
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| Beteiligte Personen: |
Curran, Emma V [VerfasserIn] |
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| Links: |
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| Themen: |
Dispersal |
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| Anmerkungen: |
Date Completed 16.05.2022 Date Revised 05.04.2024 published: Print-Electronic Dryad: 10.5061/dryad.3bk3j9km1 figshare: 10.6084/m9.figshare.c.5772175 Citation Status MEDLINE |
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| doi: |
10.1098/rspb.2021.2491 |
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| funding: |
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| Förderinstitution / Projekttitel: |
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| 500 | |a figshare: 10.6084/m9.figshare.c.5772175 | ||
| 500 | |a Citation Status MEDLINE | ||
| 520 | |a Genetic exchanges between closely related groups of organisms with different adaptations have well-documented beneficial and detrimental consequences. In plants, pollen-mediated exchanges affect the sorting of alleles across physical landscapes and influence rates of hybridization. How these dynamics affect the emergence and spread of novel phenotypes remains only partially understood. Here, we use phylogenomics and population genomics to retrace the origin and spread of two geographically overlapping ecotypes of the African grass Alloteropsis angusta. In addition to an ecotype inhabiting wetlands, we report the existence of a previously undescribed ecotype inhabiting Miombo woodlands and grasslands. The two ecotypes are consistently associated with different nuclear groups, which represent an advanced stage of divergence with secondary low-level gene flow. However, the seed-transported chloroplast genomes are consistently shared by distinct ecotypes inhabiting the same region. These patterns suggest that the nuclear genome of one ecotype can enter the seeds of the other via occasional pollen movements with sorting of nuclear groups in subsequent generations. The contrasting ecotypes of A. angusta can thus use each other as a gateway to new locations across a large part of Africa, showing that hybridization can facilitate the geographical dispersal of distinct ecotypes of the same grass species | ||
| 650 | 4 | |a Journal Article | |
| 650 | 4 | |a Research Support, Non-U.S. Gov't | |
| 650 | 4 | |a Poaceae | |
| 650 | 4 | |a dispersal | |
| 650 | 4 | |a ecology | |
| 650 | 4 | |a gene flow | |
| 650 | 4 | |a growth strategies | |
| 650 | 4 | |a hybridization | |
| 700 | 1 | |a Scott, Matilda S |e verfasserin |4 aut | |
| 700 | 1 | |a Olofsson, Jill K |e verfasserin |4 aut | |
| 700 | 1 | |a Nyirenda, Florence |e verfasserin |4 aut | |
| 700 | 1 | |a Sotelo, Graciela |e verfasserin |4 aut | |
| 700 | 1 | |a Bianconi, Matheus E |e verfasserin |4 aut | |
| 700 | 1 | |a Manzi, Sophie |e verfasserin |4 aut | |
| 700 | 1 | |a Besnard, Guillaume |e verfasserin |4 aut | |
| 700 | 1 | |a Pereira, Lara |e verfasserin |4 aut | |
| 700 | 1 | |a Christin, Pascal-Antoine |e verfasserin |4 aut | |
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