Geographical structure of genetic diversity in Loudetia simplex (Poaceae) in Madagascar and South Africa
| Autor: | Jordi Salmona, Maria S. Vorontsova, Guillaume Besnard, Alexander S. T. Papadopulos, Peter Anton Hagl, Michael F. Fay, Caroline E. R. Lehmann, Uxue Suescun, Cédrique L. Solofondranohatra, Nantenaina H. Rakotomalala, Roberta Gargiulo |
|---|---|
| Přispěvatelé: | Centre National de la Recherche Scientifique (CNRS) |
| Jazyk: | angličtina |
| Rok vydání: | 2021 |
| Předmět: |
0106 biological sciences
0301 basic medicine Population genetics Loudetia simplex Plant Science [SDV.BID.SPT]Life Sciences [q-bio]/Biodiversity/Systematics Phylogenetics and taxonomy 010603 evolutionary biology 01 natural sciences Grassland 03 medical and health sciences Tristachya parasitic diseases Poaceae Ecology Evolution Behavior and Systematics 2. Zero hunger Genetic diversity geography geography.geographical_feature_category biology Ecology food and beverages 15. Life on land biology.organism_classification [SDE.ES]Environmental Sciences/Environmental and Society 030104 developmental biology Panicoideae Microsatellite [SDE.BE]Environmental Sciences/Biodiversity and Ecology |
| Zdroj: | Botanical Journal of the Linnean Society Botanical Journal of the Linnean Society, Linnean Society of London, 2021, 196 (1), pp.81-99. ⟨10.1093/botlinnean/boaa098⟩ |
| ISSN: | 0024-4074 1095-8339 |
| Popis: | Ecologically dominant species are primary determinants of ecosystem function, especially in grassy ecosystems, but the history and biology of grassy ecosystems in Madagascar are poorly understood compared to those of Africa. Loudetia simplex is a C4 perennial grass that is adapted to fire and common to dominant across Africa. It is also widespread across central Madagascar in what are often thought to be human-derived grasslands, leading us to question how recently L. simplex arrived and how it spread across Madagascar. To address this, we collected population genetic data for 11 nuclear and 11 plastid microsatellite loci, newly developed for this study, for > 200 accessions from 78 populations of L. simplex, primarily from Madagascar and South Africa. Malagasy and African populations are genetically differentiated and harbour distinct plastid lineages. We demonstrate distinct geographically clustered diploid, tetraploid and hexaploid groups. The Malagasy hexaploid populations cluster into northern and southern types. In South Africa, diploid populations in the Drakensberg are distinct from tetraploid populations in north-eastern South Africa. Different genetic clusters are associated with significantly different precipitation and temperature. We conclude that L. simplex is native to both Madagascar and South Africa, probably with a single colonization event from Africa to Madagascar followed by pre-human diversification of L. simplex populations in Madagascar. |
| Databáze: | OpenAIRE |
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