Diversification of Bromelioideae (Bromeliaceae) in the Brazilian Atlantic rainforest: a case study in Aechmea subgenus Ortgiesia

Goetze, Márcia, Schulte, Katharina, Palma-Silva, Clarisse, Zanella, Camila M., Buttow, Miriam V., Capra, Fernanda, and Bered, Fernanda (2016) Diversification of Bromelioideae (Bromeliaceae) in the Brazilian Atlantic rainforest: a case study in Aechmea subgenus Ortgiesia. Molecular Phylogenetics and Evolution, 98. pp. 346-357.

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Aechmea subgenus Ortgiesia comprises ca. 20 species distributed in Brazil, Argentina, Paraguay, and Uruguay, with a center of diversity in the Brazilian Atlantic rainforest. We examined interspecific relationships of Ortgiesia based on Amplified Fragment Length Polymorphisms (AFLP). Ninety-six accessions belonging to 14 species of Ortgiesia were sampled, and genotyped with 11 AFLP primer combinations. The neighbor joining (NJ) tree depicted two main genetic groups within Aechmea subgenus Ortgiesia, and four subgroups. The NJ tree showed short internal branches, indicating an overall shallow genetic divergence among Ortgiesia species as expected for the recently radiated subfamily Bromelioideae. Our results suggest that hybridization and/or incomplete lineage sorting may have hampered the reconstruction of interspecific relationships in Aechmea subgenus Ortgiesia. The mapping of petal color (yellow, blue, pink, or white), inflorescence type (simple or compound), and inflorescence shape (ellipsoid, subcylindric, cylindric, or pyramidal) against the NJ tree indicated that these characters are of limited taxonomic use in Aechmea subgenus Ortgiesia due to homoplasy. An analysis of the current distribution of Ortgiesia identified the southern region of the Brazilian Atlantic rainforest, between latitudes of 26° and 27°S, as the center of diversity for the subgenus.

Item ID: 44203
Item Type: Article (Research - C1)
ISSN: 1095-9513
Keywords: Aechmea, AFLP, biogeography, core bromelioids, interspecific relationships, speciation
Date Deposited: 18 May 2016 07:31
FoR Codes: 31 BIOLOGICAL SCIENCES > 3104 Evolutionary biology > 310411 Plant and fungus systematics and taxonomy @ 30%
31 BIOLOGICAL SCIENCES > 3104 Evolutionary biology > 310410 Phylogeny and comparative analysis @ 40%
31 BIOLOGICAL SCIENCES > 3104 Evolutionary biology > 310402 Biogeography and phylogeography @ 30%
SEO Codes: 96 ENVIRONMENT > 9608 Flora, Fauna and Biodiversity > 960805 Flora, Fauna and Biodiversity at Regional or Larger Scales @ 50%
97 EXPANDING KNOWLEDGE > 970106 Expanding Knowledge in the Biological Sciences @ 50%
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