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Breeding systems of Bromeliaceae species: evolution of selfing in the context of sympatric occurrence
The results suggest that self-compatibility is common for Bromeliaceae and do not support the traditional hypothesis of reproductive assurance used to explain the evolution of selfing.
Cladistic Relationships of Aechmea (Bromeliaceae, Bromelioideae) and Allied Genera
A morphology-based phylogenetic analysis using parsimony was conducted with 86 taxa, including 52 Aechmea and putatively related genera in subfamily Bromelioideae, and the topology of the consensus tree suggests that Acanthostachys, Billbergia, Portea, and non-Brazilian Ronnbergia may be monophyletic.
Reproductive biology and natural hybridization between two endemic species of Pitcairnia (Bromeliaceae).
Pollination biology and breeding systems in hybridizing populations of Pitcairnia albiflos and P. staminea, endemic to rocky outcrops at Rio de Janeiro, Brazil, are investigated, finding that both species are morphologically distinct and easily recognized by floral color and the hybrids showed equivalent fitness, except for lower pollen viability.
An apparent lack of prezygotic reproductive isolation among 42 sympatric species of Bromeliaceae in southeastern Brazil
The Atlantic rainforest in southeastern Brazil is one the main centers of diversification of Bromeliaceae, and a community of 42 sympatric bromeliad species, represented by nine genera, were surveyed to assess the role of microhabitat isolation, phenological isolation and ethological isolation as potential prezygotic barriers.
Bromeliaceae diversity and conservation in Minas Gerais state, Brazil
Field work and data from herbaria collections (2686 records) representing 283 taxa (265 species and 18 infraspecific taxa) of Bromeliaceae occurring at Minas Gerais state, southeastern Brazil, were
Sympatric bromeliad species (Pitcairnia spp.) facilitate tests of mechanisms involved in species cohesion and reproductive isolation in Neotropical inselbergs
The results suggest that incomplete lineage sorting, hybridization and introgression form integral aspects of adaptive radiation in Neotropical inselberg ‘archipelagos’, which should be of special interest to students of speciation in mountain systems, and to ongoing conservation programmes in the Atlantic Rainforest biodiversity hotspot.
Selfing facilitates reproductive isolation among three sympatric species of Pitcairnia (Bromeliaceae)
The absence of temporal isolation, geographic isolation and isolation via post-pollination reproduction suggests that evolution toward selfing was important to avoid hybridization between these sympatric species.
High abundance of dioecious plants in a tropical coastal vegetation.
It is argued that the high abundance of dioecious plants in this resource-poor environment can be attributed to ecological traits related to long-distance dispersal, ecological vigor, and possibly, vegetative reproduction.
Phylogenetic Relationships in Bromeliaceae Subfamily Bromelioideae based on Chloroplast DNA Sequence Data
A phylogenetic analysis within subfamily Bromelioideae using three chloroplast DNA regions, with the inclusion of multiple species from a broad sampling of bromelioid genera, found Aechmea, the most morphologically diverse genus within the subfamily, was highly polyphyletic.
Speciation dynamics and biogeography of Neotropical spiral gingers (Costaceae).