Incomplete lineage sorting and hybridization in the evolutionary history of closely related, endemic yellow‐flowered <i>Aechmea</i> species of subgenus <i>Ortgiesia</i> (Bromeliaceae)

Göetze, Márcia; Zanella, Camila Martini; Palma‐Silva, Clarisse; Büttow, Miriam Valli; Bered, Fernanda

doi:10.3732/ajb.1700103

Cited by 32 publications

(18 citation statements)

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“…as has been observed for other bromeliad species (Goetze, Zanella, Palma-Silva, Büttow, & Bered, 2017;Palma-Silva et al, 2009;Zanella et al, 2016). The low genetic variation among localities within taxa suggests that intra-taxon gene flow has been maintained ( Figure S2, Appendix S2).…”

Section: Climatic Drivers Of Morphological Traitssupporting

confidence: 83%

“…On the other hand, the V. incurvata and V. taritubensis varieties showed moderate to high intraspecific genetic diversity and intraspecific gene flow (Table 1; Tables S1 and S3, Figure S2, Appendix S2), as has been observed for other bromeliad species (Goetze, Zanella, Palma-Silva, Büttow, & Bered, 2017;Palma-Silva et al, 2009;Zanella et al, 2016). The low genetic variation among localities within taxa suggests that intra-taxon gene flow has been maintained ( Figure S2, Appendix S2).…”

Section: F I G U R E 4 (A) Principal Componentmentioning

confidence: 65%

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Drivers of bromeliad leaf and floral bract variation across a latitudinal gradient in the Atlantic Forest

Neves

Zanella

Kessous

et al. 2019

Journal of Biogeography

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Aim: Understanding the complex interaction and relative contributions of factors involved in species and trait diversification is crucial to gain insights into the evolution of Neotropical biodiversity. Here, we investigated the drivers of morphological variation in bromeliads along a latitudinal gradient in a biodiversity hotspot. Location: Atlantic Forest, Brazil.Taxon: A species complex in the genus Vriesea (Bromeliaceae). Methods:We measured shape and size variation for 208 floral bracts and 176 leaves in individuals from 14 localities using geometric morphometrics. We compiled data for two chloroplast regions (matK and trnL-F) from 89 individuals to assess genetic diversity, population structure and phylogenetic relationships. We tested the influence of climate, altitude and genetic distance on morphological traits using linear statistical models.Results: Temperature seasonality is a main driver of floral bract shape. Together with precipitation, it also explains changes in leaf size across the latitudinal gradient. Shifts in morphological traits are correlated with genetic structure and partly support the recent taxonomic delimitation proposed for the species complex. The species started to diversify in the Pliocene ca. 5 Mya. We detected a phylogeographical break in species distribution into northern and southern clades between the Bocaina region and the southern portion of the Atlantic Forest. Main Conclusions:We identify how geography and environmental changes through time shape floral bracts and leaves in similar ways. At highly seasonal sites with lower annual precipitation (in the southern subtropical portion of the Atlantic Forest), leaves are larger and floral bracts are wide-elliptic, making them better suited for increased water accumulation. In contrast, at less seasonal sites (in the tropical north, where rainfall is more abundant and temperatures are higher), leaves are narrower and floral bracts are lanceolate-shaped, facilitating water drainage. The biogeographical break we identified suggests a role of tectonic activity and climatic oscillations in promoting species divergence and diversification.

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Section: Climatic Drivers Of Morphological Traitssupporting

confidence: 83%

Section: F I G U R E 4 (A) Principal Componentmentioning

confidence: 65%

Drivers of bromeliad leaf and floral bract variation across a latitudinal gradient in the Atlantic Forest

Neves

Zanella

Kessous

et al. 2019

Journal of Biogeography

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“…Goetze et al. () also reported that populations of Aechmea Ruiz and Pav. (Bromeliaceae) species from the same region harbor the greatest number of haplotypes.…”

Section: Discussionmentioning

confidence: 92%

Ecological niche modeling and a lack of phylogeographic structure in Vriesea incurvata suggest historically stable areas in the southern Atlantic Forest

Aguiar-Melo

Zanella

Göetze

et al. 2019

American J of Botany

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Premise Despite the efforts to understand the processes that shape neotropical biodiversity, the complexity of certain biomes, such as the Atlantic Forest (AF), prevents the generalization of patterns. Initially, ecological niche modeling (ENM), with phylogeographic studies, identified past stable areas in the central and northern portions of the AF, while the southern portion was thought to be highly fragmented. Here, we examined the phylogeography, historical patterns, genetic diversity, and population structure of Vriesea incurvata, an endemic species of the southern portion of the AF. Methods We evaluated 149 individuals using two plastid DNA regions (cpDNA) and 13 nuclear microsatellite markers (nuSSRs) to access the historical patterns, genetic diversity, and structure of V. incurvata populations. We also conducted historical demography and ENM analyses. Results We found moderate to high genetic diversity and low population structure for both genomes. The cpDNA network revealed high haplotype sharing. The ENM suggested no drastic changes in suitable areas for V. incurvata occurrence, corroborating the finding of no phylogeographic structure. Conclusions Contrary to some studies, our results indicate that the southern AF was a historically stable climate region for V. incurvata occupation after southward colonization by the species. Past climatic changes probably did not cause structuring among its populations.

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“…; Goetze et al . ; Neri et al . , ), particularly among species found in geographically isolated habitats (Palma‐Silva et al .…”

Section: Discussionmentioning

confidence: 99%

The role of hybridization and introgression in maintaining species integrity and cohesion in naturally isolated inselberg bromeliad populations

et al. 2018

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Hybridization is a widespread phenomenon present in numerous lineages across the tree of life. Its evolutionary consequences range from effects on the origin and maintenance, to the loss of biodiversity. We studied genetic diversity and intra- and interspecific gene flow between two sympatric populations of closely-related species, Pitcairnia flammea and P. corcovadensis (Bromeliaceae), which are adapted to naturally fragmented Neotropical inselbergs, based on nuclear and plastidial DNA. Our main results indicate a strong reproductive isolation barrier, although low levels of interspecific gene flow were observed in both sympatric populations. The low rates of intraspecific gene flow observed for both P. corcovadensis and P. flammea populations corroborate the increasing body of evidence that inselberg bromeliad species are maintained as discrete evolutionary units despite the presence of low genetic connectivity. Nuclear patterns of genetic diversity and gene flow revealed that hybridization and introgression might not cause species extinction via genetic assimilation of the rare P. corcovadensis. In the face of reduced intraspecific gene exchange, hybridization and introgression may be important aspects of the Pitcairnia diversification process, with a positive evolutionary impact at the bromeliad community level, and thus contribute to increasing and maintaining genetic diversity in local isolated inselberg populations.

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Incomplete lineage sorting and hybridization in the evolutionary history of closely related, endemic yellow‐flowered Aechmea species of subgenus Ortgiesia (Bromeliaceae)

Cited by 32 publications

References 83 publications

Drivers of bromeliad leaf and floral bract variation across a latitudinal gradient in the Atlantic Forest

Drivers of bromeliad leaf and floral bract variation across a latitudinal gradient in the Atlantic Forest

Ecological niche modeling and a lack of phylogeographic structure in Vriesea incurvata suggest historically stable areas in the southern Atlantic Forest

The role of hybridization and introgression in maintaining species integrity and cohesion in naturally isolated inselberg bromeliad populations

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