Genetic structure and phenotypic variation in wild populations of the medicinal tetraploid species <i>Bromelia antiacantha</i> (Bromeliaceae)

Zanella, Camila Martini; Bruxel, Manuela; Paggi, Gecele Matos; Göetze, Márcia; Büttow, Miriam Valli; Cidade, Fernanda Witt; Bered, Fernanda

doi:10.3732/ajb.1000458

Cited by 33 publications

(17 citation statements)

References 51 publications

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“…Among the important factors that increase/maintain genetic variation within populations are gene flow from multiple source populations, explosive population growth, and a lack of bottleneck during colonization events (Ilves et al., ; Jermakowicz et al., ). On the other hand, all localities except CRP significantly departed from the HWE (Table ) because of the high proportion of homozygotes, which is common in bromeliads (Palma‐Silva et al., ; Zanella et al., , ; Soares et al., ). Heterozygote deficiency may result from many factors, such as genetic drift and inbreeding, and may be closely related with the breeding system of the species (Hamrick and Godt, ).…”

Section: Discussionmentioning

confidence: 97%

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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Section: Discussionmentioning

confidence: 97%

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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“…4 ). ( Zanella et al, 2011 ), all of them from the Atlantic forest. In all these studies, the observed heterozygosity was lower than expected, due to a defi cit of heterozygotes.…”

Section: Patterns Of Population Divergence and Gene Fl Ow -Thementioning

confidence: 99%

Population genetics of the endemic and endangered Vriesea minarum (Bromeliaceae) in the Iron Quadrangle, Espinhaço Range, Brazil

Lavor

Berg

Jacobi

et al. 2014

American J of Botany

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• Premise of the study: Knowledge about genetic variability in plant populations is one of the main branches of conservation genetics, linking genetic data to conservation strategies. Vriesea minarum is a bromeliad endemic to the Iron Quadrangle region (southeastern Brazil), occurring on mountaintop rock outcrops. It is listed as endangered due to habitat loss, particularly from iron ore mining. Thus, determining the structure and genetic diversity of V. minarum populations could help develop strategies to conserve the species.• Methods: We studied the genetic structure of 12 populations of V. minarum using 10 microsatellite loci transferred from other species of Bromeliaceae. Statistical analyses to compare and describe the genetic diversity of each population were performed, and genetic structure within and among populations, isolation by distance, and Bayesian structure were also analyzed.• Key results: Our results show high inbreeding (G = 0.376) and low population structure (F = 0.088), possibly related to high gene flow due to great pollinator efficiency and/or efficient seed dispersal, thus leading to high connectivity among populations of these fragmented rock outcrops. Two clusters were observed, corresponding to the basins of rivers São Francisco and Doce.• Conclusions: Gene flow among populations is high but, given the rate of habitat loss to mining, most populations are vulnerable and will become increasingly isolated if no action is taken to preserve them. Thus, conservation of this species depends on in situ and ex situ actions, such as controlling overexploitation and creating a germoplasm bank.

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“…Bromeliads are famous for their ecological plasticity that allows them to occupy a great variety of terrestrial and epiphytic habitats (Benzing 2000). Diverse breeding systems and pollination modes have been found in Bromeliaceae, ranging from predominantly outcrossing to predominantly inbreeding, but the number of case studies on the reproductive strategies of particular species and genera is still limited (Vervaeke et al 2001;Wendt et al 2001Wendt et al , 2002Palma-Silva et al 2009;Matallana et al 2010;Zanella et al 2011;Christianini et al 2013).…”

Section: Introductionmentioning

confidence: 99%

Reproduction biology and chloroplast inheritance in Bromeliaceae: a case study in Fosterella (Pitcairnioideae)

et al. 2015

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We applied a series of intra-and interspecific in situ cross-pollination experiments under greenhouse conditions to evaluate the breeding systems in four Fosterella species (Pitcairnioideae s.str.; Bromeliaceae). Viable hybrids were produced between each pair of the investigated species, suggesting that reproduction barriers may be low also under natural conditions. Seed germination rates proved to be high in each crossing treatment, indicating a high viability of the artificial hybrids. Large numbers of seeds were produced after both closed and open pollination treatments, suggesting that autogamy may be a major reproductive strategy in the genus. Our results support the concept that self-compatibility is an appropriate way to avoid natural hybridization in Bromeliaceae and could assist in maintaining species integrity in the presence of pollen flow. Paternity was verified in all crosses by genotyping parents and offspring with a set of polymorphic nuclear microsatellite markers. To study the mode of chloroplast inheritance, we developed a novel set of 24 chloroplast microsatellite markers using 454 pyrosequencing technology, and applied four of these markers for genotyping parents and offspring from all crosses. Our results clearly demonstrated a maternal inheritance of plastids.

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Genetic structure and phenotypic variation in wild populations of the medicinal tetraploid species Bromelia antiacantha (Bromeliaceae)

Cited by 33 publications

References 51 publications

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

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

Population genetics of the endemic and endangered Vriesea minarum (Bromeliaceae) in the Iron Quadrangle, Espinhaço Range, Brazil

Reproduction biology and chloroplast inheritance in Bromeliaceae: a case study in Fosterella (Pitcairnioideae)

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