Pollination Mode and Mating System Explain Patterns in Genetic Differentiation in Neotropical Plants

Ballesteros‐Mejia, Liliana; Lima, Natácia Evangelista de; Lima‐Ribeiro, Matheus S.; Collevatti, Rosane G.

doi:10.1371/journal.pone.0158660

Cited by 34 publications

(27 citation statements)

References 51 publications

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“…At the population level, Passiflora spinosa —a liana likely pollinated by hummingbirds and potentially dispersed by fishes and mammals—showed as much genetic variation (i.e., H E and H O ) as Psychotria lupulina —a shrub pollinated by small bees and dispersed by fishes and birds (Macedo & Prance, ; Valencia, ). The genetic diversity levels reported for Passiflora spinosa and Psychotria lupulina are in line with those observed for other zoophilous and entomophilous plant species (Ballesteros‐Mejia, Lima, Lima‐Ribeiro, & Collevatti, ). However, the lower levels of genetic diversity observed for Amphirrhox longifolia —a plant species potentially dispersed by fishes and with floral traits compatible with pollination by bees and butterflies—suggested that other factors (e.g., mating and breeding systems, growth form, habitat, plant density, lifespan, taxon age) beyond pollination and seed dispersal can be affecting the levels of genetic diversity of this plant species.…”

Section: Discussionsupporting

confidence: 87%

Tangled banks: A landscape genomic evaluation of Wallace's Riverine barrier hypothesis for three Amazon plant species

2019

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Wallace's Riverine Barrier hypothesis is one of the earliest biogeographic explanations for Amazon speciation, but it has rarely been tested in plants. In this study, we used three woody Amazonian plant species to evaluate Wallace's Hypothesis using tools of landscape genomics. We generated unlinked single‐nucleotide polymorphism (SNP) data from the nuclear genomes of 234 individuals (78 for each plant species) across 13 sampling sites along the Rio Branco, Brazil, for Amphirrhox longifolia (8,075 SNPs), Psychotria lupulina (9,501 SNPs) and Passiflora spinosa (14,536 SNPs). Although significantly different migration rates were estimated between species, the population structure data do not support the hypothesis that the Rio Branco—an allopatric barrier for primates and birds—is a significant genetic barrier for Amphirrhox longifolia, Passiflora spinosa or Psychotria lupulina. Overall, we demonstrated that medium‐sized rivers in the Amazon Basin, such as the Rio Branco, are permeable barriers to gene flow for animal‐dispersed and animal‐pollinated plant species.

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Section: Discussionsupporting

confidence: 87%

Tangled banks: A landscape genomic evaluation of Wallace's Riverine barrier hypothesis for three Amazon plant species

2019

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“…Hamrick and Godt [30] also found evidence of the influence of life form on genetic diversity, with woody plants having slightly greater diversity than non-woody species with similar life-history traits. Ballesteros-Mejia et al [28] also recorded higher genetic diversity (h and π) in tree species in comparison with plants of smaller size, although grasses were not analyzed in this case. The lower genetic diversity recorded in the present study for grasses may be related to the widespread domestication of many species of this group.…”

Section: Discussionmentioning

confidence: 86%

“…However, life-history traits, such as pollination and seed dispersal modes have received little attention in terms of their potential contribution to the loss of genetic diversity. Ballesteros-Mejia et al [28] used the phylogenetic generalized least squares (PGLS) approach to explain the phylogenetic independence of the predictor variables and verify the robustness of the results of generalized linear models (GLMs) that confirmed the effects of the pollination mode and breeding system on the patterns of genetic differentiation in Neotropical plant species. A number of other studies [29][30][31][32] have attempted to relate genetic diversity to the life history traits of the plant, although as the data are not normally distributed, in general, they have either been transformed for the application of an analysis of variance (ANOVA) or a GLM has been applied.…”

Section: Introductionmentioning

confidence: 99%

Recent Trends in Research on the Genetic Diversity of Plants: Implications for Conservation

et al. 2019

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Genetic diversity and its distribution, both within and between populations, may be determined by micro-evolutionary processes, such as the demographic history of populations, natural selection, and gene flow. In plants, indices of genetic diversity (e.g., k, h and π) and structure (e.g., FST) are typically inferred from sequences of chloroplast markers. Given the recent advances and popularization of molecular techniques for research in population genetics, phylogenetics, phylogeography, and ecology, we adopted a scientometric approach to compile evidence on the recent trends in the use of cpDNA sequences as markers for the analysis of genetic diversity in botanical studies, over the years. We also used phylogenetic modeling to assess the relative contribution of relatedness or ecological and reproductive characters to the genetic diversity of plants. We postulated that genetic diversity could be defined not only by microevolutionary factors and life history traits, but also by relatedness, so that species more closely related phylogenetically would have similar genetic diversities. We found a clear tendency for an increase in the number of studies over time, confirming the hypothesis that the advances in the area of molecular genetics have supported the accumulation of data on the genetic diversity of plants. However, we found that the vast majority of these data have been produced by Chinese authors, and refer specifically to populations of Chinese plants. Most of the data on genetic diversity have been obtained for species in the International Union for Conservation of Nature (IUCN) category NE (Not Evaluated), which indicates a relative lack of attention on threatened species. In general, we observed very high FST values in the groups analyzed and, as we focused primarily on species that have not been evaluated by the IUCN, the number of plant species that are threatened with extinction may be much greater than that indicated by the listing of this organization. We also found that the number of haplotypes (k) was influenced by the type of geographic distribution of the plant, while haplotype diversity (h) was affected by the type of flower, and the fixation index (FST), by the type of habitat. The plant species most closely-related phylogenetically have similar levels of genetic diversity. Overall, then, it will important to consider phylogenetic dependence in future studies that evaluate the effects of life-history traits on plant genetic diversity.

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“…The finding that subpopulations were not observed is interesting because Pf is a self‐pollinating species, as indicated by the high homozygosity of the analyzed accessions ( F ‐index median = 0.94). Indeed, it is expected for a self‐pollinating species to rapidly differentiate (Zohary, 1999; Ballesteros‐Mejia et al, 2016).…”

Section: Discussionmentioning

confidence: 99%

Drought Response and Genetic Diversity in Pisum fulvum, a Wild Relative of Domesticated Pea

et al. 2017

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Productivity of grain crops in semi‐arid environments is often affected by drought, which is likely to increase due to predicted climate changes. Wild pea (Pisum fulvum Sibth. & Smith, Pf) accessions sampled across its ecological amplitude in Israel (350–850 mm annual precipitation) were used to assess the genetic diversity for drought responses. We hypothesized that native species evolving under Eastern Mediterranean climate carry adaptive traits to cope with drought stress. Accessions were classified according to single‐nucleotide polymorphism variation pattern and habitat ecogeographic parameters. Significant differences were found between the accession groups, but grouping in both systems did not match. Subsequently, 52 Pf accessions and three domesticated pea (P. sativum L.) genotypes were evaluated during 2 yr under well‐watered (∼580 mm) and water‐limited (∼340 mm) treatments. Total dry matter, grain yield, harvest index, and average grain weight were higher in domesticated pea than wild Pf; however several Pf accessions exhibited lower drought susceptibility indices (i.e., greater stability across environments) than domesticated genotypes. Of special interest are a number of Pf genotypes in which low susceptibility to water stress was coupled with relatively high productivity. The sampling habitats of those low susceptibility–high productivity accessions are characterized by mild (400–530 mm) annual precipitation. Further sampling and evaluation of Pf from such locations may improve our understanding of pea drought adaptation and yield physiology.

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Pollination Mode and Mating System Explain Patterns in Genetic Differentiation in Neotropical Plants

Cited by 34 publications

References 51 publications

Tangled banks: A landscape genomic evaluation of Wallace's Riverine barrier hypothesis for three Amazon plant species

Tangled banks: A landscape genomic evaluation of Wallace's Riverine barrier hypothesis for three Amazon plant species

Recent Trends in Research on the Genetic Diversity of Plants: Implications for Conservation

Drought Response and Genetic Diversity in Pisum fulvum, a Wild Relative of Domesticated Pea

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