Natural hybridization and genetic and morphological variation between two epiphytic bromeliads

Neri, Jordana; Wendt, Tânia; Palma‐Silva, Clarisse

doi:10.1093/aobpla/plx061

Cited by 24 publications

(21 citation statements)

References 84 publications

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“…; Neri et al . , ) studies have recognised that selfing rather than outcrossing rates hamper hybridization and introgression, and thus represent an important pre‐zygotic reproductive isolation barrier. Hence, pollination behaviour and mating system variation are important pre‐zygotic reproductive barriers that act in combination in both hybrid zones.…”

Section: Discussionmentioning

confidence: 99%

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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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Section: Discussionmentioning

confidence: 99%

“…; Neri et al . , ), particularly among species found in geographically isolated habitats (Palma‐Silva et al . ; Wagner 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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“…Similarly, a study on epiphytic Bromeliads Vriesea sealaris and 1Vriesea simplex, showed high genetic differentiations between and within populations of V. scalaris (Neri et al 2017). The high genetic differentiation between populations and clear separation in cluster analysis indicated a restricted seed dispersal of H. formicarum (Nieder et al 2000;Mucciarelli et al 2014), and this restricted seed dispersal could lead to fine scale genetic differentiation and restricted gene flow (Theim et al 2014).…”

Section: Genetic Differentiation Between Populationsmentioning

confidence: 92%

LIMITED SEED DISPERSAL MAY SHAPE GENETIC STRUCTURE OF Hydnophytum formicarum JACK. POPULATIONS IN MANGROVE ECOSYSTEM

Yusoff,

Wan Omar,

Rohani

2020

BIOTROPIA

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Hydnophytum formicarum is an epiphytic plant, commonly distributed throughout Southeast Asia. However, its distribution is currently declining due to forest fragmentation and the subsequent habitat changes which may have also consequently affected the genetic structure of H. formicarum populations. Hence, this study aimed to understand the genetic variation and differentiation within and among populations of this species. Using Random Amplified Polymorphic DNA (RAPD) markers, the genetic variation and genetic differentiation among three populations were assessed in order to identify potential conservation management strategies for this species in the mangrove ecosystem in Malaysia. Ten highly reproducible primers were used in the population analysis, resulting in a total of 221 discernible fragments. Genetic variation among populations was high at 98% identified polymorphic fragments. AMOVA showed significant genetic differentiation among the populations (OPT = 0.554, p 0.001), with pairwise genetic distances between the populations ranging from 0.495-0.589. PCoA clustering analysis separated the populations according to their geographical locations. The high genetic variation within a population, high genetic differentiation between populations and clear separation in the cluster analysis indicated a restricted seed dispersal of the species.

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“…This information is also crucial to explore the evolution of reproductive barriers among populations and species (Costa et al, 2007;Pinheiro et al, 2013). For example, species with different mating systems may show greater reproductive isolation (Palma-Silva et al, 2015;Pinheiro et al, 2015;Twyford et al, 2015;Neri et al, 2017Neri et al, , 2018. The evolution of reproductive isolation has been central to species recognition since the influential works of Dobzhansky (1937) and Mayr (1942), which articulated the biological species concept.…”

Section: Multidisciplinary Approachesmentioning

confidence: 99%

“…The idea that species integrity is maintained even in the presence of low levels of interspecific gene exchange has altered the concept of "complete reproductive isolation," initially postulated in the biological species concept (Mayr, 1942), to "partially permeable reproductive isolation," known as a porous genome (Wu, 2001). Recent approaches have shown that a combination of multiple reproductive barriers to gene exchange act in concert, preventing the collapse of species (Palma-Silva et al, 2011;Vega et al, 2013;Marques et al, 2014;Pinheiro et al, 2016;Neri et al, 2017Neri et al, , 2018. Therefore, a multidisciplinary approach is crucial when studying barriers to gene exchange, which in turn will clarify the ecological and genetic mechanisms acting during species and lineage diversification.…”

Section: Multidisciplinary Approachesmentioning

confidence: 99%

Plant Species Complexes as Models to Understand Speciation and Evolution: A Review of South American Studies

Pinheiro

Dantas-Queiroz

Palma‐Silva

2018

Critical Reviews in Plant Sciences

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Identifying discontinuous entities within species complexes is a major topic in systematic and evolutionary biology. Comprehensive inventories describing and identifying species rapidly and correctly before they or their habitats disappear is especially important in megadiverse regions, such as South America continent, where a large part of the biodiversity is still unknown and remains to be discovered. Species complexes may account for a substantial number of plant groups in the South American flora, and studies investigating species boundaries in such challenging groups are needed. In this context, multidisciplinary approaches are crucial to understanding the species integrity and boundaries within species complexes. Morphometrics, cytogenetics, anatomy, crossing experiments, and molecular markers have been combined in different ways to investigate species complexes and have helped depict the mechanisms underlying the origin of South American species. Here, we review the current knowledge about plant species complexes on the hyperdiverse South American continent based on a detailed examination of the relevant literature. We discuss the main findings in light of the potential evolutionary mechanisms involved in speciation and suggest future directions in terms of integrating multispecies coalescence methods with several complementary types of morphological, ecological, and geographical data in this research field.

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Natural hybridization and genetic and morphological variation between two epiphytic bromeliads

Cited by 24 publications

References 84 publications

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

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

LIMITED SEED DISPERSAL MAY SHAPE GENETIC STRUCTURE OF Hydnophytum formicarum JACK. POPULATIONS IN MANGROVE ECOSYSTEM

Plant Species Complexes as Models to Understand Speciation and Evolution: A Review of South American Studies

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