Separation in flowering time contributes to the maintenance of sympatric cryptic plant lineages

Michalski, Stefan G.; Durka, Walter

doi:10.1002/ece3.1481

Cited by 16 publications

(19 citation statements)

References 82 publications

(128 reference statements)

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“…Thus, the differences observed among studied populations emphasize the importance of studying hybrid zones from different localities across the geographical distribution of the species, since ecological factors that act differently (e.g. by latitudinal gradients) can affect some RI mechanisms in different species (Martin & Willis, 2007;Michalski & Durka, 2015). Populations at lower latitudes showed interspecific gene flow, and populations further south did not.…”

Section: Hybridization Patterns Across Sympatric Populationsmentioning

confidence: 92%

“…Thus, the differences observed among studied populations emphasize the importance of studying hybrid zones from different localities across the geographical distribution of the species, since ecological factors that act differently (e.g. The heterogeneity can occur due to differences in the local relative abundance of each species (Lepais et al, 2009) or local ecological circumstances, factors that may impact the rate of production of hybrids (Williams et al, 2001;Martin & Willis, 2007;Michalski & Durka, 2015). Populations at lower latitudes showed interspecific gene flow, and populations further south did not.…”

Section: Hybridization Patterns Across Sympatric Populationsmentioning

confidence: 95%

“…We observed only 17 hybrids (8.29%) in two out the four sympatric populations studied and the difference in the flowering period may be acting as a permeable barrier to interspecific gene flow. Differences in flowering phenology act as RI factors in some other bromeliads (Gardner, 1984;Gonc ßalves & Azevêdo-Gonc ßalves, 2009;Matos, 2011;Palma-Silva et al, 2011) and in other plant species (Martin & Willis, 2007;Pascarella, 2007;Marques et al, 2012;Thomasset et al, 2014;Michalski & Durka, 2015). Gardner (1984) found few putative hybrids with intermediate morphological characteristics between Tillandsia punctulata Schltdl.…”

Section: Evidence Of Hybridization Betweenmentioning

confidence: 99%

“…Hybridization between closely related species is a common phenomenon, especially in sympatric areas and can reflect recent divergence time and varying degrees of RI in plants. Lexer et al, 2005;Martin, Bouck & Arnold, 2007;Pinheiro et al, 2010;Zeng et al, 2011;Michalski & Durka, 2015). Natural hybridization and weak RI in congeneric species have been reported for numerous species (e.g.…”

Section: Introductionmentioning

confidence: 99%

“…Natural hybridization and weak RI in congeneric species have been reported for numerous species (e.g. Lexer et al, 2005;Martin, Bouck & Arnold, 2007;Pinheiro et al, 2010;Zeng et al, 2011;Michalski & Durka, 2015). A combination of different types of molecular markers can provide valuable information about the occurrence and dynamics of the hybridization process, which can differ according to the population studied.…”

Section: Introductionmentioning

confidence: 99%

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Hybridization between two sister species of Bromeliaceae:Vriesea carinataandV. incurvata

et al. 2016

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Studies on interspecific gene flow and hybridization are important for understanding speciation processes and the movement of genes across species boundaries. In sympatric areas, hybridization between closely related species can be a common phenomenon and the degree of reproductive isolation (RI) among these species is closely related to the probability of hybrid formation. Here, using 14 nuclear microsatellites and two plastid DNA regions, we investigated the occurrence of natural hybridization in four sympatric populations of Vriesea carinata and V. incurvata. We also analysed four allopatric populations (two from each species), totalling 272 samples. These species share pollinators and have sequential flowering with a short period of overlap. Based on genetic assignment tests, 17 hybrids were detected in two of the four sympatric populations studied (8.29% of the individuals sampled). Our results showed low levels of nuclear (F ST = 0.098) and high plastid genetic differentiation (F ST = 0.601), with no haplotype sharing between parental species. The presence of plastid DNA haplotypes of both parental species in the hybrids indicated that hybridization probably occurred in both directions. We identified few hybrids, probably in consequence of some degree of RI between these species. Several RI barriers may be acting to maintain species integrity, temporal flowering differences being one important factor.

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Section: Hybridization Patterns Across Sympatric Populationsmentioning

confidence: 92%

“…Thus, the differences observed among studied populations emphasize the importance of studying hybrid zones from different localities across the geographical distribution of the species, since ecological factors that act differently (e.g. The heterogeneity can occur due to differences in the local relative abundance of each species (Lepais et al, 2009) or local ecological circumstances, factors that may impact the rate of production of hybrids (Williams et al, 2001;Martin & Willis, 2007;Michalski & Durka, 2015). Populations at lower latitudes showed interspecific gene flow, and populations further south did not.…”

Section: Hybridization Patterns Across Sympatric Populationsmentioning

confidence: 95%

Section: Evidence Of Hybridization Betweenmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Hybridization between two sister species of Bromeliaceae:Vriesea carinataandV. incurvata

et al. 2016

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Ecological differentiation and sympatry of cryptic species in the Sphagnum magellanicum complex (Bryophyta)

Nieto‐Lugilde,

Piatkowski

et al. 2024

American J of Botany

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PremiseSphagnum magellanicum (Sphagnaceae, Bryophyta) has been considered to be a single semi‐cosmopolitan species, but recent molecular analyses have shown that it comprises a complex of at least seven reciprocally monophyletic groups, that are difficult or impossible to distinguish morphologically.MethodsNewly developed barcode markers and RADseq analyses were used to identify species among 808 samples from 119 sites. Molecular approaches were used to assess the geographic ranges of four North American species, the frequency at which they occur sympatrically, and ecological differentiation among them. Microhabitats were classified with regard to hydrology and shade. Hierarchical modelling of species communities was used to assess climate variation among the species. Climate niches were projected back to 22,000 years BP to assess the likelihood that the North American species had sympatric ranges during the late Pleistocene.ResultsThe species exhibited parallel morphological variation, making them extremely difficult to distinguish phenotypically. Two to three species frequently co‐occurred within peatlands. They had broadly overlapping microhabitat and climate niches. Barcode‐ versus RADseq‐based identifications were in conflict for 6% of the samples and always involved S. diabolicum vs. S. magniae.ConclusionsThese species co‐occur within peatlands at scales that could permit interbreeding, yet they remain largely distinct genetically and phylogenetically. The four cryptic species exhibited distinct geographic and ecological patterns. Conflicting identifications from barcode vs. RADseq analyses for S. diabolicum versus S. magniae could reflect incomplete speciation or hybridization. They comprise a valuable study system for additional work on climate adaptation.

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Microsatellites and petal morphology reveal new patterns of admixture in Orchis hybrid zones

Bersweden

Viruel

Schatz

et al. 2021

American J of Botany

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The genetic structure of hybrid zones provides insight into the potential for gene flow to occur between plant taxa. Four closely related European orchid species (Orchis anthropophora, O. militaris, O. purpurea, and O. simia) hybridize when they co-occur. We aimed to characterize patterns of hybridization in O. militaris-O. purpurea, O. purpurea-O. simia, and O. anthropophora-O. simia hybrid zones using molecular and morphological data. Methods: We used 11 newly isolated nuclear microsatellites to genotype 695 individuals collected from seven hybrid zones and six allopatric parental populations in France. Geometric morphometric analysis was conducted using 15 labellum landmarks to capture the main aspects of petal shape. Results: Backcrossing was asymmetric toward O. militaris in multiple O. militaris-O. purpurea hybrid zones. Hybrids in O. purpurea-O. simia and O. anthropophora- O. simia hybrid zones were largely limited to F1 and F2 generations, but further admixture had occurred. These patterns were reflected in labellum geometric morphometric data, which correlated strongly with nuclear microsatellite data in all three species combinations. Conclusions: The coexistence of parental and admixed individuals in these Orchis hybrid zones implies they are likely to be tension zones being maintained by a balance between gene flow into the hybrid zone and selection acting against admixed individuals. The pattern of admixture in the three species combinations suggests intrinsic selection acting on the hybrids is weaker in more closely related taxa.

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Separation in flowering time contributes to the maintenance of sympatric cryptic plant lineages

Cited by 16 publications

References 82 publications

Hybridization between two sister species of Bromeliaceae:Vriesea carinataandV. incurvata

Hybridization between two sister species of Bromeliaceae:Vriesea carinataandV. incurvata

Ecological differentiation and sympatry of cryptic species in the Sphagnum magellanicum complex (Bryophyta)

Microsatellites and petal morphology reveal new patterns of admixture in Orchis hybrid zones

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