Out of Transcaucasia: Origin of Western and Central Palearctic populations of Microthlaspi perfoliatum

Ali, Tahir; Muñoz‐Fuentes, Violeta; Buch, Ann-Katrin; Çelik, Ali; Dutbayev, Ayan; Gabrielyan, Ivan; Glynou, Kyriaki; Kachour, Leila; Khaliq, Imran; Kitner, Miloslav; Nigrelli, Lisa; Ploch, Sebastián; Runge, Fabian; Solovyeva, Irina; Schmuker, Angelika; Vakhrusheva, L. P.; Xia, Xiaojuan; Maciá‐Vicente, Jose G.; Nowak, Carsten; Thines, Marco

doi:10.1016/j.flora.2019.02.012

Cited by 12 publications

(7 citation statements)

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“…Moreover, Anatolia, the Balkans, and the Iberian and Italian peninsulas, have served as refugia for many species during the Quaternary glaciations ( Hewitt, 2004 ; Míguez et al, 2017 ; Thompson, 2020 ). Thus, the region became not only an important refuge for many animals and plants but also a source area for the colonization of other regions during the Holocene, after glaciations ( Hewitt, 2004 ; Ali et al, 2019 ; Thompson, 2020 ). Climatic oscillations during the Quaternary also led species’ ranges to contract and expand, producing diversification ( Avise, 2000 ; Maguilla et al, 2017 ; Schneeweiss et al, 2017 ).…”

Section: Introductionmentioning

confidence: 99%

Polyploidy Expands the Range of Centaurium (Gentianaceae)

et al. 2021

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The Mediterranean region is one of the most important worldwide hotspots in terms of number of species and endemism, and multiple hypotheses have been proposed to explain how diversification occurred in this area. The contribution of different traits to the diversification process has been evaluated in different groups of plants. In the case of Centaurium (Gentianaceae), a genus with a center of diversity placed in the Mediterranean region, polyploidy seems to have been an important driver of diversification as more than half of species are polyploids. Moreover, ploidy levels are strongly geographically structured across the range of the genus, with tetraploids distributed towards more temperate areas in the north and hexaploids in more arid areas towards the south. We hypothesize that the diversification processes and biodiversity patterns in Centaurium are explained by the coupled formation of polyploid lineages and the colonization of different areas. A MCC tree from BEAST2 based on three nuclear DNA regions of a total of 26 taxa (full sampling, of 18 species and 8 subspecies) was used to perform ancestral area reconstruction analysis in “BioGeoBEARS.” Chromosome evolution was analyzed in chromEvol and diversification in BAMM to estimate diversification rates. Our results suggest that two major clades diverged early from the common ancestor, one most likely in the western Mediterranean and the other in a widespread area including west and central Asia (but with high uncertainty in the exact composition of this widespread area). Most ancestral lineages in the western clade remained in or around the western Mediterranean, and dispersal to other areas (mainly northward and eastward), occurred at the tips. Contrarily, most ancestral lineages in the widespread clade had larger ancestral areas. Polyploidization events in the western clade occurred at the tips of the phylogeny (with one exception of a polyploidization event in a very shallow node) and were mainly tetraploid, while polyploidization events occurred in the widespread clade were at the tips and in an ancestral node of the phylogeny, and were mainly hexaploid. We show how ancestral diploid lineages remained in the area of origin, whereas recent and ancestral polyploidization could have facilitated colonization and establishment in other areas.

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Section: Introductionmentioning

confidence: 99%

Polyploidy Expands the Range of Centaurium (Gentianaceae)

et al. 2021

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“…Compared with other studies on annual plants using AFLPs, it is slightly higher than that observed in Aegilops geniculata Roth (11%; Arrigo et al, 2010), and moderately lower than in Microthlaspi perfoliatum (L.) F.K.Mey. (16.7%; Ali et al, 2019), Astragalus edulis Bunge (19.6%; Peñas de Giles et al, 2016), and Euphrasia wettsteinii G.L. Gussarova (19.8%; Gussarova et al, 2012).…”

Section: Discussionmentioning

confidence: 99%

Phylogeography and ecological differentiation of strictly Mediterranean taxa: the case of the Iberian endemic Odontites recordonii

Pinto-Carrasco

Delgado

Agudo

et al. 2021

American J of Botany

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Premise Ecological drivers for genetic differentiation in Mediterranean climates are still underexplored. We have used the strictly Mediterranean endemic Odontites recordonii as a model species to address this question. This species is one of the three Iberian representatives of the O. vernus group, which are morphologically similar. Thus, it was additionally necessary to clarify their phylogenetic relationships. Methods We used amplified fragment length polymorphisms to reveal phylogenetic relationships within O. vernus group, and to reconstruct the phylogeographic patterns within O. recordonii. Additionally, ecological niche models were generated to detect refugia along the Quaternary climatic oscillations. And finally, alleles under natural selection were identified, and correlations between allele presences and environmental variables were calculated in order to shed light on the ecological drivers promoting differentiation. Results The three species from the O. vernus group were recovered as distinct species. Three genetic groups were found within O. recordonii and a putative refugium was detected for each one. Eighty‐one alleles could be under diversifying selection, and 58 alleles showed significant correlations with environmental variables, especially with temperature and precipitation seasonality and summer drought. Conclusions The three Iberian species of the O. vernus group are reciprocal monophyletic taxa. The three genetic groups of O. recordonii could have been restricted to narrow refugia during the Quaternary and displayed present distributions in accordance with bioclimatic conditions. Temperature and precipitation seasonality and the intensity of summer drought are definitory climatic parameters of Mediterranean‐type climates, and they could have acted as drivers of genetic differentiation on O. recordonii.

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“…2014). As a result, while the classical contraction-expansion paradigm (Hewitt, 1996) can serve as a robust model for explaining observed patterns in widespread woody or herbaceous plant species (Taberlet et al, 1998;Nieto Feliner, 2014) it can not be generalized to southern European lineages which are influenced more by complex local dynamics (Nieto Feliner, 2014;Ali et al, 2016Ali et al, , 2019.…”

Section: Discussionmentioning

confidence: 99%

Ecological specialization promotes diversity and diversification in the East Mediterranean genusRicotia(Brassicaceae)

Özüdoğru

Karacaoğlu

Akaydın

et al. 2020

Preprint

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Despite its amazing biodiversity, the Eastern Mediterranean remains a highly understudied region especially when compared to the Western Mediterranean. Scarcity of such studies restrict our understanding of the processes shaping diversity across the entire Mediterranean. To this end we used a combination of molecular markers and presence/absence data from all species of the Eastern Mediterrranean genus Ricotia collected across its full geographic range to determine historical, ecological and evolutionary factors responsible for lineage-specific diversification in this genus. Network analysis based on nuclear ribosomal and chloroplast DNA revealed high genetic structure within all lineages and phylogenetic reconstructions based on the multispecies coalescent showed that within lineage diversification corresponded to the onset of the Mediterranean climate. Reconstruction of ancestral histories indicate the genus originated within Anatolia and slowly spread across the Eastern Mediterranean and Levant using the Taurus mountains. Ecological niche models based on climatic and environmental variables suggest local populations did not go through any major distributional shifts and have persisted in present day habitats since the LGM. Furthermore, niche differentiation tests revealed significant niche differences between closely related species and showed the main variables predicting species limits to be different for each species. Our results give crucial information on the patterns and processes shaping diversity in the Eastern Mediterranean and show the main factor promoting diversification to be local environmental dynamics and ecological specialization and not large scale latitudinal movements as often reported for southern Europe. By determining regional and global patterns of diversification in an eastern Mediterranean genus we further our understanding of the major trends influencing plant diversity in the Mediterranean basin as a whole.

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Out of Transcaucasia: Origin of Western and Central Palearctic populations of Microthlaspi perfoliatum

Cited by 12 publications

References 100 publications

Polyploidy Expands the Range of Centaurium (Gentianaceae)

Polyploidy Expands the Range of Centaurium (Gentianaceae)

Phylogeography and ecological differentiation of strictly Mediterranean taxa: the case of the Iberian endemic Odontites recordonii

Ecological specialization promotes diversity and diversification in the East Mediterranean genusRicotia(Brassicaceae)

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