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Phylogeographic and taxonomic considerations on Goniolimon tataricum (Plumbaginaceae) and its relatives from south-eastern Europe and the Apennine Peninsula

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Abstract

Goniolimon species are mainly components of the Eurasian steppe or steppe-like rocky vegetation, with some taxa occurring also in south-eastern Europe and northern Africa. We analysed the variability of: (i) two maternally inherited plastid loci (rpl32-trnL and 3′rps16-5′trnK) in 110 individuals of six currently accepted species from the Balkans and one species from the Apennines, to provide new insights into their origin and evolutionary history; and (ii) quantitative morphological characters (14 independent characters and one ratio character) in 641 individuals of three species of which two are morphologically and ecologically similar (G. italicum and G. tataricum) and the third, G. dalmaticum, was frequently misidentified as G. tataricum in the past, to provide new taxonomic treatment for proposed G. tataricum subspecies. We delineated several quantitative and five qualitative characters studied in a more limited sample as diagnostic for the identification of four subspecies (three newly described and one in a new rank) of G. tataricum. The history of westward peripheral populations of this species in the Balkans and the Apennines was rather complex and driven by local geo-historic events. These events facilitated multiple waves of east–west expansion of lineages originating from sources outside of the Balkan Peninsula which periodically diversified and occupied localised areas in the Balkans during the Pleistocene. An initial spread of an ancient G. tataricum lineage throughout south-eastern Europe probably occurred during the Messinian Salinity Crisis. Inter- and intraspecific hybridisation/introgression, as well as retention of ancestral polymorphisms, was common in G. tataricum and related taxa over time.

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Acknowledgements

The Ministry of Education, Science and Technological Development of the Republic of Serbia supported this research through Grant 173030 “Plant biodiversity of Serbia and the Balkans—assessment, sustainable use and protection”. One of the authors (S. Bogdanović) would like to thank the University of Zagreb through the programme of Academic mobility and Erasmus for partial funding of this research. The authors would like to thank A. Radić for language editing and are grateful to S. Djurović, I. Rešetnik and I. Ljubičić for help in the field.

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Correspondence to Uroš Buzurović.

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Contribution to “Plants of the Balkan Peninsula in Space and Time”

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Online Resource 1. Annotation of rpl32-trnL and 3′rps16-5′trnK plastid intergenic spacers used in the study and delineation of haplotypes detected in studied Goniolimon taxa.

Online Resource 2. Aligned matrix of two plastid intergenic spacers (3′rps16-5′trnK and rpl32-trnL) used in the study.

Online Resource 3. Positions of synapomorphic characters in two plastid regions in studied Goniolimon taxa.

Online Resource 4. a Eigenvalues for two-dimensional PCA by species Goniolimon dalmaticum, G. italicum and G. tataricum s.l. presented in Fig. 5a, b eigenvalues for three-dimensional PCA by species G. italicum and G. tataricum s.l. presented in Fig. 5b, c classification matrix for discriminant analysis by group presented in Fig. 5d, d standardised coefficients for canonical variables of CDA presented in Fig. 5d; characters that mostly contributed to the separation along particular axes are given in bold, e total canonical structure for canonical variables of CDA presented in Fig. 5d.

Online Resource 5. Holotype of Goniolimon tataricum (L.) Boiss. subsp. graecum Buzurović, subsp. nov. deposited in the Herbarium of the University of Belgrade (BEOU).

Online Resource 6. Holotype of Goniolimon tataricum (L.) Boiss. subsp. croaticum Buzurović & Bogdanović, subsp. nov. deposited in the Herbarium of the Natural History Museum in Belgrade (BEO).

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Buzurović, U., Tomović, G., Niketić, M. et al. Phylogeographic and taxonomic considerations on Goniolimon tataricum (Plumbaginaceae) and its relatives from south-eastern Europe and the Apennine Peninsula. Plant Syst Evol 306, 29 (2020). https://doi.org/10.1007/s00606-020-01636-0

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  • DOI: https://doi.org/10.1007/s00606-020-01636-0

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