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001-es BibID:	BIBFORM091933
035-os BibID:	(WoS)000465983800005 (Scopus)85062452291
Első szerző:	Sramkó Gábor (biológus)
Cím:	Evolutionary history of the Pasque-flowers (Pulsatilla, Ranunculaceae) : Molecular phylogenetics, systematics and rDNA evolution / Sramkó Gábor, Laczkó Levente, Volkova Polina A., Bateman Richard M., Mlinarec Jelena
Dátum:	2019
ISSN:	1055-7903
Megjegyzések:	Pulsatilla (Anemoneae, Ranunculaceae) is sister to Anemone s.s. and contains ca 40 perennial species of considerable horticultural and medical importance. We sequenced 31 of those species, plus nine subspecies, two cultivars and six outgroups, for two nuclear regions (high-copy nrITS and low-copy MLH1) and three plastid regions (rbcL, accD?psaI, trnL intron) in order to generate the first comprehensive species-level phylogeny of the genus. Phylogenetic trees were constructed using both concatenation-based (maximum likelihood and Bayesian inference) and coalescence methods. The better supported among the internal nodes were subjected to molecular clock dating and ancestral area reconstruction, and karyotypic characters identified by us using Fluorescence In Situ Hybridization were mapped across the tree. The preferred species tree from the coalescence analysis formed the basis of a new infrageneric classification based on monophyly plus degree of divergence. The earliest divergent of the three subgenera, Kostyczewianae, is represented by only a single species that is morphologically intermediate between Anemone s.s. and ♭core' Pulsatilla. Subgenus Pulsatilla is considerably richer in species than its sister subgenus Preonanthus and contains three monophyletic sections. Species possessing nodding flowers and pectinately dissected leaves are phylogenetically derived compared with groups possessing erect flowers and palmately lobed leaves. Pulsatilla separated from Anemone s.s. at ca 25?Ma. Our results indicate a central Asian mountain origin of the genus and an initial diversification correlated with late Tertiary global cooling plus regional mountain uplift, aridification and consequent expansion of grasslands. The more rapid and extensive diversification within subgenus Pulsatilla began at ca 3?Ma and continued throughout the Quaternary, driven not only by major perturbations in global climate but also by well-documented polyploidy.
Tárgyszavak:	Természettudományok Biológiai tudományok idegen nyelvű folyóiratközlemény külföldi lapban folyóiratcikk
Megjelenés:	Molecular Phylogenetics And Evolution. - 135 (2019), p. 45-61. -
További szerzők:	Laczkó Levente (1992-) (biológus) Volkova, Polina A. Bateman, Richard M. Mlinarec, Jelena
Pályázati támogatás:	PD109686 OTKA
Internet cím:	Szerző által megadott URL DOI Intézményi repozitóriumban (DEA) tárolt változat
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001-es BibID:	BIBFORM082713
035-os BibID:	(WoS)000503880300015 (Scopus)85073582914
Első szerző:	Sramkó Gábor (biológus)
Cím:	Iterative allogamy-autogamy transitions drive actual and incipient speciation during the ongoing evolutionary radiation within the orchid genus Epipactis (Orchidaceae) / Gábor Sramkó, Ovidiu Paun, Marie K. Brandrud, Levente Laczkó, Attila Molnár V., Richard M. Bateman
Dátum:	2019
ISSN:	0305-7364 1095-8290
Megjegyzések:	Background and Aims The terrestrial orchid genus Epipactis has become a model system for the study of speciation via transitions from allogamy to autogamy, but close phylogenetic relationships have proven difficult to resolve through Sanger sequencing. Methods We analysed with restriction site-associated sequencing (RAD-seq) 108 plants representing 29 named taxa that together span the genus, focusing on section Epipactis. Our filtered matrix of 12 543 single nucleotide polymorphisms was used to generate an unrooted network and a rooted, well-supported likelihood tree. We further inferred genetic structure through a co-ancestry heat map and admixture analysis, and estimated inbreeding coefficients per sample. Key Results The 27 named taxa of the ingroup were resolved as 11 genuine, geographically widespread species: four dominantly allogamous and seven dominantly autogamous. A single comparatively allogamous species, E. helleborine, is the direct ancestor of most of the remaining species, though one of the derived autogams has generated one further autogamous species. An assessment of shared ancestry suggested only sporadic hybridization between the re-circumscribed species. Taxa with the greatest inclination towards autogamy show less, if any, admixture, whereas the gene pools of more allogamous species contain a mixture alleles found in the autogams. Conclusions This clade is presently undergoing an evolutionary radiation driven by a wide spectrum of genotypic, phenotypic and environmental factors. Epipactis helleborine has also frequently generated many local variants showing inclinations toward autogamy (and occasionally cleistogamy), best viewed as incipient speciation from within the genetic background provided by E. helleborine, which thus becomes an example of a convincingly paraphyletic species. Autogams are often as widespread and ecologically successful as allogams.
Tárgyszavak:	Természettudományok Biológiai tudományok idegen nyelvű folyóiratközlemény külföldi lapban folyóiratcikk Admixture autogamy evolutionary dead-end evolutionary radiation phylogeography paraphyly phylogenomics RAD-seq speciation
Megjelenés:	Annals Of Botany. - 124 : 3 (2019), p. 481-497. -
További szerzők:	Paun, Ovidiu Brandrud, Marie K. Laczkó Levente (1992-) (biológus) Molnár V. Attila (1969-) (biológus, botanikus) Bateman, Richard M.
Pályázati támogatás:	OTKA PD109686 OTKA
Internet cím:	Szerző által megadott URL DOI Intézményi repozitóriumban (DEA) tárolt változat
Borító:
Saját polcon: