Molecular and morphological revision of the<i>Allium saxatile</i>group (Amaryllidaceae): geographical isolation as the driving force of underestimated speciation

Seregin, Alexey P.; Anačkov, Goran; Friesen, Nikolai

doi:10.1111/boj.12269

Cited by 45 publications

(27 citation statements)

References 55 publications

(90 reference statements)

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“…Section Oreiprason F. Herm: We investigated four species ( A. kirilovii , A. obliquum , A. petraeum , and A. tianschanicum ) from Kyrgyzstan in this section. Seed testa sculpture of A. kirilovii (newly described by Seregin et al [ 11 ]) and A. petraeum were firstly reported. In addition, eight species of this section were studied from China (Xinjiang) by Lin and Tan [ 31 ], and all of them had straight to arched anticlinal walls and periclinal walls with intermediate verrucae or many granules.…”

Section: Discussionmentioning

confidence: 99%

Seed Morphology of Allium L. (Amaryllidaceae) from Central Asian Countries and Its Taxonomic Implications

Baasanmunkh

Lee

Jang

et al. 2020

Plants

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We studied seed macro- and micro-morphological characteristics of 48 Allium species (51 accessions) belonging to 24 sections and 7 subgenera. Our taxonomic sampling focused on the central Asian regions of Uzbekistan, Kyrgyzstan, and Mongolia. The seed length ranged between 1.74 ± 0.16–4.47 ± 0.43 mm and width ranged between 1.06 ± 0.08–3.44 ± 0.23 mm, showing various shapes. The irregular and elongated polygonal testa cells occurred in all investigated species. Seed testa sculptures showed high variation in their anticlinal walls associated with different shapes: straight to with U-, S- or Omega-type undulations among the species. The moderately flat to convex periclinal walls with various sized verrucae or granules were found in all investigated taxa. Based on our research, we conclude that seed characteristics such as size, shape, and the seed testa features show their significant variability, revealing key characteristics to support taxonomic relationships and major clades recovered in the molecular phylogeny of the genus Allium. Especially, the anticlinal wall characteristics were highly variable and decisive at the both section and species levels. In addition, widely varied shapes and sizes of the seeds were remarkably effective to distinguish Allium species.

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Section: Discussionmentioning

confidence: 99%

Seed Morphology of Allium L. (Amaryllidaceae) from Central Asian Countries and Its Taxonomic Implications

Baasanmunkh

Lee

Jang

et al. 2020

Plants

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“…Some recent studies focus on genetic structure of central vs. marginal populations of certain steppe taxa and discuss possible explanations for the observed patterns including colonization histories (Wróblewska, 2008;Wagner et al, 2011;Durka et al, 2013;Hirsch et al, 2015). However, only few studies evaluate historical influences on contemporary genotypic patterns within a phylogeographical framework (Franzke et al, 2004;Hurka et al, 2012;Seregin et al, 2015;Friesen et al, 2016;Kajtoch et al 2016;Meindl et al, 2016). Unfortunately, information on the climate/landscape history of the Eurasian steppe, its origin and evolution, is not only rather scattered throughout the literature but also often centred around the view and problems of a special scientific discipline (e.g., biogeography, biodiversity, climatology, palaeontology).…”

Section: Introductionmentioning

confidence: 99%

The Eurasian steppe belt: Status quo, origin and evolutionary history

2019

Turczaninowia

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We present a comprehensive review of the characteristics and structure of the Eurasian steppe and of its evolutionary history in space and time. During the last decades, tremendous advances in research methods in earth and palaeontological sciences have greatly increased knowledge on palaeoclimates and palaeoenvironments of the Cenozoic era. We discuss well-known facts against the background of the recent progress made in these fields and others related to our topics, and address open questions. In Part I (Status quo), we deal with steppe classification systems, human impact and present state of the Eurasian steppe. Here, we concentrate on prehistoric times when the first human cultures emerged, and on the last 100 to 200 years when drastic changes occurred and in many regions steppe nearly completely disappeared. In Part II (Origin and evolutionary history of the Eurasian steppe) we attend to the origin and evolution of grasses and grassland in general, and to the evolution and climate/landscape history of the Eurasian steppe belt in particular. Uplift of the Himalayan-Tibet Plateau, changes in land-sea distribution and global climate trends have been invoked as driving forces behind Cenozoic paleoclimate changes, but there is little consensus which one is the most important driver. We finally identify gaps/challenges in our knowledge about the evolutionary history of the Eurasian steppe and discuss research directions, which might help to unravel the florogenetic and steppe habitat dynamics from the beginning of steppe formation to the present time.

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“…However, few phylogeographical analyses of Eurasian steppe plants have been undertaken. Some recent studies on Brassicaceae and Allium taxa highlight the importance of such studies for understanding species history in the light of climate/landscape dynamics (Franzke et al, 2004;Hurka et al, 2012;Seregin et al, 2015).…”

Section: Introductionmentioning

confidence: 99%

Dated phylogenies and historical biogeography of Dontostemon and Clausia (Brassicaceae) mirror the palaeogeographical history of the Eurasian steppe

Friesen

German

Hurka

et al. 2015

Journal of Biogeography

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Aim We hypothesize that molecular signals in Eurasian steppe plants reflect their biogeographical history as well as the climate/landscape history of the Eurasian steppe. To test this hypothesis we focus here on the characteristic Eurasian steppe genera Dontostemon and Clausia (Brassicaceae), and have included all presently accepted species in our study. Location Eurasian steppe from eastern Asia to south‐eastern Europe. Methods To elucidate their phylogeny, we sequenced the nuclear ribosomal ITS and chloroplast trnL‐F regions. Sequence data were analysed with parsimony and Bayesian phylogenetic approaches. Divergence times were estimated using BEAST, relying on published ITS substitution rates. Distribution maps of all species of the two genera were compiled, and ancestral areas reconstructed using LAGRANGE. Results Both genera originated in central and eastern Asia, with Clausia later extending its range to eastern Europe. Dated phylogenies revealed: onset of diversification in the lower and middle Miocene; evolution of the majority of groups in the upper Miocene/lower Pliocene, and further speciation events during the Quaternary. Origin and diversification within these genera coincide with the evolution and history of the modern Eurasian steppe. Main conclusions Dated phylogenies and historical biogeography of Clausia and Dontostemon mirror the climate/landscape dynamics of the steppe from its origin in the early Miocene up to the Pleistocene and Holocene.

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Molecular and morphological revision of theAllium saxatilegroup (Amaryllidaceae): geographical isolation as the driving force of underestimated speciation

Cited by 45 publications

References 55 publications

Seed Morphology of Allium L. (Amaryllidaceae) from Central Asian Countries and Its Taxonomic Implications

Seed Morphology of Allium L. (Amaryllidaceae) from Central Asian Countries and Its Taxonomic Implications

The Eurasian steppe belt: Status quo, origin and evolutionary history

Dated phylogenies and historical biogeography of Dontostemon and Clausia (Brassicaceae) mirror the palaeogeographical history of the Eurasian steppe

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