&lt;p&gt;&lt;strong&gt;Overlooked morphological variation and a proposal for a new taxonomic circumscription&lt;em&gt; &lt;/em&gt;of &lt;em&gt;Alyssum simplex&lt;/em&gt; (Brassicaceae)&lt;/strong&gt;&lt;/p&gt;

Cetlová, Veronika; Aguilar, Javier Fuertes; Iudova, Daria; Španiel, Stanislav

doi:10.11646/phytotaxa.416.2.3

Cited by 4 publications

(5 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…We did not observe ploidy level variation within populations or within species. The diploids and tetraploids that were traditionally classified within A. simplex were recently split into two separate species, A. simplex (diploids) and A. collinum (tetraploids), which was substantiated by preliminary molecular data, by differences in the monoploid genome size, and some morphological traits (Cetlová et al, 2019). Indeed, the here presented phylogenetic analyses placed these two species in two distinct clades.…”

Section: Multiple Allopolyploid Speciation Events Increased the Species Diversity Across The Whole Distribution Rangesupporting

confidence: 56%

Multiple Drivers of High Species Diversity and Endemism Among Alyssum Annuals in the Mediterranean: The Evolutionary Significance of the Aegean Hotspot

et al. 2021

Self Cite

View full text Add to dashboard Cite

The Mediterranean Basin is a significant hotspot of species diversity and endemism, with various distribution patterns and speciation mechanisms observed in its flora. High species diversity in the Mediterranean is also manifested in the monophyletic lineage of Alyssum annuals (Brassicaceae), but little is known about its origin. These species include both diploids and polyploids that grow mainly in open and disturbed sites across a wide elevational span and show contrasting distribution patterns, ranging from broadly distributed Eurasian species to narrow island endemics. Here, we investigated the evolution of European representatives of this lineage, and aimed to reconstruct their phylogeny, polyploid and genome size evolution using flow cytometric analyses, chloroplast and nuclear high- and low-copy DNA markers. The origin and early diversification of the studied Alyssum lineage could be dated back to the Late Miocene/Pliocene and were likely promoted by the onset of the Mediterranean climate, whereas most of the extant species originated during the Pleistocene. The Aegean region represents a significant diversity center, as it hosts 12 out of 16 recognized European species and comprises several (sub)endemics placed in distinct phylogenetic clades. Because several species, including the closest relatives, occur here sympatrically without apparent niche differences, we can reject simple allopatric speciation via vicariance as well as ecological speciation for most cases. Instead, we suggest scenarios of more complex speciation processes that involved repeated range shifts in response to sea-level changes and recurrent land connections and disconnections since the Pliocene. In addition, multiple polyploidization events significantly contributed to species diversity across the entire distribution range. All seven polyploids, representing both widespread species and endemics to the western or eastern Mediterranean, were inferred to be allopolyploids. Finally, the current distribution patterns have likely been affected also by the human factor (farming and grazing). This study illustrates the complexity of evolutionary and speciation processes in the Mediterranean flora.

show abstract

Section: Multiple Allopolyploid Speciation Events Increased the Species Diversity Across The Whole Distribution Rangesupporting

confidence: 56%

Multiple Drivers of High Species Diversity and Endemism Among Alyssum Annuals in the Mediterranean: The Evolutionary Significance of the Aegean Hotspot

et al. 2021

Self Cite

View full text Add to dashboard Cite

show abstract

“…Values of morphological characters of almost all other taxa except A. alyssoides and A. granatense , were taken from previous studies (Zozomová-Lihová & al. 2014; Cetlová & al. 2019) .…”

Section: Methodsmentioning

confidence: 99%

“…2014; Španiel & al. 2015; Cetlová & al. 2019), seven species of Alyssum have been reported so far from the Pyrenees and adjacent regions.…”

Section: Introductionmentioning

confidence: 99%

An unexpected occurrence of Alyssum rossetii (Brassicaceae) in the Pyrenees, a new species for the Spanish flora

Španiel,

Mártonfiová,

Zozomová-Lihová

2024

Willdenowia

View full text Add to dashboard Cite

Alyssum rossetii is recorded for the first time in Spain from a single locality in the Pyrenees. After the type locality in the Valpelline valley (Pennine Alps, Italy), it is only the second known locality of this species. Morphology, diploid chromosome number (2n = 16), relative genome size, and ITS sequences confirm that the Pyrenean plants are conspecific with the Alpine ones and should be classified as A. rossetii. Phylogenetic analyses placed A. rossetii within the clade of A. sect. Gamosepalum comprising species from Turkey and demonstrated that A. rossetii is only distantly related to other Alyssum species occurring in the Pyrenees and adjacent regions:

show abstract

“…Also the monoploid genome size of A. collinum is clearly intermediate between these two species (Figure 7C and Table 2). The distribution of A. collinum remains poorly understood because it has only recently been taxonomically segregated from the widespread Mediterranean diploid A. simplex (Cetlová et al, 2019). The occurrence of A. collinum is so far confirmed only from the western Mediterranean (Cetlová et al, 2019, and the present samples), and no records exist from eastern Europe.…”

Section: Multiple Allopolyploid Speciation Events Increased the Species Diversity Across The Whole Distribution Rangementioning

confidence: 61%

“…The distribution of A. collinum remains poorly understood because it has only recently been taxonomically segregated from the widespread Mediterranean diploid A. simplex (Cetlová et al, 2019). The occurrence of A. collinum is so far confirmed only from the western Mediterranean (Cetlová et al, 2019, and the present samples), and no records exist from eastern Europe. Some tetraploid individuals (under the name A. simplex) were reported from Iran and Tajikistan (see Table 2), but it is unclear if they could be conspecific with A. collinum or represent autotetraploids of A. simplex, or even another species.…”

Section: Multiple Allopolyploid Speciation Events Increased the Species Diversity Across The Whole Distribution Rangementioning

confidence: 61%

Table_1.XLSX

View full text Add to dashboard Cite

<p><strong>Overlooked morphological variation and a proposal for a new taxonomic circumscription<em> </em>of <em>Alyssum simplex</em> (Brassicaceae)</strong></p>

Cited by 4 publications

References 0 publications

Multiple Drivers of High Species Diversity and Endemism Among Alyssum Annuals in the Mediterranean: The Evolutionary Significance of the Aegean Hotspot

Multiple Drivers of High Species Diversity and Endemism Among Alyssum Annuals in the Mediterranean: The Evolutionary Significance of the Aegean Hotspot

An unexpected occurrence of Alyssum rossetii (Brassicaceae) in the Pyrenees, a new species for the Spanish flora

Table_1.XLSX

Contact Info

Product

Resources

About