Genome sizes and phylogenetic relationships suggest recent divergence of closely related species of the Limonium vulgare complex (Plumbaginaceae)

Róis, Ana S.; Castro, Sílvia; Loureiro, João; Sádio, Flávio; Rhazi, Laïla; Guara-Requena, Miguel; Caperta, Ana D.

doi:10.1007/s00606-018-1524-1

Cited by 10 publications

(14 citation statements)

References 56 publications

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“…Plumbaginaceae with nearly 90% of coastal species, and in particular the genus Limonium, are among the bestrepresented taxa of coastal habitats (Kubitzki, 1993;Van der Maarel & Van der MaarelVersluys, 1996). However, Limonium taxonomy is extremely complex given the intricate processes of poly ploidization and hybridization, as well as unusual reproductive strategies (Erben, 1978;Lledó & al., 2005;Róis & al., 2016Róis & al., , 2018. On the coasts of the North Atlantic and Mediterranean, northwest Morocco and northwest France, and in the Channel Islands the genus Limonium is represented by taxa with leaves with parallel or pinnate venation or univeined leaves (Erben, 1993;Lahondère & Biorét, 1996;Fennane & al., 2014).…”

Section: Discussionmentioning

confidence: 99%

“…Differences in holoploid and monoploid genome sizes were explored using generalized linear mixed models. Caperta & al. • Cytogenetics of sexual and asexual Limonium taxa (Erben, 1993;Lledó & al., 2005;Cortinhas & al., 2015;Malekmohammadi & al., 2017;Róis & al., 2018).…”

Section: Discussionmentioning

confidence: 99%

“…(2015). Individual species can be grouped according to leaf venation type (Erben, 1998(Erben, , 1993Stace, 2010) and ploidy level (Erben, 1993;Ingrouille, 1985;Róis & al., 2012Róis & al., , 2018Caperta & al., 2017) (Table 1). Their geographic distribution is given in Table 1 (based on Erben, 1993Erben, , 1999Lahondère & Biorét, 1996;Stace, 2010;Fennane & al., 2014;Cortinhas & al., 2015;Brullo & Erben, 2016;Caperta & al., 2017).…”

Section: Methodsmentioning

confidence: 99%

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Cytogenetic features of sexual and asexual Limonium taxa (Plumbaginaceae)

Caperta

Conceição

Róis

et al. 2018

TAXON

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The genus Limonium (sea lavenders) is characterized by various taxonomically challenging complexes with great karyological diversity, and chromosomes ranging in size from diminutive to large. In this biosystematic study, our goal was to investigate cytogenetic features of twelve sexual and asexual taxa in a particular part of their distribution range. Genome size, chromosome number variation, and other cytological features were investigated in a representative set of sea lavenders with distinct leaf venation, present in the coastal areas of the Iberian Peninsula, Morocco, France, and the Channel Islands. Flow cytometric genome size determinations were made in plants from natural populations. Cell and nuclear areas of epidermal cells, as well as, chromosome numbers and length were measured in plants from ex situ collections. Our findings revealed positive and significant correlations between holoploid genome size and cell size, nuclei area and chromosome total length. Tetraploid taxa with pinnately veined leaves had significant lower holoploid and monoploid genome sizes along with lower cell and nuclei areas and chromosome sizes than tetraploid taxa with parallelveined leaves. The results obtained are discussed in the context of breeding relationships known or suspected among these taxa. In conclusion, our results provide a basis for future evolutionary studies, and support that pollenstigma dimorphisms and genome size allied with chromosome counts might be important taxonomic traits in Limonium in apomictic/sexual groups.

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

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Cytogenetic features of sexual and asexual Limonium taxa (Plumbaginaceae)

Caperta

Conceição

Róis

et al. 2018

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“…Variation of chromosome numbers, ploidy levels, and genome sizes have been frequently analyzed for a better understanding of evolutionary patterns and species relationships in plants [4][5][6][7]. The genome size values, in combination with data on chromosome numbers, allow ploidy levels to be inferred and can also provide insights into evolutionary relationships between closely related taxa in wild plant groups [7][8][9][10][11][12]. While the monocots are known to have the widest range of genome sizes (0.2-152.2 pg/1 C) among angiosperms [13][14][15], the known genome sizes in the family Iridaceae range from 0.5 pg/1 C in Hesperantha and Sisyrinchium species to 31.4 pg/1 C in Moraea taxa [15,16].…”

Section: Introductionmentioning

confidence: 99%

Genome Size and Chromosome Number Evolution in Korean Iris L. Species (Iridaceae Juss.)

Choi

Weiss‐Schneeweiss

Temsch

et al. 2020

Plants

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Chromosome numbers, karyotypes, and genome sizes of 14 Iris L. (Iridaceae Juss.) species in Korea and their closely related taxon, Sisyrinchium rosulatum, are presented and analyzed in a phylogenetic framework. To date, understanding the chromosomal evolution of Korean irises has been hampered by their high chromosome numbers. Here, we report analyses of chromosome numbers and karyotypes obtained via classic Feulgen staining and genome sizes measured using flow cytometry in Korean irises. More than a two-fold variation in chromosome numbers (2n = 22 to 2n = 50) and over a three-fold genome size variation (2.39 pg to 7.86 pg/1 C) suggest the putative polyploid and/or dysploid origin of some taxa. Our study demonstrates that the patterns of genome size variation and chromosome number changes in Korean irises do not correlate with the phylogenetic relationships and could have been affected by different evolutionary processes involving polyploidy or dysploidy. This study presents the first comprehensive chromosomal and genome size data for Korean Iris species. Further studies involving molecular cytogenetic and phylogenomic analyses are needed to interpret the mechanisms involved in the origin of chromosomal variation in the Iris.

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“…Cytogenetic investigations (genomic– and fluorescence in situ hybridization [GISH and FISH]) are powerful tools in verifying the origin of polyploid taxa, as well as the genome dosage of the respective parents (Heslop–Harrison and Schwarzacher, ). Genome size is usually stable within morphologically defined species and often differs even between closely related species (e.g., Bräutigam and Bräutigam, ; Prančl et al., ; Róis et al., ; Zahradníček et al., ). This may help resolving conflicting hypotheses about the origin of polyploids (auto– vs. allopolyploidy) and identifying putative parental combinations in hybridogenous species (e.g., Mahelka et al., ).…”

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confidence: 99%