Genome size and karyotype diversity in Solanum sect. Acanthophora (Solanaceae)

Chiarini, Franco Ezequiel; Santiñaque, Federico F.; Urdampilleta, Juan Domingo; Peñas, M. Laura Las

doi:10.1007/s00606-013-0864-0

Cited by 19 publications

(22 citation statements)

References 64 publications

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“…Solanum chenopodioides, S. palitans, and S. pilcomayense showed exclusive bands associated with NORs; the same pattern was found by Melo et al (2011) in a population of S. nigrum. On the other hand, we found telomeric bands not associated with NORs in S. aloysiifolium, S. americanum, S. hastatilobum, S. triflorum, and S. salicifolium as previously reported in different in Solanum (Li et al 2006;Brasileiro-Vidal et al 2009;Rego et al 2009;Melo et al 2011;Chiarini et al 2014). In the Morelloid clade, this was previously detected in four species Jiang et al 2011;Melo et al 2011) including S. americanum studied here.…”

Section: Discussioncontrasting

confidence: 52%

“…Vaio et al 2005;Urdampilleta et al 2006;Roa & Guerra 2012). It was found in several Solanaceae including Capsicum (Moscone et al 2007), Nicotiana (Lim et al 2000), Nierembergia (Acosta & Moscone 2010), Cestrum (Fregonezi et al 2006), and Solanum Melo et al 2011;Chiarini et al 2014). The presence of one chromosome pair with 18-5.8-26S loci seems to be the most frequent case relloid clade seems to be more homogeneous than the Dulcamaroid one with respect to heterochromatin and rDNA patterns.…”

Section: Discussionmentioning

confidence: 86%

“…Acosta et al (2012) detected one intercalary CMA + /DAPI − band in in nearly 50 species of the genus (e.g. Pijnacker & Ferwerda 1984;Pringle & Murray 1993;Sultana & Alam 2007;Brasileiro-Vidal et al 2009;Rego et al 2009;Melo et al 2011;Acosta et al 2012;Miguel et al 2012;Chiarini et al 2014).…”

Section: Discussionmentioning

confidence: 99%

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Heterochromatin and rDNA patterns in Solanum species of the Morelloid and Dulcamaroid clades (Solanaceae)

Moyetta

Urdampilleta

Chiarini

et al. 2016

Plant Biosystems - An International Journal Dealing with all As

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The heterochromatin distribution and the position of 18-5.8-26S, and 5S rDNA loci were determined in 13 species of Solanum of the Morelloid and Dulcamaroid clades. The CMA/DAPI staining and FISH were employed. Two types of constitutive heterochromatin were determined: CMA + /DAPI − associated to NOR and CMA + /DAPI − distributed as terminal bands. In the Morelloid clade, CMA + /DAPI − bands were found in five species while in the Dulcamaroid clade, only S. angustifidum presented this feature. In the Morelloid clade, two to four 18-5.8-26S rDNA loci occupied terminal positions and two rDNA 5S loci were found with variable positions (terminal, intercalary, and centromeric). In the Dulcamaroid clade, two terminal 18-5.8-26S rDNA loci were detected with the exception of S. salicifolium which possessed four such loci and two to four 5S rDNA loci. Solanum crispum is the only species possessing the 5S in synteny with 18-5.8-26S rDNA loci. Karyotype features chromosome banding pattern as well as the location of ribosomal genes which varied among the species, reflecting the chromosome differentiation and evolutionary divergence. The findings obtained contributed to the development of tools that can be used for establishing chromosomic homeologies among species and hence to clarify their taxonomic relationships.

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Section: Discussioncontrasting

confidence: 52%

Section: Discussionmentioning

confidence: 86%

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Heterochromatin and rDNA patterns in Solanum species of the Morelloid and Dulcamaroid clades (Solanaceae)

Moyetta

Urdampilleta

Chiarini

et al. 2016

Plant Biosystems - An International Journal Dealing with all As

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“…The studied species have comparatively low CMA+/DAPIÀ heterochromatin amount exhibited at the satellites (terminal) and some intercalary bands. Heterochromatin type GC-rich loci are coincident with 45S ones and therefore NOR-associated, as observed in most Solanaceae species studied so far Miguel et al 2012;Scaldaferro et al 2013;Chiarini et al 2014). It is known that in most plant species, ribosomal DNA is rather GC-rich (Roa & Guerra 2012).…”

Section: Karyotype Changes and Chromosomal Evolutionmentioning

confidence: 74%

“…; Chiarini et al . ). It is known that in most plant species, ribosomal DNA is rather GC‐rich (Roa & Guerra ).…”

Section: Discussionmentioning

confidence: 97%

Using chromosomal data in the phylogenetic and molecular dating framework: karyotype evolution and diversification in Nierembergia (Solanaceae) influenced by historical changes in sea level

2016

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Karyotype data within a phylogenetic framework and molecular dating were used to examine chromosome evolution in Nierembergia and to infer how geological or climatic processes have influenced in the diversification of this solanaceous genus native to South America and Mexico. Despite the numerous studies comparing karyotype features across species, including the use of molecular phylogenies, to date relatively few studies have used formal comparative methods to elucidate chromosomal evolution, especially to reconstruct the whole ancestral karyotypes. Here, we mapped on the Nierembergia phylogeny one complete set of chromosomal data obtained by conventional staining, AgNOR-, C- and fluorescent chromosome banding, and fluorescent in situ hybridisation. In addition, we used a Bayesian molecular relaxed clock to estimate divergence times between species. Nierembergia showed two major divergent clades: a mountainous species group with symmetrical karyotypes, large chromosomes, only one nucleolar organising region (NOR) and without centromeric heterochromatin, and a lowland species group with asymmetrical karyotypes, small chromosomes, two chromosomes pairs with NORs and centromeric heterochromatin bands. Molecular dating on the DNA phylogeny revealed that both groups diverged during Late Miocene, when Atlantic marine ingressions, called the 'Paranense Sea', probably forced the ancestors of these species to find refuge in unflooded areas for about 2 Myr. This split agrees with an increased asymmetry and heterochromatin amount, and decrease in karyotype length and chromosome size. Thus, when the two Nierembergia ancestral lineages were isolated, major divergences occurred in chromosomal evolution, and then each lineage underwent speciation separately, with relatively minor changes in chromosomal characteristics.

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Chromosome evolution in the cosmopolitan genus Lycium (Solanaceae)

Stiefkens

Peñas

Levin

et al. 2020

TAXON

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Lycium is the only member of tribe Lycieae (Solanoideae, Solanaceae), and it has a cosmopolitan distribution with its greatest diversity in southern South America, southern Africa, and southwestern North America. To date, there has been no attempt to synthesize and evaluate the significance of the available cytogenetical data from a phylogenetic perspective, which is the objective of this study. Firstly, new data on 27 taxa from all its range of distribution (FISH in all of them, banding in 23, Feulgen technique in 14) were provided to fill gaps in the information. The chromosome numbers of L. australe, L. humile, and L. repens were recorded for the first time. Species showed x = 12 with different ploidy levels (mostly diploid or tetraploid), small chromosomes, and symmetrical karyotypes. Lycium fremontii and L. repens were outstanding for having the highest numbers reported for the genus: 10x and 11x, respectively. North American species showed comparatively longer chromosomes. Secondly, cytogenetical traits were mapped on a phylogenetic tree, using character mapping and ancestral states reconstruction, to understand the dynamics of the evolutionary changes. The main cytotaxonomical features were included: chromosome number, presence of polyploidy, total length of the haploid chromosome set, mean chromosome length, karyotype formula, A 1 and A 2 asymmetry indices, percentage of heterochromatin, number of CMA + /DAPI − NORs bands, and number and position of 5S and 18S-5.8S-26S sites. The mean chromosome length, total haploid chromosome length, number of 18S-5.8S-26S loci, number of CMA + /DAPI − NORs bands underwent comparatively few transitions compared with the ploidy level and number of 5S loci. The mapping of the characters on the phylogenetic tree showed that the most probable ancestral chromosome number was 2n = 24 with several independent polyploidization events and one pair of each rDNA locus. The most likely ancestral condition for the genus would be: diploid, with small chromosomes, scarce heterochromatin, asynteny of rDNA loci, and one pair of both 18S-5.8S-26S and 5S loci.

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Genome size and karyotype diversity in Solanum sect. Acanthophora (Solanaceae)

Cited by 19 publications

References 64 publications

Heterochromatin and rDNA patterns in Solanum species of the Morelloid and Dulcamaroid clades (Solanaceae)

Heterochromatin and rDNA patterns in Solanum species of the Morelloid and Dulcamaroid clades (Solanaceae)

Using chromosomal data in the phylogenetic and molecular dating framework: karyotype evolution and diversification in Nierembergia (Solanaceae) influenced by historical changes in sea level

Chromosome evolution in the cosmopolitan genus Lycium (Solanaceae)

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