ArticleChromosome research : an international journal on the molecular, supramolecular and evolutionary aspects of chromosome biology2010
The evolution of CMA bands in Citrus and related genera.
Article in Chromosome research : an international journal on the molecular, supramolecular and evolutionary aspects of chromosome biology, 2010. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 20 papers.
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20 citing papers in PubMed.
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- Heterochromatin and numeric chromosome evolution in Bignoniaceae, with emphasis on the Neotropical clade Tabebuia alliance.Genetics and molecular biology · 2020Article
- Integrated Karyotypes of Diploid and Tetraploid Carrizo Citrange (Frontiers in plant science · 2020Article
- Molecular cytogenetic analysis of genome-specific repetitive elements in Citrus clementina Hort. Ex Tan. and its taxonomic implications.BMC plant biology · 2019Article
- Karyotype Analysis of Diploid and Spontaneously Occurring Tetraploid Blood Orange [Frontiers in plant science · 2019Article
- Karyotype heterogeneity in Philodendron s.l. (Araceae) revealed by chromosome mapping of rDNA loci.PloS one · 2018Article
- Evolutionary dynamics of satellite DNA repeats from Phaseolus beans.Protoplasma · 2017Article
- Centromeric and non-centromeric satellite DNA organisation differs in holocentric Rhynchospora species.Chromosoma · 2017Article
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- Fragile Sites of 'Valencia' Sweet Orange (Citrus sinensis) Chromosomes Are Related with Active 45s rDNA.PloS one · 2016Article
- The striking and unexpected cytogenetic diversity of genus Tanacetum L. (Asteraceae): a cytometric and fluorescent in situ hybridisation study of Iranian taxa.BMC plant biology · 2015Article
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- Hypomethylation of cytosine residues in cold-sensitive regions of Cestrum strigilatum (Solanaceae).Genetics and molecular biology · 2012Article
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- Chromosome homeologies and high variation in heterochromatin distribution between Citrus L. and Poncirus Raf. as evidenced by comparative cytogenetic mapping.Chromosome research : an international journal on the molecular, supramolecular and evolutionary aspects of chromosome biology · 2011Article
- Karyological studies in ten species of Citrus(Linnaeus, 1753) (Rutaceae) of North-East India.Comparative cytogenetics · 2011Article
- Molecular characterization of constitutive heterochromatin in three species of Trypoxylon (Hymenoptera: Crabronidae: Trypoxylini) by CMA3/DAPI staining.Comparative cytogenetics · 2011Article
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Abstract
Most species of Citrus and related genera display a similar karyotype with 2n = 18 and a variable number of terminal heterochromatic blocks positively stained with chromomycin A(3) (CMA(+) bands). Some of these blocks are 45S rDNA sites, whereas others may correspond to the main GC-rich satellite DNA found in several Citrus species. In the present work, the distribution of the 45S rDNA and the main satellite DNA isolated from C. sinensis (CsSat) were investigated by in situ hybridization in seven species of Citrus, two species of closely related genera (Fortunella obovata and Poncirus trifoliata) and four species of the subfamily Aurantioideae, which were less related to Citrus (Atalantia monophylla, Murraya paniculata, Severinia buxifolia, and Triphasia trifolia). In Citrus, Fortunella, and Poncirus, most CMA(+) bands colocalized only with CsSat sites, whereas others colocalized only with rDNA sites. However, some of these species displayed a few CMA(+) bands that colocalized with sites of both probes and other CMA(+) bands that did not colocalized with any of the probes. On the other hand, in the four species less related to Citrus, no CsSat signal was found on chromosomes. On Southern blot, the CsSat probe hybridized with genomic DNA from Citrus, Fortunella, and Poncirus at high stringency only, while under the less stringent conditions, it also hybridized with distantly related species. Therefore, CsSat sequences are the principal component of the heterochromatic blocks of Citrus, Poncirus, and Fortunella, whereas CsSat-like sequences seem to be widespread in the subfamily Aurantioideae. These data further suggest that the variable number of terminal CMA(+) bands observed on chromosomes of Citrus and related genera are probably the consequence of amplification or reduction in the number of CsSat-like sequences distributed on chromosome termini, paralleled by mutation and homogenization events, as proposed by the library hypothesis.
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