Ribosomal DNA distribution and a genus‐wide phylogeny reveal patterns of chromosomal evolution in Alstroemeria (Alstroemeriaceae)

Chacón, Juliana; Sousa, Aretuza; Baeza, Carlos M.; Renner, Susanne S.

doi:10.3732/ajb.1200104

Cited by 37 publications

(20 citation statements)

References 70 publications

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“…F 1 with the synteny relationship of 5S and 45S is different from E genome with the nonsynteny relationship, providing more visual evidence of the further establishment of F genome. Besides, the 5S and 45S rDNA at telomere ends in F 1 are close to each other, which is rare in Gossypium species though it has been reported in other plants [43–45], suggesting it may relate to the stabilization of centromeric fission products [45,46]. …”

Section: Discussionmentioning

confidence: 98%

“…By comparing the number and distribution characteristics of rDNA sites on the chromosomes among species, interspecific phylogenetic relationships and the related mechanism of speciation and chromosomal evolution could be revealed [6]. Recently, the physical FISH location of rDNA in plants have provided much information to the evolutional relationship of many close species and the origin of allopolyploid [7–12]. …”

Section: Introductionmentioning

confidence: 99%

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Chromosomal Locations of 5S and 45S rDNA in Gossypium Genus and Its Phylogenetic Implications Revealed by FISH

et al. 2013

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We investigated the locations of 5S and 45S rDNA in Gossypium diploid A, B, D, E, F, G genomes and tetraploid genome (AD) using multi-probe fluorescent in situ hybridization (FISH) for evolution analysis in Gossypium genus. The rDNA numbers and sizes, and synteny relationships between 5S and 45S were revealed using 5S and 45S as double-probe for all species, and the rDNA-bearing chromosomes were identified for A, D and AD genomes with one more probe that is single-chromosome-specific BAC clone from G. hirsutum (A1D1). Two to four 45S and one 5S loci were found in diploid-species except two 5S loci in G . incanum (E4), the same as that in tetraploid species. The 45S on the 7th and 9th chromosomes and the 5S on the 9th chromosomes seemed to be conserved in A, D and AD genomes. In the species of B, E, F and G genomes, the rDNA numbers, sizes, and synteny relationships were first reported in this paper. The rDNA pattern agrees with previously reported phylogenetic history with some disagreements. Combined with the whole-genome sequencing data from G . raimondii (D5) and the conserved cotton karyotype, it is suggested that the expansion, decrease and transposition of rDNA other than chromosome rearrangements might occur during the Gossypium evolution.

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Section: Discussionmentioning

confidence: 98%

Section: Introductionmentioning

confidence: 99%

Chromosomal Locations of 5S and 45S rDNA in Gossypium Genus and Its Phylogenetic Implications Revealed by FISH

et al. 2013

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“…Despite the apparently invariable chromosome morphology, studies using molecular cytogenetic techniques suggest a dynamic picture of chromosome restructuring in Pyrhocactus A.Berger (Las Peñas et al ., ). The mobility and distribution patterns of rDNA genes can therefore be used as species‐specific karyotype markers (Hasterok et al ., ; Chacón et al ., ). Interpreting changes in the number and location of rDNA loci in related species in a phylogenetic framework can be a powerful approach to enable a clearer understanding of the mechanisms and directions of chromosomal changes and their impact on plant evolution (Lim et al ., ; Clarkson et al ., ; Weiss‐Schneeweiss et al ., ).…”

Section: Introductionmentioning

confidence: 97%

Molecular cytogenetic insights into the evolution of the epiphytic genusLepismium(Cactaceae) and related genera

et al. 2015

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Changes in chromosome structure and number play an important role in plant evolution. This was investigated in the Neotropical epiphytic cacti: all Lepismium spp. and some related Rhipsalis spp. Both genera have species with disjunct distributions between the paranas of south-eastern Brazil and north-eastern Argentina and the yungas forests of the eastern Andes. Karyotypes, fluorescent banding and fluorescence in situ hybridization (FISH) studies using rDNA probes were performed. A time-calibrated phylogenetic tree was generated to place the karyological information and biogeographical history in an explicit evolutionary context. All species were 2n = 22 and showed symmetrical karyotypes comprising only metacentric chromosomes of similar sizes. The heterochromatin bands were always associated with chromosome satellites coinciding with the location and number of the 18S-5.8S-26S rDNA loci. The 5S rDNA loci had more heterogeneous profiles with one or two loci per haploid genome. Phylogenetic analysis suggested an ancient duplication event of the 5S rDNA loci and more recent post-speciation translocation and deletion events. These genome restructurings are estimated to have occurred approximately 13.98 Mya in the middle Miocene, after Lepismium and Rhipsalis diverged. The ancestor of Lepismium may have had a similar karyotype to L. lumbricoides and the Rhipsalis spp. (i.e. one 5S locus on chromosome 2). Both genera hypothetically originated in the yungas (north-eastern Argentina and southern Bolivia), but diversification of the Lepismium crown group probably originated from populations with duplicated 5S loci in the parana forests of south-eastern Brazil (8.70 Mya in the late Miocene). Two migration events between the yungas and parana forests were suggested to explain the extant distribution of Lepismium spp. These results make Lepismium a model system for the study of the complex chromosomal evolution in plants.

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“…Physical mapping of the 5S and 45S rDNA by fluorescence in situ hybridization (FISH) can provide valuable information on the interrelationships of closely related species [Adams et al, 2000;Ran et al, 2001;Shan et al, 2003;Weiss-Schneeweiss et al, 2008;Fukushima et al, 2011;Lan and Albert, 2011;Chacón et al, 2012;Li et al, 2016]. To date, the distribution of 5S and 45S rDNA loci has only been reported in C. sativus and C. melo of the genus Cucumis [Han et al, 2008;Liu et al, 2010].…”

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confidence: 99%

Divergence between C. melo and African Cucumis Species Identified by Chromosome Painting and rDNA Distribution Pattern

Wang²,

Wang³

et al. 2016

Cytogenet Genome Res

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The 5S and 45S rDNA sites are useful chromosome landmarks and can provide valuable information about karyotype evolution and species interrelationships. In this study, we employed fluorescence in situ hybridization (FISH) to determine the number and chromosomal location of 5S and 45S rDNA loci in 8 diploid Cucumis species. Two oligonucleotide painting probes specific for the rDNA-bearing chromosomes in C. melo were hybridized to other Cucumis species in order to investigate the homeologies among the rDNA-carrying chromosomes in Cucumis species. The analyzed diploid species showed 3 types of rDNA distribution patterns, which provided clear cytogenetic evidence on the divergence between C. melo and wild diploid African Cucumis species. The present results not only show species interrelationships in the genus Cucumis, but the rDNA FISH patterns can also be used as cytological markers for the discrimination of closely related species. The data will be helpful for breeders to choose the most suitable species from various wild species for improvement of cultivated melon.

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Ribosomal DNA distribution and a genus‐wide phylogeny reveal patterns of chromosomal evolution in Alstroemeria (Alstroemeriaceae)

Cited by 37 publications

References 70 publications

Chromosomal Locations of 5S and 45S rDNA in Gossypium Genus and Its Phylogenetic Implications Revealed by FISH

Chromosomal Locations of 5S and 45S rDNA in Gossypium Genus and Its Phylogenetic Implications Revealed by FISH

Molecular cytogenetic insights into the evolution of the epiphytic genusLepismium(Cactaceae) and related genera

Divergence between<b><i> C. melo</i></b> and African <b><i>Cucumis</i></b> Species Identified by Chromosome Painting and rDNA Distribution Pattern

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