Chromosomal characterization based on repetitive DNA distribution in a tetraploid cytotype of Chrysanthemum zawadskii

Cuyacot, Abigail Rubiato; Lim, Ki-Byung; Kim, Hyun Hee; Hwang, Yoon‐Jung

doi:10.1007/s13580-017-0280-4

Cited by 10 publications

(7 citation statements)

References 45 publications

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“…Our results in addition to previous reports of ITR sites in Asteraceae [8,[32][33][34][35][36][37][38][39][40][41][42][43][44][45][46][47][48][49][50], including the chromosome number, presence and number of ITR signals, and their chromosomal distribution are indicated in Table S1.…”

Section: Patterns Of Itr Variation In Asteraceaesupporting

confidence: 78%

“…For each major lineage (subfamily), the number of sampled tribes, genera and species is indicated; the number of taxa showing ITR sites in parenthesis. Data are from previous reports [8,[32][33][34][35][36][37][38][39][40][41][42][43][44][45][46][47][48][49][50] and our own results. 5 and Table 1.…”

Section: Patterns Of Itr Variation In Asteraceaementioning

confidence: 99%

“…Reports indicating the presence of ITRs in this family are known since the work of [8]. However, the number of taxa analyzed to date remains limited and includes only 53 species (and one subspecies) belonging to 20 genera [8,[32][33][34][35][36][37][38][39][40][41][42][43][44][45][46][47][48][49][50]. Most of the species analyzed to date are restricted to subfamily Asteroideae (Table S1).…”

Section: Introductionmentioning

confidence: 99%

“…In this paper, we assess the presence of ITRs in Asteraceae using a comparatively large sampling scheme compared to previous studies [8,[32][33][34][35][36][37][38][39][40][41][42][43][44][45][46][47][48][49][50]. We aimed to cover a broad phylogenetic range and analyze the available data from an evolutionary perspective.…”

Section: Introductionmentioning

confidence: 99%

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Interstitial Arabidopsis-Type Telomeric Repeats in Asteraceae

Maravilla

Rosato

Álvarez

et al. 2021

Plants

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Tandem repeats of telomeric-like motifs at intra-chromosomal regions, known as interstitial telomeric repeats (ITR), have drawn attention as potential markers of structural changes, which might convey information about evolutionary relationships if preserved through time. Building on our previous work that reported outstanding ITR polymorphisms in the genus Anacyclus, we undertook a survey across 132 Asteraceae species, focusing on the six most speciose subfamilies and considering all the ITR data published to date. The goal was to assess whether the presence, site number, and chromosomal location of ITRs convey any phylogenetic signal. We conducted fluorescent in situ hybridization (FISH) using an Arabidopsis-type telomeric sequence as a probe on karyotypes obtained from mitotic chromosomes. FISH signals of ITR sites were detected in species of subfamilies Asteroideae, Carduoideae, Cichorioideae, Gymnarhenoideae, and Mutisioideae, but not in Barnadesioideae. Although six small subfamilies have not yet been sampled, altogether, our results suggest that the dynamics of ITR formation in Asteraceae cannot accurately trace the complex karyological evolution that occurred since the early diversification of this family. Thus, ITRs do not convey a reliable signal at deep or shallow phylogenetic levels and cannot help to delimitate taxonomic categories, a conclusion that might also hold for other important families such as Fabaceae.

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Section: Patterns Of Itr Variation In Asteraceaesupporting

confidence: 78%

Section: Patterns Of Itr Variation In Asteraceaementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Interstitial Arabidopsis-Type Telomeric Repeats in Asteraceae

Maravilla

Rosato

Álvarez

et al. 2021

Plants

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“…The interstitial localization of 5S rDNA loci could stabilize the tandem repeats, whereas 45S rDNA resides on terminal region are prone to dispersion in the genome during chromosomal rearrangement (Waminal and Kim, 2012;Reddy et al, 2013). The polymorphism of rDNA gene loci and merging of some repeats indicate the occurrence of genomic reorganization during speciation within the Cucurbitaceae family (Datson and Murray, 2006;Książczyk et al, 2010, Cuyacot et al, 2017.…”

Section: Discussionmentioning

confidence: 99%

Karyotypes of Three Exotic Cucurbit Species Based on Triple-Color FISH Analysis

Pellerin,

Waminal,

Belandres

et al. 2018

HST

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Cytogenetic investigations based on chromosome composition provide insight into basic genetic and genomic characteristics of a species that in turn facilitate species identification and breeding programs. Tandem repeats (TRs) like the 45S rDNA, 5S rDNA and telomeric repeats are ubiquitous in nuclear genomes and are good cytogenetic markers for karyotyping. In this study, we analyzed the karyotypes of three exotic cucurbit species, namely Cucumis melo var. flexuosus (L.) Naudin (2n = 24), Melothria pendula L. (2n = 24) and Trichosanthes anguina L. (2n = 22), based on the cytogenetic distribution of the 45S, 5S and Arabidopsis-type telomeric TRs through triple-color fluorescence in situ hybridization. T. anguina had larger chromosomes (3.2-5.4 µm) compared to C. melo var. flexuosus and M. pendula (1.5-2.2 µm and 1.8-2.5 µm). One and two pairs of 5S and 45S rDNA signals were observed in C. melo var. flexuosus, respectively; while M. pendula and T. anguina had four and three pairs of 45S rDNA, respectively, and two pairs of 5S rDNA. Co-localized signals of 5S and 45S rDNA were observed in M. pendula and T. anguina, but not in C. melo var. flexuosus. Telomeric repeats were observed at chromosome ends of all chromosomes. This information will be useful in future cytogenomic and phylogenetic studies facilitating cucurbit breeding programs.

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Identification of 5S and 45S rDNA sites in Chrysanthemum species by using oligonucleotide fluorescence in situ hybridization (Oligo-FISH)

Lin

et al. 2021

Mol Biol Rep

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Chromosomal characterization based on repetitive DNA distribution in a tetraploid cytotype of Chrysanthemum zawadskii

Cited by 10 publications

References 45 publications

Interstitial Arabidopsis-Type Telomeric Repeats in Asteraceae

Interstitial Arabidopsis-Type Telomeric Repeats in Asteraceae

Karyotypes of Three Exotic Cucurbit Species Based on Triple-Color FISH Analysis

Identification of 5S and 45S rDNA sites in Chrysanthemum species by using oligonucleotide fluorescence in situ hybridization (Oligo-FISH)

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