ArticleMolecular genetics and genomics : MGG2016
Molecular cytogenetic analysis and genomic organization of major DNA repeats in castor bean (Ricinus communis L.).
Article in Molecular genetics and genomics : MGG, 2016. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 4 papers.
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Who cites it
4 citing papers in PubMed.
- qPCR as a Selective Tool for Cytogenetics.Plants (Basel, Switzerland) · 2022Article
- Study and Physical Mapping of the Species-Specific Tandem Repeat CS-237 Linked with 45S Ribosomal DNA Intergenic Spacer inPlants (Basel, Switzerland) · 2022Article
- Intraspecific DNA methylation polymorphism in the non-edible oilseed plant castor bean.Plant diversity · 2017Article
- Satellite DNA and Transposable Elements in Seabuckthorn (Hippophae rhamnoides), a Dioecious Plant with Small Y and Large X Chromosomes.Genome biology and evolution · 2017Article
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Authors and funding
2 authors.
Funding
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Abstract
This article addresses the bioinformatic, molecular genetic, and cytogenetic study of castor bean (Ricinus communis, 2n = 20), which belongs to the monotypic Ricinus genus within the Euphorbiaceae family. Because castor bean chromosomes are small, karyotypic studies are difficult. However, the use of DNA repeats has yielded new prospects for karyotypic research and genome characterization. In the present study, major DNA repeat sequences were identified, characterized and localized on mitotic metaphase and meiotic pachytene chromosomes. Analyses of the nucleotide composition, curvature models, and FISH localization of the rcsat39 repeat suggest that this repeat plays a key role in building heterochromatic arrays in castor bean. Additionally, the rcsat390 sequences were determined to be chromosome-specific repeats located in the pericentromeric region of mitotic chromosome A (pachytene chromosome 1). The localization of rcsat39, rcsat390, 45S and 5S rDNA genes allowed for the development of cytogenetic landmarks for chromosome identification. General questions linked to heterochromatin formation, DNA repeat distribution, and the evolutionary emergence of the genome are discussed. The article may be of interest to biologists studying small genome organization and short monomer DNA repeats.
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