Formation and Expression of Pseudogenes on the B Chromosome of Rye
| Autor: | Karla Meier, Andreas Houben, Raheleh Karimi-Ashtiyani, Ali Mohammad Banaei-Moghaddam |
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| Rok vydání: | 2013 |
| Předmět: |
Secale
DNA Plant Sequence analysis Pseudogene Molecular Sequence Data Plant Science Biology Genome Chromosomes Plant Evolution Molecular chemistry.chemical_compound Species Specificity Gene Expression Regulation Plant Phylogenetics Sequence Homology Nucleic Acid Gene Research Articles In Situ Hybridization Fluorescence Phylogeny Genetics B chromosome Base Sequence Reverse Transcriptase Polymerase Chain Reaction Chromosome Mapping food and beverages Cell Biology biology.organism_classification chemistry Genome Plant Pseudogenes DNA |
| Zdroj: | The Plant Cell. 25:2536-2544 |
| ISSN: | 1532-298X 1040-4651 |
| DOI: | 10.1105/tpc.113.111856 |
| Popis: | B chromosomes (Bs) are dispensable components of the genomes of numerous species. In contrast with the prevalent view that Bs do not harbor genes, our recent sequence analysis revealed that Bs of rye (Secale cereale) are rich in gene-derived sequences. We compared these gene-like fragments of the rye B with their ancestral A-located counterparts and confirmed an A chromosomal origin and the pseudogenization of B-located gene-like fragments. About 15% of the pseudogene-like fragments on Bs are transcribed in a tissue-type and genotype-specific manner. In addition, B-located sequences can cause in trans down- or upregulation of A chromosome-encoded genic fragments. Phenotypes and effects associated with the presence of Bs might be explained by the activity of B-located pseudogenes. We propose a model for the evolution of B-located pseudogenes. |
| Databáze: | OpenAIRE |
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