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The rpl23 gene and pseudogene are hotspots of illegitimate recombination in barley chloroplast mutator seedlings

Abstract
Previously, through a TILLING (Targeting Induced Local Lesions in Genomes) approach applied on barley chloroplast mutator (cpm) seedlings a high frequency of polymorphisms in the rpl23 gene was detected. All the polymorphisms corresponded to five differences already known to exist in nature between the rpl23 gene located in the inverted repeats (IRs) and the rpl23 pseudogene located in the large single copy region (LSC). In this investigation, [ver mas...]
Previously, through a TILLING (Targeting Induced Local Lesions in Genomes) approach applied on barley chloroplast mutator (cpm) seedlings a high frequency of polymorphisms in the rpl23 gene was detected. All the polymorphisms corresponded to five differences already known to exist in nature between the rpl23 gene located in the inverted repeats (IRs) and the rpl23 pseudogene located in the large single copy region (LSC). In this investigation, polymorphisms in the rpl23 gene were verified and besides, a similar situation was found for the pseudogene in cpm seedlings. On the other hand, no polymorphisms were found in any of those loci in 40 wild type barley seedlings. Those facts and the independent occurrence of polymorphisms in the gene and pseudogene in individual seedlings suggest that the detected polymorphisms initially arose from gene conversion between gene and pseudogene. Moreover, an additional recombination process involving small recombinant segments seems to occur between the two gene copies as a consequence of their location in the IRs. These and previous results support the hypothesis that t [Cerrar]
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Author
Lencina, Franco;   Landau, Alejandra Mabel;   Petterson, Maria Elizabeth;   Pacheco, Maria Gabriela;   Kobayashi, K.;   Prina, Alberto Raul;  
Fuente
Scientific report 9 (1) : 9960. (10 July 2019)
Date
2019-07
Editorial
Nature Publishing Group
ISSN
2045-2322
URI
https://www.nature.com/articles/s41598-019-46321-6
http://hdl.handle.net/20.500.12123/6293
DOI
https://doi.org/10.1038/s41598-019-46321-6
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