Detection of mPing mobilization in transgenic rice plants.
Genes Genomics
; 42(1): 47-54, 2020 01.
Article
en En
| MEDLINE
| ID: mdl-31721104
ABSTRACT
BACKGROUND:
Various kinds of transposable elements (TEs) constitute high proportions of eukaryotic genomes. Although most of these TEs are not actively mobile, genome stress can induce mobilization of dormant TEs. Transgenic plants undergo tissue culture and subsequent whole-plant regeneration, which can cause genomic stress and in turn induce mobilization of inactive TEs.OBJECTIVES:
To investigate the activation of transposable elements on the genome wide of the GM plant.METHODS:
Transposon activities were analyzed in three transgenic rice plants carrying the insect resistance gene Cry1Ac and an herbicide resistance gene by the transposon display technique. These three transgenic plants were derived from a leading Korean rice variety, Illmi.RESULTS:
We detected seven mobile activities in the mPing element, which is a MITE family transposon. The identity of the novel fragments in the gel display was confirmed by checking TAA target site duplication via sequence analysis. The genomic integration sites were all on different chromosomes, and the integrations were specific to either one or two T1 transgenic lines, except for one common integration on chromosome 4. One integration was in the 5'-UTR of the Glycerol-3-phosphate acyltransferase 8 gene, two integrations were in introns of expressed genes, and the other four integrations were in intergenic regions.CONCLUSION:
Thus, novel mobilization of dormant TEs occurs in transgenic plants, which must be considered in the generation of genetically modified crops (GM crops).Palabras clave
Texto completo:
1
Colección:
01-internacional
Base de datos:
MEDLINE
Asunto principal:
Oryza
/
Elementos Transponibles de ADN
/
Plantas Modificadas Genéticamente
/
Genes de Plantas
/
Genoma de Planta
/
Cromosomas de las Plantas
Tipo de estudio:
Diagnostic_studies
Idioma:
En
Revista:
Genes Genomics
Año:
2020
Tipo del documento:
Article