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RESEARCH PRODUCT
Evolutionary site-number changes of ribosomal DNA loci during speciation: complex scenarios of ancestral and more recent polyploid events.
Juan Carlos Moreno-saizMarcela RosatoJosep A. RossellóJosé A. Galiánsubject
chromosome evolutionPlant ScienceBiology45S rDNAPolyploidyPolyploidFISHMolecular evolution1008CladeEvolutionary dynamicsRibosomal DNAResearch ArticlespolyploidyGenetics1011Phylogenetic treeChromosome evolutionChromosomefood and beverages5S rDNABiología y Biomedicina / Biología1054BrassicaceaerDNA locus evolutionPloidyVellinaedescription
Genes encoding ribosomal RNA are universal key constituents of eukaryotic genomes, but the number of loci varies between species. We assessed the evolutionary trends in site-number changes of rDNA loci during speciation in a lineage of the cabbage family, characterized by complex scenarios of polyploidy. Our results suggest the existence of constrictions to burst loci amplification in the 5S rDNA family in polyploids and an overall trend to further reduce their number. The 45S rDNA site change in polyploids tells a different story, implying loci amplification in most of the polyploid entities.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2015-07-23 | AoB PLANTS |