Evolutional dynamics of 45S and 5S ribosomal DNA in ancient allohexaploid Atropa belladonna
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- 作者：Roman A. Volkov ; Irina I. Panchuk ; Nikolai V. Borisjuk…
- 关键词：Ribosomal DNA ; Concerted evolution ; Homogenization ; Polyploidy ; Solanaceae
- 刊名：BMC Plant Biology
- 出版年：2017
- 出版时间：December 2017
- 年：2017
- 卷：17
- 期：1
- 全文大小：2059KB
- 刊物主题：Plant Sciences; Agriculture; Tree Biology;
- 出版者：BioMed Central
- ISSN：1471-2229
- 卷排序：17
文摘
BackgroundPolyploid hybrids represent a rich natural resource to study molecular evolution of plant genes and genomes. Here, we applied a combination of karyological and molecular methods to investigate chromosomal structure, molecular organization and evolution of ribosomal DNA (rDNA) in nightshade, Atropa belladonna (fam. Solanaceae), one of the oldest known allohexaploids among flowering plants. Because of their abundance and specific molecular organization (evolutionarily conserved coding regions linked to variable intergenic spacers, IGS), 45S and 5S rDNA are widely used in plant taxonomic and evolutionary studies.