B chromosomes of Aegilops speltoides are enriched in organelle genome-derived sequences

Alevtina Ruban, Jörg Fuchs, André Marques, Veit Schubert, Alexander Soloviev, Olga Raskina, Ekaterina Badaeva, Andreas Houben

Research output: Contribution to journalArticlepeer-review


B chromosomes (Bs) are dispensable components of the genome exhibiting non-Mendelian inheritance. Chromosome counts and flow cytometric analysis of the grass species Aegilops speltoides revealed a tissue-type specific distribution of the roughly 570 Mbp large B chromosomes. To address the question whether organelle-to-nucleus DNA transfer is a mechanism that drives the evolution of Bs, in situ hybridization was performed with labelled organellar DNA. The observed B-specific accumulation of chloroplast- and mitochondria-derived sequences suggests a reduced selection against the insertion of organellar DNA in supernumerary chromosomes. The distribution of B-localised organellar-derived sequences and other sequences differs between genotypes of different geographical origins.

Original languageEnglish
Article numbere90214
JournalPLoS ONE
Issue number2
StatePublished - 26 Feb 2014

ASJC Scopus subject areas

  • General Biochemistry, Genetics and Molecular Biology
  • General Agricultural and Biological Sciences
  • General


Dive into the research topics of 'B chromosomes of Aegilops speltoides are enriched in organelle genome-derived sequences'. Together they form a unique fingerprint.

Cite this