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

doi:10.1371/journal.pone.0090214

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

Institute of Evolution

University of Haifa

Research output: Contribution to journal › Article › peer-review

Abstract

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 language	American English
Article number	e90214
Journal	PLoS ONE
Volume	9
Issue number	2
DOIs	https://doi.org/10.1371/journal.pone.0090214
State	Published - 26 Feb 2014

All Science Journal Classification (ASJC) codes

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

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abstract = "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.",

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AU - Ruban, Alevtina

AU - Fuchs, Jörg

AU - Marques, André

AU - Schubert, Veit

AU - Soloviev, Alexander

AU - Raskina, Olga

AU - Badaeva, Ekaterina

AU - Houben, Andreas

PY - 2014/2/26

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AB - 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.

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

Abstract

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