author_facet Herklotz, Veit
Kovařík, Aleš
Lunerová, Jana
Lippitsch, Susan
Groth, Marco
Ritz, Christiane M.
Herklotz, Veit
Kovařík, Aleš
Lunerová, Jana
Lippitsch, Susan
Groth, Marco
Ritz, Christiane M.
author Herklotz, Veit
Kovařík, Aleš
Lunerová, Jana
Lippitsch, Susan
Groth, Marco
Ritz, Christiane M.
spellingShingle Herklotz, Veit
Kovařík, Aleš
Lunerová, Jana
Lippitsch, Susan
Groth, Marco
Ritz, Christiane M.
The Plant Journal
The fate of ribosomal RNA genes in spontaneous polyploid dogrose hybrids [Rosa L. sect. Caninae (DC.) Ser.] exhibiting non‐symmetrical meiosis
Cell Biology
Plant Science
Genetics
author_sort herklotz, veit
spelling Herklotz, Veit Kovařík, Aleš Lunerová, Jana Lippitsch, Susan Groth, Marco Ritz, Christiane M. 0960-7412 1365-313X Wiley Cell Biology Plant Science Genetics http://dx.doi.org/10.1111/tpj.13843 <jats:title>Summary</jats:title><jats:p>Dogroses represent an exceptional system for studying the effects of genome doubling and hybridization: their asymmetrical meiosis enables recombination in bi‐parentally inherited chromosomes but prevents it in maternally inherited ones. We employed fluorescent <jats:italic>in situ</jats:italic> hybridization, genome skimming, amplicon sequencing of genomic and cDNA as well as conventional cloning of nuclear ribosomal DNA in two phylogenetically distinct pentaploid (2<jats:italic>n</jats:italic> = <jats:italic>5x</jats:italic> = 35) species, <jats:italic>Rosa canina</jats:italic> and <jats:italic>Rosa inodora</jats:italic>, and their naturally occurring reciprocal hybrids, <jats:italic>Rosa dumalis</jats:italic> (<jats:italic>5x</jats:italic>) and <jats:italic>Rosa agrestis</jats:italic> (<jats:italic>5x, 6x</jats:italic>). Both progenitor species differed in composition, meiotic behaviour and expression of rDNA loci: <jats:italic>R. canina</jats:italic> (five 18S and 5–8 5S loci) was dominated by the Canina ribotypes, but <jats:italic>R. inodora</jats:italic> (four 18S loci and 7–8 5S loci) by the Rubiginosa ribotype. The co‐localized 5S/18S loci occurred on either bivalent‐forming (<jats:italic>R. canina</jats:italic>) or univalent‐forming (<jats:italic>R. inodora</jats:italic>) chromosomes. Ribosomal DNA loci were additively inherited; however, the Canina ribotypes were dominantly expressed, even in genotypes with relatively low copy number of these genes. Moreover, we observed rDNA homogenization towards the paternally transmitted Canina ribotype in <jats:italic>6x R. agrestis</jats:italic>. The here‐observed variation in arrangement and composition of rDNA types between <jats:italic>R. canina</jats:italic> and <jats:italic>R. inodora</jats:italic> suggests the involvement of different genomes in bivalent formation. This results supports the hypothesis that the asymmetrical meiosis arose at least twice by independent ancient hybridization events.</jats:p> The fate of ribosomal <scp>RNA</scp> genes in spontaneous polyploid dogrose hybrids [<i>Rosa</i> L. sect. <i>Caninae</i> (<scp>DC</scp>.) Ser.] exhibiting non‐symmetrical meiosis The Plant Journal
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series The Plant Journal
source_id 49
title The fate of ribosomal RNA genes in spontaneous polyploid dogrose hybrids [Rosa L. sect. Caninae (DC.) Ser.] exhibiting non‐symmetrical meiosis
title_unstemmed The fate of ribosomal RNA genes in spontaneous polyploid dogrose hybrids [Rosa L. sect. Caninae (DC.) Ser.] exhibiting non‐symmetrical meiosis
title_full The fate of ribosomal RNA genes in spontaneous polyploid dogrose hybrids [Rosa L. sect. Caninae (DC.) Ser.] exhibiting non‐symmetrical meiosis
title_fullStr The fate of ribosomal RNA genes in spontaneous polyploid dogrose hybrids [Rosa L. sect. Caninae (DC.) Ser.] exhibiting non‐symmetrical meiosis
title_full_unstemmed The fate of ribosomal RNA genes in spontaneous polyploid dogrose hybrids [Rosa L. sect. Caninae (DC.) Ser.] exhibiting non‐symmetrical meiosis
title_short The fate of ribosomal RNA genes in spontaneous polyploid dogrose hybrids [Rosa L. sect. Caninae (DC.) Ser.] exhibiting non‐symmetrical meiosis
title_sort the fate of ribosomal <scp>rna</scp> genes in spontaneous polyploid dogrose hybrids [<i>rosa</i> l. sect. <i>caninae</i> (<scp>dc</scp>.) ser.] exhibiting non‐symmetrical meiosis
topic Cell Biology
Plant Science
Genetics
url http://dx.doi.org/10.1111/tpj.13843
publishDate 2018
physical 77-90
description <jats:title>Summary</jats:title><jats:p>Dogroses represent an exceptional system for studying the effects of genome doubling and hybridization: their asymmetrical meiosis enables recombination in bi‐parentally inherited chromosomes but prevents it in maternally inherited ones. We employed fluorescent <jats:italic>in situ</jats:italic> hybridization, genome skimming, amplicon sequencing of genomic and cDNA as well as conventional cloning of nuclear ribosomal DNA in two phylogenetically distinct pentaploid (2<jats:italic>n</jats:italic> = <jats:italic>5x</jats:italic> = 35) species, <jats:italic>Rosa canina</jats:italic> and <jats:italic>Rosa inodora</jats:italic>, and their naturally occurring reciprocal hybrids, <jats:italic>Rosa dumalis</jats:italic> (<jats:italic>5x</jats:italic>) and <jats:italic>Rosa agrestis</jats:italic> (<jats:italic>5x, 6x</jats:italic>). Both progenitor species differed in composition, meiotic behaviour and expression of rDNA loci: <jats:italic>R. canina</jats:italic> (five 18S and 5–8 5S loci) was dominated by the Canina ribotypes, but <jats:italic>R. inodora</jats:italic> (four 18S loci and 7–8 5S loci) by the Rubiginosa ribotype. The co‐localized 5S/18S loci occurred on either bivalent‐forming (<jats:italic>R. canina</jats:italic>) or univalent‐forming (<jats:italic>R. inodora</jats:italic>) chromosomes. Ribosomal DNA loci were additively inherited; however, the Canina ribotypes were dominantly expressed, even in genotypes with relatively low copy number of these genes. Moreover, we observed rDNA homogenization towards the paternally transmitted Canina ribotype in <jats:italic>6x R. agrestis</jats:italic>. The here‐observed variation in arrangement and composition of rDNA types between <jats:italic>R. canina</jats:italic> and <jats:italic>R. inodora</jats:italic> suggests the involvement of different genomes in bivalent formation. This results supports the hypothesis that the asymmetrical meiosis arose at least twice by independent ancient hybridization events.</jats:p>
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author Herklotz, Veit, Kovařík, Aleš, Lunerová, Jana, Lippitsch, Susan, Groth, Marco, Ritz, Christiane M.
author_facet Herklotz, Veit, Kovařík, Aleš, Lunerová, Jana, Lippitsch, Susan, Groth, Marco, Ritz, Christiane M., Herklotz, Veit, Kovařík, Aleš, Lunerová, Jana, Lippitsch, Susan, Groth, Marco, Ritz, Christiane M.
author_sort herklotz, veit
container_issue 1
container_start_page 77
container_title The Plant Journal
container_volume 94
description <jats:title>Summary</jats:title><jats:p>Dogroses represent an exceptional system for studying the effects of genome doubling and hybridization: their asymmetrical meiosis enables recombination in bi‐parentally inherited chromosomes but prevents it in maternally inherited ones. We employed fluorescent <jats:italic>in situ</jats:italic> hybridization, genome skimming, amplicon sequencing of genomic and cDNA as well as conventional cloning of nuclear ribosomal DNA in two phylogenetically distinct pentaploid (2<jats:italic>n</jats:italic> = <jats:italic>5x</jats:italic> = 35) species, <jats:italic>Rosa canina</jats:italic> and <jats:italic>Rosa inodora</jats:italic>, and their naturally occurring reciprocal hybrids, <jats:italic>Rosa dumalis</jats:italic> (<jats:italic>5x</jats:italic>) and <jats:italic>Rosa agrestis</jats:italic> (<jats:italic>5x, 6x</jats:italic>). Both progenitor species differed in composition, meiotic behaviour and expression of rDNA loci: <jats:italic>R. canina</jats:italic> (five 18S and 5–8 5S loci) was dominated by the Canina ribotypes, but <jats:italic>R. inodora</jats:italic> (four 18S loci and 7–8 5S loci) by the Rubiginosa ribotype. The co‐localized 5S/18S loci occurred on either bivalent‐forming (<jats:italic>R. canina</jats:italic>) or univalent‐forming (<jats:italic>R. inodora</jats:italic>) chromosomes. Ribosomal DNA loci were additively inherited; however, the Canina ribotypes were dominantly expressed, even in genotypes with relatively low copy number of these genes. Moreover, we observed rDNA homogenization towards the paternally transmitted Canina ribotype in <jats:italic>6x R. agrestis</jats:italic>. The here‐observed variation in arrangement and composition of rDNA types between <jats:italic>R. canina</jats:italic> and <jats:italic>R. inodora</jats:italic> suggests the involvement of different genomes in bivalent formation. This results supports the hypothesis that the asymmetrical meiosis arose at least twice by independent ancient hybridization events.</jats:p>
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spelling Herklotz, Veit Kovařík, Aleš Lunerová, Jana Lippitsch, Susan Groth, Marco Ritz, Christiane M. 0960-7412 1365-313X Wiley Cell Biology Plant Science Genetics http://dx.doi.org/10.1111/tpj.13843 <jats:title>Summary</jats:title><jats:p>Dogroses represent an exceptional system for studying the effects of genome doubling and hybridization: their asymmetrical meiosis enables recombination in bi‐parentally inherited chromosomes but prevents it in maternally inherited ones. We employed fluorescent <jats:italic>in situ</jats:italic> hybridization, genome skimming, amplicon sequencing of genomic and cDNA as well as conventional cloning of nuclear ribosomal DNA in two phylogenetically distinct pentaploid (2<jats:italic>n</jats:italic> = <jats:italic>5x</jats:italic> = 35) species, <jats:italic>Rosa canina</jats:italic> and <jats:italic>Rosa inodora</jats:italic>, and their naturally occurring reciprocal hybrids, <jats:italic>Rosa dumalis</jats:italic> (<jats:italic>5x</jats:italic>) and <jats:italic>Rosa agrestis</jats:italic> (<jats:italic>5x, 6x</jats:italic>). Both progenitor species differed in composition, meiotic behaviour and expression of rDNA loci: <jats:italic>R. canina</jats:italic> (five 18S and 5–8 5S loci) was dominated by the Canina ribotypes, but <jats:italic>R. inodora</jats:italic> (four 18S loci and 7–8 5S loci) by the Rubiginosa ribotype. The co‐localized 5S/18S loci occurred on either bivalent‐forming (<jats:italic>R. canina</jats:italic>) or univalent‐forming (<jats:italic>R. inodora</jats:italic>) chromosomes. Ribosomal DNA loci were additively inherited; however, the Canina ribotypes were dominantly expressed, even in genotypes with relatively low copy number of these genes. Moreover, we observed rDNA homogenization towards the paternally transmitted Canina ribotype in <jats:italic>6x R. agrestis</jats:italic>. The here‐observed variation in arrangement and composition of rDNA types between <jats:italic>R. canina</jats:italic> and <jats:italic>R. inodora</jats:italic> suggests the involvement of different genomes in bivalent formation. This results supports the hypothesis that the asymmetrical meiosis arose at least twice by independent ancient hybridization events.</jats:p> The fate of ribosomal <scp>RNA</scp> genes in spontaneous polyploid dogrose hybrids [<i>Rosa</i> L. sect. <i>Caninae</i> (<scp>DC</scp>.) Ser.] exhibiting non‐symmetrical meiosis The Plant Journal
spellingShingle Herklotz, Veit, Kovařík, Aleš, Lunerová, Jana, Lippitsch, Susan, Groth, Marco, Ritz, Christiane M., The Plant Journal, The fate of ribosomal RNA genes in spontaneous polyploid dogrose hybrids [Rosa L. sect. Caninae (DC.) Ser.] exhibiting non‐symmetrical meiosis, Cell Biology, Plant Science, Genetics
title The fate of ribosomal RNA genes in spontaneous polyploid dogrose hybrids [Rosa L. sect. Caninae (DC.) Ser.] exhibiting non‐symmetrical meiosis
title_full The fate of ribosomal RNA genes in spontaneous polyploid dogrose hybrids [Rosa L. sect. Caninae (DC.) Ser.] exhibiting non‐symmetrical meiosis
title_fullStr The fate of ribosomal RNA genes in spontaneous polyploid dogrose hybrids [Rosa L. sect. Caninae (DC.) Ser.] exhibiting non‐symmetrical meiosis
title_full_unstemmed The fate of ribosomal RNA genes in spontaneous polyploid dogrose hybrids [Rosa L. sect. Caninae (DC.) Ser.] exhibiting non‐symmetrical meiosis
title_short The fate of ribosomal RNA genes in spontaneous polyploid dogrose hybrids [Rosa L. sect. Caninae (DC.) Ser.] exhibiting non‐symmetrical meiosis
title_sort the fate of ribosomal <scp>rna</scp> genes in spontaneous polyploid dogrose hybrids [<i>rosa</i> l. sect. <i>caninae</i> (<scp>dc</scp>.) ser.] exhibiting non‐symmetrical meiosis
title_unstemmed The fate of ribosomal RNA genes in spontaneous polyploid dogrose hybrids [Rosa L. sect. Caninae (DC.) Ser.] exhibiting non‐symmetrical meiosis
topic Cell Biology, Plant Science, Genetics
url http://dx.doi.org/10.1111/tpj.13843