Rapid Elimination of Low-Copy DNA Sequences in Polyploid Wheat: A Possible Mechanism for Differentiation of Homoeologous Chromosomes
Identifieur interne : 000C62 ( Ncbi/Merge ); précédent : 000C61; suivant : 000C63Rapid Elimination of Low-Copy DNA Sequences in Polyploid Wheat: A Possible Mechanism for Differentiation of Homoeologous Chromosomes
Auteurs : M. Feldman ; B. Liu ; G. Segal ; S. Abbo ; A. A. Levy ; J. M. VegaSource :
- Genetics [ 0016-6731 ] ; 1997.
Abstract
To study genome evolution in allopolyploid plants, we analyzed polyploid wheats and their diploid progenitors for the occurrence of 16 low-copy chromosome- or genome-specific sequences isolated from hexaploid wheat. Based on their occurrence in the diploid species, we classified the sequences into two groups: group I, found in only one of the three diploid progenitors of hexaploid wheat, and group II, found in all three diploid progenitors. The absence of group II sequences from one genome of tetraploid wheat and from two genomes of hexaploid wheat indicates their specific elimination from these genomes at the polyploid level. Analysis of a newly synthesized amphiploid, having a genomic constitution analogous to that of hexaploid wheat, revealed a pattern of sequence elimination similar to the one found in hexaploid wheat. Apparently, speciation through allopolyploidy is accompanied by a rapid, nonrandom elimination of specific, low-copy, probably noncoding DNA sequences at the early stages of allopolyploidization, resulting in further divergence of homoeologous chromosomes (partially homologous chromosomes of different genomes carrying the same order of gene loci). We suggest that such genomic changes may provide the physical basis for the diploid-like meiotic behavior of polyploid wheat.
Url:
PubMed: 9383078
PubMed Central: 1208259
Links toward previous steps (curation, corpus...)
- to stream Pmc, to step Corpus: 000162
- to stream Pmc, to step Curation: 000162
- to stream Pmc, to step Checkpoint: 000376
Links to Exploration step
PMC:1208259Le document en format XML
<record><TEI><teiHeader><fileDesc><titleStmt><title xml:lang="en">Rapid Elimination of Low-Copy DNA Sequences in Polyploid Wheat: A Possible Mechanism for Differentiation of Homoeologous Chromosomes</title><author><name sortKey="Feldman, M" sort="Feldman, M" uniqKey="Feldman M" first="M." last="Feldman">M. Feldman</name></author><author><name sortKey="Liu, B" sort="Liu, B" uniqKey="Liu B" first="B." last="Liu">B. Liu</name></author><author><name sortKey="Segal, G" sort="Segal, G" uniqKey="Segal G" first="G." last="Segal">G. Segal</name></author><author><name sortKey="Abbo, S" sort="Abbo, S" uniqKey="Abbo S" first="S." last="Abbo">S. Abbo</name></author><author><name sortKey="Levy, A A" sort="Levy, A A" uniqKey="Levy A" first="A. A." last="Levy">A. A. Levy</name></author><author><name sortKey="Vega, J M" sort="Vega, J M" uniqKey="Vega J" first="J. M." last="Vega">J. M. Vega</name></author></titleStmt><publicationStmt><idno type="wicri:source">PMC</idno><idno type="pmid">9383078</idno><idno type="pmc">1208259</idno><idno type="url">http://www.ncbi.nlm.nih.gov/pmc/articles/PMC1208259</idno><idno type="RBID">PMC:1208259</idno><date when="1997">1997</date><idno type="wicri:Area/Pmc/Corpus">000162</idno><idno type="wicri:explorRef" wicri:stream="Pmc" wicri:step="Corpus" wicri:corpus="PMC">000162</idno><idno type="wicri:Area/Pmc/Curation">000162</idno><idno type="wicri:explorRef" wicri:stream="Pmc" wicri:step="Curation">000162</idno><idno type="wicri:Area/Pmc/Checkpoint">000376</idno><idno type="wicri:explorRef" wicri:stream="Pmc" wicri:step="Checkpoint">000376</idno><idno type="wicri:Area/Ncbi/Merge">000C62</idno></publicationStmt><sourceDesc><biblStruct><analytic><title xml:lang="en" level="a" type="main">Rapid Elimination of Low-Copy DNA Sequences in Polyploid Wheat: A Possible Mechanism for Differentiation of Homoeologous Chromosomes</title><author><name sortKey="Feldman, M" sort="Feldman, M" uniqKey="Feldman M" first="M." last="Feldman">M. Feldman</name></author><author><name sortKey="Liu, B" sort="Liu, B" uniqKey="Liu B" first="B." last="Liu">B. Liu</name></author><author><name sortKey="Segal, G" sort="Segal, G" uniqKey="Segal G" first="G." last="Segal">G. Segal</name></author><author><name sortKey="Abbo, S" sort="Abbo, S" uniqKey="Abbo S" first="S." last="Abbo">S. Abbo</name></author><author><name sortKey="Levy, A A" sort="Levy, A A" uniqKey="Levy A" first="A. A." last="Levy">A. A. Levy</name></author><author><name sortKey="Vega, J M" sort="Vega, J M" uniqKey="Vega J" first="J. M." last="Vega">J. M. Vega</name></author></analytic><series><title level="j">Genetics</title><idno type="ISSN">0016-6731</idno><imprint><date when="1997">1997</date></imprint></series></biblStruct></sourceDesc></fileDesc><profileDesc><textClass></textClass></profileDesc></teiHeader><front><div type="abstract" xml:lang="en"><p>To study genome evolution in allopolyploid plants, we analyzed polyploid wheats and their diploid progenitors for the occurrence of 16 low-copy chromosome- or genome-specific sequences isolated from hexaploid wheat. Based on their occurrence in the diploid species, we classified the sequences into two groups: group I, found in only one of the three diploid progenitors of hexaploid wheat, and group II, found in all three diploid progenitors. The absence of group II sequences from one genome of tetraploid wheat and from two genomes of hexaploid wheat indicates their specific elimination from these genomes at the polyploid level. Analysis of a newly synthesized amphiploid, having a genomic constitution analogous to that of hexaploid wheat, revealed a pattern of sequence elimination similar to the one found in hexaploid wheat. Apparently, speciation through allopolyploidy is accompanied by a rapid, nonrandom elimination of specific, low-copy, probably noncoding DNA sequences at the early stages of allopolyploidization, resulting in further divergence of homoeologous chromosomes (partially homologous chromosomes of different genomes carrying the same order of gene loci). We suggest that such genomic changes may provide the physical basis for the diploid-like meiotic behavior of polyploid wheat.</p></div></front></TEI><pmc article-type="research-article"><pmc-comment>The publisher of this article does not allow downloading of the full text in XML form.</pmc-comment>
<front><journal-meta><journal-id journal-id-type="nlm-ta">Genetics</journal-id><journal-title>Genetics</journal-title><issn pub-type="ppub">0016-6731</issn></journal-meta><article-meta><article-id pub-id-type="pmid">9383078</article-id><article-id pub-id-type="pmc">1208259</article-id><article-id pub-id-type="publisher-id">14731381</article-id><article-categories><subj-group subj-group-type="heading"><subject>Investigations</subject></subj-group></article-categories><title-group><article-title>Rapid Elimination of Low-Copy DNA Sequences in Polyploid Wheat: A Possible Mechanism for Differentiation of Homoeologous Chromosomes</article-title></title-group><contrib-group><contrib contrib-type="author"><name><surname>Feldman</surname><given-names>M.</given-names></name></contrib><contrib contrib-type="author"><name><surname>Liu</surname><given-names>B.</given-names></name></contrib><contrib contrib-type="author"><name><surname>Segal</surname><given-names>G.</given-names></name></contrib><contrib contrib-type="author"><name><surname>Abbo</surname><given-names>S.</given-names></name></contrib><contrib contrib-type="author"><name><surname>Levy</surname><given-names>A. A.</given-names></name></contrib><contrib contrib-type="author"><name><surname>Vega</surname><given-names>J. M.</given-names></name></contrib><aff>Department of Plant Genetics, The Weizmann Institute of Science, Rehovot 76100, Israel</aff></contrib-group><pub-date pub-type="ppub"><month>11</month><year>1997</year></pub-date><volume>147</volume><issue>3</issue><fpage>1381</fpage><lpage>1387</lpage><abstract><p>To study genome evolution in allopolyploid plants, we analyzed polyploid wheats and their diploid progenitors for the occurrence of 16 low-copy chromosome- or genome-specific sequences isolated from hexaploid wheat. Based on their occurrence in the diploid species, we classified the sequences into two groups: group I, found in only one of the three diploid progenitors of hexaploid wheat, and group II, found in all three diploid progenitors. The absence of group II sequences from one genome of tetraploid wheat and from two genomes of hexaploid wheat indicates their specific elimination from these genomes at the polyploid level. Analysis of a newly synthesized amphiploid, having a genomic constitution analogous to that of hexaploid wheat, revealed a pattern of sequence elimination similar to the one found in hexaploid wheat. Apparently, speciation through allopolyploidy is accompanied by a rapid, nonrandom elimination of specific, low-copy, probably noncoding DNA sequences at the early stages of allopolyploidization, resulting in further divergence of homoeologous chromosomes (partially homologous chromosomes of different genomes carrying the same order of gene loci). We suggest that such genomic changes may provide the physical basis for the diploid-like meiotic behavior of polyploid wheat.</p></abstract></article-meta></front></pmc><affiliations><list></list><tree><noCountry><name sortKey="Abbo, S" sort="Abbo, S" uniqKey="Abbo S" first="S." last="Abbo">S. Abbo</name><name sortKey="Feldman, M" sort="Feldman, M" uniqKey="Feldman M" first="M." last="Feldman">M. Feldman</name><name sortKey="Levy, A A" sort="Levy, A A" uniqKey="Levy A" first="A. A." last="Levy">A. A. Levy</name><name sortKey="Liu, B" sort="Liu, B" uniqKey="Liu B" first="B." last="Liu">B. Liu</name><name sortKey="Segal, G" sort="Segal, G" uniqKey="Segal G" first="G." last="Segal">G. Segal</name><name sortKey="Vega, J M" sort="Vega, J M" uniqKey="Vega J" first="J. M." last="Vega">J. M. Vega</name></noCountry></tree></affiliations></record>Pour manipuler ce document sous Unix (Dilib)
EXPLOR_STEP=$WICRI_ROOT/Wicri/Terre/explor/ThuliumV1/Data/Ncbi/Merge
HfdSelect -h $EXPLOR_STEP/biblio.hfd -nk 000C62 | SxmlIndent | more
Ou
HfdSelect -h $EXPLOR_AREA/Data/Ncbi/Merge/biblio.hfd -nk 000C62 | SxmlIndent | more
Pour mettre un lien sur cette page dans le réseau Wicri
{{Explor lien
|wiki= Wicri/Terre
|area= ThuliumV1
|flux= Ncbi
|étape= Merge
|type= RBID
|clé= PMC:1208259
|texte= Rapid Elimination of Low-Copy DNA Sequences in Polyploid Wheat: A Possible Mechanism for Differentiation of Homoeologous Chromosomes
}}
Pour générer des pages wiki
HfdIndexSelect -h $EXPLOR_AREA/Data/Ncbi/Merge/RBID.i -Sk "pubmed:9383078" \
| HfdSelect -Kh $EXPLOR_AREA/Data/Ncbi/Merge/biblio.hfd \
| NlmPubMed2Wicri -a ThuliumV1
| This area was generated with Dilib version V0.6.21. |  |