About: Transcription activity of rRNA genes correlates with a tendency towards intergenomic homogenization in Nicotiana allotetraploids

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An Entity of Type : http://linked.opendata.cz/ontology/domain/vavai/Vysledek, within Data Space : linked.opendata.cz associated with source document(s)

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rdf:type	skos:Concept http://linked.opendata.cz/ontology/domain/vavai/Vysledek
Description	V této práci jsme analyzovali transkripci rodičovských genů pro ribosomální RNA v přirozených a syntetických hybridech allopolyploidech Nicotiana. Zjistili jsme, že umlčování genové exprese nastává jen v hybridech obsahujících určitou kombinaci rodičovských allel rDNA. Umlčování korelovalo s retencí nehomogenizovaných rodičovských genů v allopolyploidním jádře. Postulovali jsme hypotézu, že transkripční aktivita může predisponovat vzdálené genetické lokusy k homogenizaci. (cs) In this work we have analyzed expression of parental ribosomal RNA genes in natural and synthetic Nicotiana allopolyploids. We found that uniparental gene silencing occurs only in lines containing specific combination of parental rDNA alleles. Silencing correlated with the long-term persistance of unhomogenized rDNA units in allopolyploid nucleus. We raised a hypothesis that transcription activity may stimulate unlinked homologous genes towards homogenization. In this work we have analyzed expression of parental ribosomal RNA genes in natural and synthetic Nicotiana allopolyploids. We found that uniparental gene silencing occurs only in lines containing specific combination of parental rDNA alleles. Silencing correlated with the long-term persistance of unhomogenized rDNA units in allopolyploid nucleus. We raised a hypothesis that transcription activity may stimulate unlinked homologous genes towards homogenization. (en)
Title	Transcription activity of rRNA genes correlates with a tendency towards intergenomic homogenization in Nicotiana allotetraploids Transkripční aktivita ribosomálních RNA genů koreluje s jejich intergenomickou homogenizací v allotetraploidních rostlinách rodu Nicotiana (cs) Transcription activity of rRNA genes correlates with a tendency towards intergenomic homogenization in Nicotiana allotetraploids (en)
skos:prefLabel	Transcription activity of rRNA genes correlates with a tendency towards intergenomic homogenization in Nicotiana allotetraploids Transkripční aktivita ribosomálních RNA genů koreluje s jejich intergenomickou homogenizací v allotetraploidních rostlinách rodu Nicotiana (cs) Transcription activity of rRNA genes correlates with a tendency towards intergenomic homogenization in Nicotiana allotetraploids (en)
skos:notation	RIV/68081707:_____/07:00081636!RIV07-AV0-68081707
http://linked.open.../vavai/riv/strany	658;668
http://linked.open...avai/riv/aktivita	P Z
http://linked.open...avai/riv/aktivity	P(GA204/05/0687), P(GA521/07/0116), P(GD204/05/H505), P(LC06004), Z(AV0Z50040507)
http://linked.open...iv/cisloPeriodika	3
http://linked.open...vai/riv/dodaniDat	2007
http://linked.open...aciTvurceVysledku	Matyášek, Roman Kovařík, Aleš Dadejová, Martina Součková, Kamila
http://linked.open.../riv/druhVysledku	J - Článek v odborném periodiku
http://linked.open...iv/duvernostUdaju	S - Úplné a pravdivé údaje nepodléhající ochraně podle zvláštních právních předpisů
http://linked.open...titaPredkladatele	Biofyzikální ústav AV ČR, v. v. i.
http://linked.open...dnocenehoVysledku	455508
http://linked.open...ai/riv/idVysledku	RIV/68081707:_____/07:00081636
http://linked.open...riv/jazykVysledku	eng - angličtina
http://linked.open.../riv/klicovaSlova	allopolyploidy; transcriptional silencing; rDNA (en)
http://linked.open.../riv/klicoveSlovo	rDNA allopolyploidy transcriptional silencing
http://linked.open...odStatuVydavatele	GB - Spojené království Velké Británie a Severního Irska
http://linked.open...ontrolniKodProRIV	[48F4251A4EB8]
http://linked.open...i/riv/nazevZdroje	New Phytologist
http://linked.open...in/vavai/riv/obor	BO
http://linked.open...ichTvurcuVysledku	4 (xsd:int)
http://linked.open...cetTvurcuVysledku	7 (xsd:int)
http://linked.open...vavai/riv/projekt	Integration of research activities to study the plant genome Dynamics of repetitive DNA sequences in polyploid genomes Developmental and evolutionary genetics of plants The impacts of interspecific hybridization and allotetraploidization on evolution of plant genomes
http://linked.open...UplatneniVysledku	2007
http://linked.open...v/svazekPeriodika	174
http://linked.open...iv/tvurceVysledku	Kovařík, Aleš Matyášek, Roman Grandbastien, M.-A. Lim, K. Y. Leitch, A. Dadejová, Martina Součková-Skalická, Kamila
http://linked.open...n/vavai/riv/zamer	Biophysics of dynamic structures and functions of biological systems
issn	0028-646X
number of pages	11 (xsd:int)

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