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Statements

Subject Item
n2:RIV%2F67985939%3A_____%2F12%3A00436262%21RIV15-GA0-67985939
rdf:type
n8:Vysledek skos:Concept
dcterms:description
The present study examines chromosome and genome size evolution in Luzula (woodrush; Juncaceae), a monocot genus with holocentric chromosomes. Detailed karyotypes and genome size estimates were obtained for seven Luzula spp., and these were combined with additional data from the literature to enable a comprehensive cytological analysis of the genus. So that the direction of karyotype and genome size changes could be determined, the cytological data were superimposed onto a phylogenetic tree based on the trnL-F and internal transcribed spacer (ITS) DNA regions. Overall, Luzula shows considerable cytological variation both in terms of chromosome number (2n?=?666) and genome size (15-fold variation; 2C?=?0.568.51?pg; 547.78322.8?Mb). In addition, there is considerable diversity in the genomic mechanisms responsible, with the range of karyotypes arising via agmatoploidy (chromosome fission), symploidy (chromosome fusion) and/or polyploidy accompanied, in some cases, by the amplification or elimination of DNA. Viewed in an evolutionary framework, no broad trend in karyotype or genome evolution was apparent across the genus; instead, different mechanisms of karyotype evolution appear to be operating in different clades. It is clear that Luzula exhibits considerable genomic flexibility and tolerance to large, genome-scale changes The present study examines chromosome and genome size evolution in Luzula (woodrush; Juncaceae), a monocot genus with holocentric chromosomes. Detailed karyotypes and genome size estimates were obtained for seven Luzula spp., and these were combined with additional data from the literature to enable a comprehensive cytological analysis of the genus. So that the direction of karyotype and genome size changes could be determined, the cytological data were superimposed onto a phylogenetic tree based on the trnL-F and internal transcribed spacer (ITS) DNA regions. Overall, Luzula shows considerable cytological variation both in terms of chromosome number (2n?=?666) and genome size (15-fold variation; 2C?=?0.568.51?pg; 547.78322.8?Mb). In addition, there is considerable diversity in the genomic mechanisms responsible, with the range of karyotypes arising via agmatoploidy (chromosome fission), symploidy (chromosome fusion) and/or polyploidy accompanied, in some cases, by the amplification or elimination of DNA. Viewed in an evolutionary framework, no broad trend in karyotype or genome evolution was apparent across the genus; instead, different mechanisms of karyotype evolution appear to be operating in different clades. It is clear that Luzula exhibits considerable genomic flexibility and tolerance to large, genome-scale changes
dcterms:title
Chromosome and genome size variation in Luzula (Juncaceae), a genus with holocentric chromosomes Chromosome and genome size variation in Luzula (Juncaceae), a genus with holocentric chromosomes
skos:prefLabel
Chromosome and genome size variation in Luzula (Juncaceae), a genus with holocentric chromosomes Chromosome and genome size variation in Luzula (Juncaceae), a genus with holocentric chromosomes
skos:notation
RIV/67985939:_____/12:00436262!RIV15-GA0-67985939
n3:aktivita
n11:P n11:I
n3:aktivity
I, P(GP206/07/P147)
n3:cisloPeriodika
4
n3:dodaniDat
n9:2015
n3:domaciTvurceVysledku
n15:8727570
n3:druhVysledku
n12:J
n3:duvernostUdaju
n13:S
n3:entitaPredkladatele
n16:predkladatel
n3:idSjednocenehoVysledku
127126
n3:idVysledku
RIV/67985939:_____/12:00436262
n3:jazykVysledku
n17:eng
n3:klicovaSlova
chromosomal evolution; endopolyploidy; holokinetic chromosome; karyotype evolution; tetraploides; centromeres; TRNF intergenic spacer
n3:klicoveSlovo
n10:tetraploides n10:endopolyploidy n10:karyotype%20evolution n10:TRNF%20intergenic%20spacer n10:holokinetic%20chromosome n10:centromeres n10:chromosomal%20evolution
n3:kodStatuVydavatele
GB - Spojené království Velké Británie a Severního Irska
n3:kontrolniKodProRIV
[C0F8BEC36007]
n3:nazevZdroje
Botanical Journal of the Linnean Society
n3:obor
n18:EF
n3:pocetDomacichTvurcuVysledku
1
n3:pocetTvurcuVysledku
5
n3:projekt
n14:GP206%2F07%2FP147
n3:rokUplatneniVysledku
n9:2012
n3:svazekPeriodika
170
n3:tvurceVysledku
Boček, M. Leitch, I. J. Leitch, A. R. Záveská Drábková, Lenka Kuta, E.
n3:wos
000311243700004
s:issn
0024-4074
s:numberOfPages
13
n6:doi
10.1111/j.1095-8339.2012.01314.x