Journal ArticleDOI
Non-Random Distribution of 5S rDNA Sites and Its Association with 45S rDNA in Plant Chromosomes.
Fernando Roa,Marcelo Guerra +1 more
TLDR
The high frequency of genera with at least 1 species with adjacent 5S and 45S sites reveals that this association appeared several times during angiosperm evolution, but it has been maintained only rarely as the dominant array in plant genera.Abstract:
5S and 45S rDNA sites are the best mapped chromosome regions in eukaryotic chromosomes. In this work, a database was built gathering information about the position and number of 5S rDNA sites in 784 plant species, aiming to identify patterns of distribution along the chromosomes and its correlation with the position of 45S rDNA sites. Data revealed that in most karyotypes (54.5%, including polyploids) two 5S rDNA sites (a single pair) are present, with 58.7% of all sites occurring in the short arm, mainly in the proximal region. In karyotypes of angiosperms with only 1 pair of sites (single sites) they are mostly found in the proximal region (52.0%), whereas in karyotypes with multiple sites the location varies according to the average chromosome size. Karyotypes with multiple sites and small chromosomes ( 6 µm) more commonly show terminal or interstitial sites. In species with holokinetic chromosomes, the modal value of sites per karyotype was also 2, but they were found mainly in a terminal position. Adjacent 5S and 45S rDNA sites were often found in the short arm, reflecting the preferential distribution of both sites in this arm. The high frequency of genera with at least 1 species with adjacent 5S and 45S sites reveals that this association appeared several times during angiosperm evolution, but it has been maintained only rarely as the dominant array in plant genera.read more
Citations
More filters
Journal ArticleDOI
Evolutionary trends in animal ribosomal DNA loci: introduction to a new online database.
TL;DR: No significant correlation between the number of 5S and 45S rDNA loci was observed, suggesting that their distribution and amplification across the chromosomes follow independent evolutionary trajectories.
Journal ArticleDOI
Cytogenetic features of rRNA genes across land plants: analysis of the Plant rDNA database.
TL;DR: The analyses presented summarise current knowledge on rDNA locus numbers and distribution in plants and found a non-terminal position of 35S rDNA was found in about 25% of single-locus karyotypes, suggesting that terminal locations are not essential for functionality and expression.
Journal ArticleDOI
Molecular and cytogenetic evidence for an allotetraploid origin of Chenopodium quinoa and C. berlandieri (Amaranthaceae)
Bozena Kolano,Jamie McCann,Maja Orzechowska,Dorota Siwinska,Eva M. Temsch,Hanna Weiss-Schneeweiss +5 more
TL;DR: The phylogenetic analyses confirmed allotetraploid origin of both tetraploids involving diploids of two different genomic groups and suggested that these two might share very similar parentage.
Journal ArticleDOI
Heterochromatic and cytomolecular diversification in the Caesalpinia group (Leguminosae): relationships between phylogenetic and cytogeographical data.
Brena Van-Lume,Tiago Esposito,José Alexandre Felizola Diniz-Filho,Edeline Gagnon,Gwilym P. Lewis,Gustavo Souza +5 more
TL;DR: The authors' analyses support some shared effects of the environment, when integrated with phylogeny and geography, on the CMA/DAPI variability, and suggest CMA+ heterochromatin is highly dynamic and its amplification/deamplification might be non-random, generating similar karyotypes in species which are not sister taxa in the molecular phylogeny but which co-occur in similar environments.
Journal ArticleDOI
Chromosome number reduction in the sister clade of Carica papaya with concomitant genome size doubling
TL;DR: On the basis of outgroup comparison, 2n = 18 is the ancestral number, and repeated chromosomal fusions with simultaneous genome size increase as a result of repetitive elements accumulating near centromeres characterize the papaya clade.
References
More filters
R Development Core Team (2010): R: A language and environment for statistical computing
TL;DR: In this article, the R Foundation for Statistical Computing (RFC) gave permission to make and distribute verbatim copies of this manual provided the copyright notice and this permission notice are preserved on all copies.
Journal ArticleDOI
The Sorghum bicolor genome and the diversification of grasses
Andrew H. Paterson,John E. Bowers,Rémy Bruggmann,Inna Dubchak,Jane Grimwood,Heidrun Gundlach,Georg Haberer,Uffe Hellsten,Therese Mitros,Alexander Poliakov,Jeremy Schmutz,Manuel Spannagl,Haibao Tang,Xiyin Wang,Xiyin Wang,Thomas Wicker,Arvind K. Bharti,Jarrod Chapman,F. Alex Feltus,F. Alex Feltus,Udo Gowik,Igor V. Grigoriev,Eric Lyons,Christopher G. Maher,Mihaela Martis,Apurva Narechania,Robert Otillar,Bryan W. Penning,Asaf Salamov,Yu Wang,Lifang Zhang,Nicholas C. Carpita,Michael Freeling,Alan R. Gingle,C. Thomas Hash,Beat Keller,Patricia E. Klein,Stephen Kresovich,Maureen C. McCann,Ray Ming,Daniel G. Peterson,Daniel G. Peterson,Mehboob-ur-Rahman,Mehboob-ur-Rahman,Doreen Ware,Doreen Ware,Peter Westhoff,Klaus F. X. Mayer,Joachim Messing,Daniel S. Rokhsar,Daniel S. Rokhsar +50 more
TL;DR: An initial analysis of the ∼730-megabase Sorghum bicolor (L.) Moench genome is presented, placing ∼98% of genes in their chromosomal context using whole-genome shotgun sequence validated by genetic, physical and syntenic information.
Journal ArticleDOI
Genome sequencing and analysis of the model grass Brachypodium distachyon
John P. Vogel,David F. Garvin,Todd C. Mockler,Jeremy Schmutz,Daniel S. Rokhsar,Michael W. Bevan,Kerrie Barry,Susan Lucas,Miranda Harmon-Smith,Kathleen Lail,Hope Tice,Jane Grimwood,Neil McKenzie,Naxin Huo,Yong Q. Gu,Gerard R. Lazo,Olin D. Anderson,Frank M. You,Ming-Cheng Luo,Jan Dvorak,Jonathan M. Wright,Melanie Febrer,Dominika Idziak,Robert Hasterok,Erika Lindquist,Mei Wang,Samuel E. Fox,Henry D. Priest,Sergei A. Filichkin,Scott A. Givan,Douglas W. Bryant,Jeff H. Chang,Haiyan Wu,Wei Wu,An-Ping Hsia,Patrick S. Schnable,Anantharaman Kalyanaraman,Brad Barbazuk,Todd P. Michael,Samuel P. Hazen,Jennifer N. Bragg,Debbie Laudencia-Chingcuanco,Yiqun Weng,Georg Haberer,Manuel Spannagl,Klaus F. X. Mayer,Thomas Rattei,Therese Mitros,Sang-Jik Lee,Jocelyn K. C. Rose,Lukas A. Mueller,Thomas L. York,Thomas Wicker,Jan P. Buchmann,Jaakko Tanskanen,Alan H. Schulman,Heidrun Gundlach,Michael W. Bevan,Antonio Costa de Oliveira,Luciano da C. Maia,William R. Belknap,Ning Jiang,Jinsheng Lai,Liucun Zhu,Jianxin Ma,Cheng Sun,Ellen J. Pritham,Jérôme Salse,Florent Murat,Michael Abrouk,Rémy Bruggmann,Joachim Messing,Noah Fahlgren,Christopher M. Sullivan,James C. Carrington,Elisabeth J. Chapman,Greg D. May,Jixian Zhai,Matthias Ganssmann,Sai Guna Ranjan Gurazada,Marcelo A German,Blake C. Meyers,Pamela J. Green,Ludmila Tyler,Jiajie Wu,James A. Thomson,Shan Chen,Henrik Vibe Scheller,Jesper Harholt,Peter Ulvskov,Jeffrey A. Kimbrel,Laura E. Bartley,Peijian Cao,Ki-Hong Jung,Manoj Sharma,Miguel E. Vega-Sánchez,Pamela C. Ronald,Chris Dardick,Stefanie De Bodt,Wim Verelst,Dirk Inzé,Maren Heese,Arp Schnittger,Xiaohan Yang,Udaya C. Kalluri,Gerald A. Tuskan,Zhihua Hua,Richard D. Vierstra,Yu Cui,Shuhong Ouyang,Qixin Sun,Zhiyong Liu,Alper Yilmaz,Erich Grotewold,Richard Sibout,Kian Hématy,Grégory Mouille,Herman Höfte,Todd P. Michael,Jérôme Pelloux,Devin O'Connor,James C. Schnable,Scott C. Rowe,Frank G. Harmon,Cynthia L. Cass,John C. Sedbrook,Mary E. Byrne,Sean Walsh,Janet Higgins,Pinghua Li,Thomas P. Brutnell,Turgay Unver,Hikmet Budak,Harry Belcram,Mathieu Charles,Boulos Chalhoub,Ivan Baxter +136 more
TL;DR: The high-quality genome sequence will help Brachypodium reach its potential as an important model system for developing new energy and food crops and establishes a template for analysis of the large genomes of economically important pooid grasses such as wheat.
Genome sequencing and analysis of themodel grass Brachypodium distachyon
John P. Vogel,David F. Garvin,Todd C. Mockler,Jeremy Schmutz,Daniel S. Rokhsar,Michael W. Bevan +5 more
TL;DR: The first member of the Pooideae subfamily to be sequenced was the wild grass Brachypodium distachyon (Brachypodium), which was described in this article.
Journal ArticleDOI
Concerted evolution of repetitive dna sequences in eukaryotes
John F. Elder,Bruce J. Turner +1 more
TL;DR: It is argued that any natural grouping that is characterized by reproductive isolation and limited gene flow is capable of exhibiting concerted evolution of repetitive DNA arrays, and thus has important implications for the differentiation and discrimination of natural populations.
Related Papers (5)
Distribution of 45S rDNA sites in chromosomes of plants: Structural and evolutionary implications
Fernando Roa,Marcelo Guerra +1 more