Genome size and base composition of seven Quercus species: inter- and intra-population variation

Genome ◽  
1998 ◽  
Vol 41 (2) ◽  
pp. 162-168 ◽  
Author(s):  
V Zoldos ◽  
D Papes ◽  
S C Brown ◽  
O Panaud ◽  
S Siljak-Yakovlev
Keyword(s):  
Genome Size ◽  
Dna Content ◽  
Base Composition ◽  
Gc Content ◽  
Population Variation ◽  
French Population ◽  
Content Variation ◽  
Quercus Species ◽  
Dna Content Variation ◽  
Two Populations

Seven Quercus species, four deciduous (Q. cerris, Q. petraea, Q. pubescens, andQ. robur) and three evergreen (Q. coccifera, Q. ilex, andQ. suber), were assessed for DNA content. Their genome sizes ranged from 1.88 to 2.00 pg/2C, namely an interspecific DNA content variation of 6%. In addition, the DNA content of several populations of Q. petraea andQ. robur with different geographical origins, French and Croatian, was estimated. DNA content did not vary among four populations of Q. robur, but did differ between two populations of Q. petraea, the French population having a higher 2C DNA value than the Croatian. The genome size of this French population showed important dispersion among 10 measured individuals. This was in accordance with subsequent cytogenetic data that revealed extra chromosomes in some individuals from this population. The percent GC varied little between the species; a GC content of 39.9% is established as typical for oak.Key words: Quercus, flow cytometry, genome size, GC percent, DNA content variations, extra chromosomes.

Genome size increases in recently diverged hornwort clades

Genome ◽  
2013 ◽  
Vol 56 (8) ◽  
pp. 431-435 ◽  
Author(s):  
Jillian D. Bainard ◽  
Juan Carlos Villarreal
Keyword(s):  
Genome Size ◽  
Dna Content ◽  
Size Variation ◽  
Plant Genome ◽  
Ancestral Reconstruction ◽  
Genome Size Variation ◽  
Important Group ◽  
Content Variation ◽  
Dna Content Variation ◽  
Size Estimates

As our knowledge of plant genome size estimates continues to grow, one group has continually been neglected: the hornworts. Hornworts (Anthocerotophyta) have been traditionally grouped with liverworts and mosses because they share a haploid dominant life cycle; however, recent molecular studies place hornworts as the sister lineage to extant tracheophytes. Given the scarcity of information regarding the DNA content of hornworts, our objective was to estimate the 1C-value for a range of hornwort species within a phylogenetic context. Using flow cytometry, we estimated genome size for 36 samples representing 24 species. This accounts for roughly 10% of known hornwort species. Haploid genome sizes (1C-value) ranged from 160 Mbp or 0.16 pg (Leiosporoceros dussii) to 719 Mbp or 0.73 pg (Nothoceros endiviifolius). The average 1C-value was 261 ± 104 Mbp (0.27 ± 0.11 pg). Ancestral reconstruction of genome size on a hornwort phylogeny suggests a small ancestral genome size and revealed increases in genome size in the most recently divergent clades. Much more work is needed to understand DNA content variation in this phylogenetically important group, but this work has significantly increased our knowledge of genome size variation in hornworts.

scholarly journals Marsupial chromosome DNA content and genome size assessed from flow karyotypes: invariable low autosomal GC content

2018 ◽  
Vol 5 (8) ◽  
pp. 171539 ◽  
Author(s):  
Fumio Kasai ◽  
Patricia C. M. O'Brien ◽  
Jorge C. Pereira ◽  
Malcolm A. Ferguson-Smith
Keyword(s):  
Genome Size ◽  
Dna Content ◽  
Chromosome Painting ◽  
Gc Content ◽  
Tammar Wallaby ◽  
Individual Chromosome ◽  
Tasmanian Devil ◽  
Marsupial Species ◽  
Cross Species Chromosome Painting ◽  
High Level

Extensive chromosome homologies revealed by cross-species chromosome painting between marsupials have suggested a high level of genome conservation during evolution. Surprisingly, it has been reported that marsupial genome sizes vary by more than 1.2 Gb between species. We have shown previously that individual chromosome sizes and GC content can be measured in flow karyotypes, and have applied this method to compare four marsupial species. Chromosome sizes and GC content were calculated for the grey short-tailed opossum (2 n = 18), tammar wallaby (2 n = 16), Tasmanian devil (2 n = 14) and fat-tailed dunnart (2 n = 14), resulting in genome sizes of 3.41, 3.31, 3.17 and 3.25 Gb, respectively. The findings under the same conditions allow a comparison between the four species, indicating that the genomes of these four species are 1–8% larger than human. We show that marsupial genomes are characterized by a low GC content invariable between autosomes and distinct from the higher GC content of the marsupial × chromosome.

Nuclear DNA content variation and evolution in liverworts

2013 ◽  
Vol 68 (3) ◽  
pp. 619-627 ◽  
Author(s):  
Jillian D. Bainard ◽  
Laura L. Forrest ◽  
Bernard Goffinet ◽  
Steven G. Newmaster
Keyword(s):  
Dna Content ◽  
Nuclear Dna ◽  
Nuclear Dna Content ◽  
Content Variation ◽  
Dna Content Variation

scholarly journals Neuronal DNA content variation (DCV) with regional and individual differences in the human brain

2010 ◽  
Vol 518 (19) ◽  
pp. 3981-4000 ◽  
Author(s):  
Jurjen W. Westra ◽  
Richard R. Rivera ◽  
Diane M. Bushman ◽  
Yun C. Yung ◽  
Suzanne E. Peterson ◽  
...  
Keyword(s):  
Individual Differences ◽  
Human Brain ◽  
Dna Content ◽  
Content Variation ◽  
Dna Content Variation

scholarly journals Nuclear DNA Content Variation in Life History Phases of the Bonnemasoniaceae (Rhodophyta)

PLoS ONE ◽  
2014 ◽  
Vol 9 (1) ◽  
pp. e86006
Author(s):  
Noemi Salvador Soler ◽  
Amelia Gómez Garreta ◽  
Mª Antonia Ribera Siguan ◽  
Donald F. Kapraun
Keyword(s):  
Life History ◽  
Dna Content ◽  
Nuclear Dna ◽  
Nuclear Dna Content ◽  
Content Variation ◽  
Dna Content Variation

Changes in neuronal DNA content variation in the human brain during aging

Aging Cell ◽  
2012 ◽  
Vol 11 (4) ◽  
pp. 628-633 ◽  
Author(s):  
Hans-Georg Fischer ◽  
Markus Morawski ◽  
Martina K. Brückner ◽  
Anja Mittag ◽  
Attila Tarnok ◽  
...  
Keyword(s):  
Human Brain ◽  
Dna Content ◽  
Content Variation ◽  
Dna Content Variation

Detection of Intraspecific DNA Content Variation inZea maysL. by Flow Cytometry

1989 ◽  
Vol 40 (11) ◽  
pp. 1179-1183 ◽  
Author(s):  
A. LANE RAYBURN ◽  
JULIE A. AUGER ◽  
ELIZABETH A. BENZINGER ◽  
ANGUS G. HEPBURN
Keyword(s):  
Flow Cytometry ◽  
Dna Content ◽  
Content Variation ◽  
Dna Content Variation

Nuclear DNA content variation among perennial taxa of the genus Cyanus (Asteraceae) in Central Europe and adjacent areas

2012 ◽  
Vol 298 (8) ◽  
pp. 1463-1482 ◽  
Author(s):  
Katarína Olšavská ◽  
Marián Perný ◽  
Stanislav Španiel ◽  
Barbora Šingliarová
Keyword(s):  
Central Europe ◽  
Dna Content ◽  
Nuclear Dna ◽  
Nuclear Dna Content ◽  
Content Variation ◽  
Dna Content Variation
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