Journal ArticleDOI
Nuclear DNA variation in Eu-Sorghums
R. S. Paroda,R. S. Paroda,H Rees +2 more
Reads0
Chats0
TLDR
There are significant differences in nuclear DNA amount between Eu-Sorghum species and it is suggested that the lower DNA concentration may reflect a lower proportion of heterochromatin relative to euchromatin in the wild as compared with the cultivated forms.Abstract:
There are significant differences in nuclear DNA amount between Eu-Sorghum species. The DNA variation is considerable. For example Sorghum durra has 63 per cent more DNA than Sorghum roxburghii. Increase in nuclear DNA is accompanied by increase in the mass of the nucleolus and of non-nucleolar material including the chromosomes. The ratio of DNA to non-DNA material is constant between species. The DNA concentration per unit volume at interphase in somatic nuclei and per unit of chromosome length is significantly lower in the wild species S. sudanense and S. virgatum than in the cultivated species S. caudatum, S. conspicuum, S. durra and S. roxburghii. It is suggested that the lower DNA concentration may reflect a lower proportion of heterochromatin relative to euchromatin in the wild as compared with the cultivated forms.read more
Citations
More filters
Journal ArticleDOI
Nuclear DNA Amounts in Angiosperms
Michael D. Bennett,J. B. Smith +1 more
TL;DR: This paper lists absolute nuclear DNA amounts for 753 angiosperm species, primarily for reference purposes, and so the species are listed in alphabetical order, as this was felt to be more helpful to cyto- and biochemists whom, it is anticipated, will be among its major users.
Journal ArticleDOI
Nuclear DNA Content and Minimum Generation Time in Herbaceous Plants
TL;DR: It is shown that the mean cell cycle time and the mean meiotic duration in annual species is significantly shorter than in perennial species, and that satellite DNA is significant in its nucleotypic effects on developmental processes.
Journal ArticleDOI
Nuclear dna content in the genera zea and sorghum intergeneric interspecific and intraspecific variation
D A Laurie,Michael D. Bennett +1 more
TL;DR: Microdensitometry measurements showed that 4C DNA content varied significantly both within the genus Zea as a whole and within maize itself, and no significant differences in DNA content were found between accessions of diploid Sorghum bicolor.
Book ChapterDOI
Genome Size Evolution in Plants
TL;DR: This chapter provides an overview of the current state of knowledge concerning genome size evolution in plants, including a review of available data, the patterns of variation both within and among species, and higher taxa.
Book ChapterDOI
The origin of the wide species variation in nuclear dna content
H Rees,R.N. Jones +1 more
TL;DR: This chapter discusses the origin of the wide species variation in nuclear DNA content, which is attributable to the amplification or reduction of DNA segments within chromosomes.
References
More filters
Journal ArticleDOI
Repeated Sequences in DNA
Roy J. Britten,D. E. Kohne +1 more
TL;DR: Hundreds of thousands of copies of DNA sequences have been incorporated into the genomes of higher organisms and used in medicine, science, and engineering.
Journal ArticleDOI
Base Sequence and Evolution of Guinea-pig α-Satellite DNA
TL;DR: Primary structural analysis reveals that the basic repeating sequence in satellite DNA may be much shorter than reassociation studies have indicated.
Journal ArticleDOI
Relationships between mitotic cycle duration, S period duration and the average rate of DNA synthesis in the root meristem cells of several plants
TL;DR: The average mitotic cycle duration of root meristem cells of several plants was measured with 3H-thymidine and showed that the cycle duration increases with an increase in the DNA content per cell and the average rate of DNA synthesis increased.
Journal ArticleDOI
a Relationship Between DNA Content, Nuclear Volume, and Minimum Mitotic Cycle Time
J. Van't Hof,Arnold H. Sparrow +1 more
Journal ArticleDOI
Measurements of deoxyribosenucleic acid (DNA) in higher plants by Feulgen photometry and chemical methods
J. McLeish,N. Sunderland +1 more
TL;DR: The Feulgen data indicated that both changes were due to an alteration in the relative proportions of 2C, 4C and 8C nuclei and not to changes in the amount of DNA per haploid chromatid set.
Related Papers (5)
Measurements of deoxyribosenucleic acid (DNA) in higher plants by Feulgen photometry and chemical methods
J. McLeish,N. Sunderland +1 more
a Relationship Between DNA Content, Nuclear Volume, and Minimum Mitotic Cycle Time
J. Van't Hof,Arnold H. Sparrow +1 more