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Uozu, Sakurako; Ikehashi, Hiroshi; Ohmido, Nobuko; Ohtsubo, Hideomi; Ohtsubo, Eiichi; Fukui, Kiichi

doi:10.1023/a:1005823124989

Cited by 140 publications

(30 citation statements)

References 17 publications

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“…It is also known that retroelements constitute a major class of repetitive DNA sequences in plants (20,22). In rice (O. sativa L.), there are, in addition to the small number of copia-like retrotransposons as we estimated, also a small number of non-LTR retroelements, long interspersed nuclear elements (S.W., unpublished data).…”

Section: Discussionmentioning

confidence: 63%

“…The main feature is the highly restricted distribution of the retroelements in the rice genome, in which the copia-like retrotransposons, although found on all the 12 chromosomes, appeared mainly in one arm of each chromosome. Such localized distribution is clearly distinct from all other plant species studied thus far, including sugar beet, maize, barley, fava bean, and a wild rice (O. australiensis Domin), in which retroelements were detected throughout the chromosomes, except certain segments such as centromeric, telomeric, or nucleolus organizer regions (17)(18)(19)(20)(21)(22).…”

Section: Discussionmentioning

confidence: 70%

“…The copy number of copia-like retroelements in fava bean is Ϸ10 6 (19). In a wild rice (O. australiensis Domin), with genome size Ϸ2.1 times that of the cultivated rice, there are about 8 ϫ 10 4 copies of a copia-like element, RIRE1 (22).…”

Section: Discussionmentioning

confidence: 99%

“…It has been suggested that the sizes of eukaryotic genomes are determined, to a large extent, by the amounts of repetitive DNA sequences (22,33). It is also known that retroelements constitute a major class of repetitive DNA sequences in plants (20,22).…”

Section: Discussionmentioning

confidence: 99%

“…Plants such as sugar beets, maize, barley, fava beans, and also a wild rice (Oryza australiensis Domin, E genome) contain extremely large numbers of retrotransposons that are distributed throughout the chromosomes (17)(18)(19)(20)(21)(22). However, information is scarce concerning the genomic distribution of retroelements in plants containing relatively small numbers of the elements.…”

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confidence: 99%

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The distribution and copy number of copia -like retrotransposons in rice ( Oryza sativa L.) and their implications in the organization and evolution of the rice genome

Wang¹,

Liu²,

Kai-Man³

et al. 1999

Proc. Natl. Acad. Sci. U.S.A.

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We used 22 fragments corresponding to the reverse transcriptase domain of copia-like retrotransposons as representatives to study the organization and distribution of these elements in the rice genome. The loci detected by these 22 fragments were assigned to 47 locations in the molecularlinkage map involving all 12 chromosomes. The distributional features of copia-like retrotransposons found in the rice genome indicated that (i) the loci detected were located mainly in one arm of each chromosome; (ii) one fragment usually detected several loci that were mapped to similar locations of different chromosomes; (iii) retrotransposons sharing high identity in nucleotide sequences were usually assigned to similar locations of the chromosomes; and (iv) concurrences of multiple loci, detected by different fragments, in similar locations or stretches of different chromosomes were common in the rice genome. We also determined that the copy number of copia-like retrotransposons in rice genome may be as low as Ϸ100 per haploid genome. The restricted distribution, along with low copy number, suggested that copia-like retrotransposons in rice were relatively inactive during evolution compared with those in other plants. The distributional features of the copia-like retrotransposons suggested the existence of possible lineages among the rice chromosomes, which in turn suggested that chromosome duplication and diversification may be a mechanism for the origin and evolution of the rice chromosomes. The information provided by fine mapping of the retroelements in the genetic linkage map may also be useful for gene tagging and molecular cloning.

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Section: Discussionmentioning

confidence: 63%

Section: Discussionmentioning

confidence: 70%

Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

mentioning

confidence: 99%

See 3 more Smart Citations

The distribution and copy number of copia -like retrotransposons in rice ( Oryza sativa L.) and their implications in the organization and evolution of the rice genome

Wang¹,

Liu²,

Kai-Man³

et al. 1999

Proc. Natl. Acad. Sci. U.S.A.

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References

2002

Chromosomes

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Variation of the genome size estimate with environmental conditions in Drosophila melanogaster

et al. 2003

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Background: Genome size is known to exhibit interspecies differences, but also to vary between populations within a given species and even between individual cells within an organism. Major differences have often been reported and attributed to differences in measurement conditions, in internal controls of genome size, and in the stains used. Flow cytometry using intercalating dyes is the most attractive method for measuring genome size. Methods: We estimated relative genome size of nuclei from heads of Drosophila melanogaster adult males using a FACScalibur flow cytometer and propidium iodide. Results: We have shown that the genome size estimates depended on the temperature and humidity of the rearing medium and decreased with age in adult flies. There were large differences in genome size estimates between the vials in which the flies were maintained, but only slight variations within the vials, supporting the idea that the

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Cited by 140 publications

References 17 publications

The distribution and copy number of copia -like retrotransposons in rice ( Oryza sativa L.) and their implications in the organization and evolution of the rice genome

The distribution and copy number of copia -like retrotransposons in rice ( Oryza sativa L.) and their implications in the organization and evolution of the rice genome

References

Variation of the genome size estimate with environmental conditions in Drosophila melanogaster

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