+ Site Statistics
+ Search Articles
+ PDF Full Text Service
How our service works
Request PDF Full Text
+ Follow Us
Follow on Facebook
Follow on Twitter
Follow on LinkedIn
+ Subscribe to Site Feeds
Most Shared
PDF Full Text
+ Translate
+ Recently Requested

Variation of the intergenic spacer region of ribosomal dna in cultivated and wild rice species



Variation of the intergenic spacer region of ribosomal dna in cultivated and wild rice species



Genome 33(2): 209-218



Spacer-length variation in ribosomal DNA (rDNA) was surveyed in two cultivated rice species and their wild relatives. Among 243 accessions observed, 18 different spacer-length variants were detected. Length heterogeneity was found within and among species as well as within individuals. Conventional genetic analysis revealed that two spacer-length variants were located at two unlinked loci. Restriction enzyme maps showed that length heterogeneity resulted from repetition of short repeated sequences in the intergenic spacer region in the Asian cultivar and its progenitor; however, the spacer region greatly differed from those of repreductively isolated taxa with respect to the length and the sequence. Furthermore, the Asian cultivated species and its progenitor were highly polymorphic for rDNA spacer-length variation and they were differentiated in frequencies of spacer-length variants as well as varietal groups within the cultivated species. Asian cultivars tended to carry homogeneous repeats of rDNA compared with their progenitor, suggesting different forms of homogenization occurring in Asian cultivars.

Please choose payment method:






(PDF emailed within 1 workday: $29.90)

Accession: 007995165

Download citation: RISBibTeXText


Related references

Ribosomal gene spacer length variability in cultivated and wild rice species. Tag. Theoretical and Applied Genetics. Theoretische und Angewandte Genetik 79(1): 81-88, 1990

Structural variation and dynamics of the nuclear ribosomal intergenic spacer region in key members of the Gibberella fujikuroi species complex. Genome 56(4): 205-213, 2013

Host Selectivity and Genetic Variation of Discula umbrinella Isolates from Two Oak Species: Analyses of Intergenic Spacer Region Sequences of Ribosomal Dna. Microbial Ecology 52(3): 463-469, 2006

Host selectivity and genetic variation of Discula umbrinella isolates from two oak species: analyses of intergenic spacer region sequences of ribosomal DNA. Microbial Ecology 52(3): 463-469, 2006

Variation in the intergenic spacer of ribosomal dna of wild wheat triticum dicoccoides in israel. Molecular Biology & Evolution 3(6): 547-558, 1986

Characterization of ribosomal RNA intergenic spacer region of several seedborne bacterial pathogens of rice. Seed Science & Technology 24(3): 571-580, 1996

The nuclear ribosomal DNA intergenic spacers of wild and cultivated soybean have low variation and cryptic subrepeats. Genome 41(2): 183-192, 1998

Variation of ribosomal gene spacer length among wild and cultivated banana. Heredity 68(2): 147-156, 1992

Ribosomal RNA genes of Phaseolus coccineus. IV. Structure and comparative-analysis of the intergenic spacer: possible involvement of some nucleotides in the transcription control of coding sequences. Sequence of the intergenic spacer of ribosomal genes. Dna Sequence 9(1): 45-48, 1998

The ribosomal intergenic spacer (IGS) region in Schistosoma japonicum: structure and comparisons with related species. Infection Genetics and Evolution 11(3): 610-617, 2011

Simple species identification of Trichinella isolates by amplification and sequencing of the 5S ribosomal DNA intergenic spacer region. Veterinary Parasitology 132(1-2): 57-61, 2005

RFLP of analyses of an intergenic spacer region of chloroplast DNA in some wild wheat species. African Journal of Biotechnology 5(22): 2058-2061, 2006

Identification of species of Abiotrophia, Enterococcus, Granulicatella and Streptococcus by sequence analysis of the ribosomal 16S-23S intergenic spacer region. Journal of Medical Microbiology 56(Pt 4): 504-513, 2007

PCR-based RFLP analysis of an intergenic spacer region in cpDNA of some wild wheat species. Botanical Journal of the Linnean Society 148(3): 305-310, 2005

The nucleotide sequence of the rDNA intergenic spacer region in a wild species of the genus Vicia, V. angustifolia. Plant Molecular Biology 18(1): 175-178, 1992