Molecular characterization of intergenic spacer region of 5S ribosomal RNA genes in subgenus Vigna: extensive hybridization among V. unguiculata subspecies

2011 ◽  
Vol 294 (1-2) ◽  
pp. 39-55 ◽  
Author(s):  
Archana Vijaykumar ◽  
Ajay Saini ◽  
Narendra Jawali
Keyword(s):  
Molecular Characterization ◽  
Ribosomal Rna ◽  
Intergenic Spacer ◽  
Ribosomal Rna Genes ◽  
5S Ribosomal Rna ◽  
Intergenic Spacer Region ◽  
Rna Genes

Chromosomal Mapping and Molecular Characterization of Ribosomal RNA Genes in Lebias fasciata (Teleostei, Cyprinodontidae)

Genetica ◽  
2004 ◽  
Vol 121 (1) ◽  
pp. 95-100 ◽  
Author(s):  
C. Tigano ◽  
L. Rocco ◽  
V. Ferrito ◽  
D. Costagliola ◽  
A. M. Pappalardo ◽  
...  
Keyword(s):  
Molecular Characterization ◽  
Ribosomal Rna ◽  
Ribosomal Rna Genes ◽  
Chromosomal Mapping ◽  
Rna Genes

The location of 5S (ribosomal) RNA genes in Drosophila hydei

Chromosoma ◽  
1975 ◽  
Vol 51 (4) ◽  
pp. 347-356 ◽  
Author(s):  
C. Alonso ◽  
H. D. Berendes
Keyword(s):  
Ribosomal Rna ◽  
Ribosomal Rna Genes ◽  
5S Ribosomal Rna ◽  
Drosophila Hydei ◽  
Rna Genes

The Nor-D3 locus of Triticum tauschii: natural variation and genetic linkage to markers in chromosome 5

Genome ◽  
1991 ◽  
Vol 34 (3) ◽  
pp. 387-395 ◽  
Author(s):  
E. S. Lagudah ◽  
R. Appels ◽  
D. McNeil
Keyword(s):  
Ribosomal Rna ◽  
Intergenic Spacer ◽  
D Genome ◽  
Triticum Tauschii ◽  
Intergenic Spacer Region ◽  
Grain Softness ◽  
High Level ◽  
Rna Genes ◽  
Rdna Polymorphism ◽  
Grain Softness Protein

Variation in the intergenic spacer region of the ribosomal RNA genes (located at the Nor locus) was assayed in a collection of 411 accessions of Triticum tauschii from Turkey, USSR, Iran, Afghanisan, Pakistan, and China. Twenty rDNA genotypes were identified and it was demonstrated that T. tauschii accessions from the USSR and Iran have the highest diversity at the Nor locus. At least four of the rDNA genotypes were demonstrated to be alleles of a single major locus, in segregating F2 progeny analyses. The TaqI restriction fragment associated with rDNA genotype 7 was shown to be the same as the Nor-D3a allele present in all bread wheats (based on chromosome location and length of the intergenic spacer region). This genotype was significantly associated with T. t. ssp. strangulata, previously argued to be the donor of the D genome to hexaploid wheat. The Nor locus showed a high level of recombination with the 5SDna-2 locus, which was also located on chromosome 5D. The Nor locus is placed distal to the 5SDna-2 locus but proximal to the grain softness protein gene (XGsp) on the short arm of chromosome 5D.Key words: D genome, Nor-D3, rDNA polymorphism, chromosomal location.

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