Characterization of potentially functional 5S rRNA-encoding genes within ribosomal DNA repeats of the nematode Meloidogyne arenaria

Vahidi, Haleh; Purac, A.; Leblanc, Josée; Honda, Barry M.

doi:10.1016/0378-1119(91)90446-i

Cited by 17 publications

(6 citation statements)

References 9 publications

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“…Among invertebrates, the 18S-28S and 5S rDNAs were found in the same chromosome in the nematode Meloidogyne arenaria (Vahidi et al, 1991) and in seven out of 11 species of calanoid copepods so far analyzed.…”

Section: Discussionmentioning

confidence: 95%

FISH mapping of 18S-28S and 5S ribosomal DNA, (GATA)n and (TTAGGG)n telomeric repeats in the periwinkle Melarhaphe neritoides (Prosobranchia, Gastropoda, Caenogastropoda)

et al. 2002

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Section: Discussionmentioning

confidence: 95%

FISH mapping of 18S-28S and 5S ribosomal DNA, (GATA)n and (TTAGGG)n telomeric repeats in the periwinkle Melarhaphe neritoides (Prosobranchia, Gastropoda, Caenogastropoda)

et al. 2002

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“…In vertebrates, the major and 5S rRNA genes are rarely located on the same chromosome (Schmid et al, 1987;Lucchini et al, 1993;Mäkinen et al, 1997). The two gene families are found on the same chromosome in the nematode Meloidogyne arenaria (Vahidi et al, 1991) and in the gastropod periwinkle Melarhaphe neritoides (Colomba et al, 2002).…”

Section: Modal Haploid Number and Karyotype Of Pectinidaementioning

confidence: 99%

Chromosomal Rearrangement in Pectinidae Revealed by rRNA Loci and Implications for Bivalve Evolution

Wang

Guo

2004

The Biological Bulletin

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Karyotype and chromosomal localization of major (18-5.8-28S) and minor (5S) ribosomal RNA genes were studied in two species of Pectinidae, zhikong (Chlamys farreri) and bay (Argopecten irradians irradians) scallops, using fluorescence in situ hybridization (FISH). C. farreri had a haploid number of 19 with a karyotype of 3m + 4sm + 7sm-st + 4st + 1st-t, and A. i. irradians had a haploid number of 16 with a karyotype of 5st + 11t. In C. farreri, the major and minor rRNA genes had one locus each and were mapped to the same chromosome-Chromosome 5. In A. i. irradians, the major rRNA genes had two loci, located on Chromosomes 4 and 8, and the 5S rRNA gene was found at a third chromosome-Chromosome 10. Results of this and other studies indicate that karyotype of A. i. irradians (n = 16, 21 arms) is secondary and derived from an ancestral karyotype similar to that of C. farreri (n = 19, 38 arms) through considerable chromosomal loss and rearrangements. The ability to tolerate significant chromosomal loss suggests that the modal karyotype of Pectinidae and possibly other bivalves with a haploid number of 19 is likely tetraploid; i.e., at least one genome duplication has occurred during the evolution of Bivalvia.

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“…In eukaryotes, the coordinate expression of different genes allows the formation of the complex ribosome machinery (Nygard and Nilsson, 1987;Vahidi et al, 1991). However, the ribosomal coding genes 18S, 5.8 and 26S or 28S, with their flanking regions, are the genes most used for phylogenetic and diagnostic studies.…”

Section: Introductionmentioning

confidence: 99%

Comparison of the sequences of the D3 expansion of the 26S ribosomal genes reveals different degrees of heterogeneity in different populations and species of Pratylenchus from the Mediterranean region

Luca

Fanelli

Vito

et al. 2004

European Journal of Plant Pathology

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Plant parasitic nematodes belonging to the genus Pratylenchus, also known as root lesion nematodes, cause serious economic damage to different crop plants. In order to explore genetic structures in different isolates, we investigated several P. thornei, P. neglectus and P. penetrans populations of different geographic origins. The analysis at the species level was also extended to P. penetrans, P. pinguicaudatus, P. vulnus and P. mediterraneus. Sequence analysis of a specific portion of DNA was carried out. In particular, the sequences of the D3 region of the 26S gene were obtained and compared with similar sequences available in databases. The results support the hypothesis that P. penetrans may represent a species complex, while in P. neglectus the intra-species heterogeneity observed is due to intra-individual variability. Furthermore, the specific conservation of some nucleotides in different P. thornei populations indicates their fixation in the rDNA repeats in this species. The presence of these nucleotides, the molecular signature of P. thornei, may assist in determining the nature of nematode infections.

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Characterization of potentially functional 5S rRNA-encoding genes within ribosomal DNA repeats of the nematode Meloidogyne arenaria

Cited by 17 publications

References 9 publications

FISH mapping of 18S-28S and 5S ribosomal DNA, (GATA)n and (TTAGGG)n telomeric repeats in the periwinkle Melarhaphe neritoides (Prosobranchia, Gastropoda, Caenogastropoda)

FISH mapping of 18S-28S and 5S ribosomal DNA, (GATA)n and (TTAGGG)n telomeric repeats in the periwinkle Melarhaphe neritoides (Prosobranchia, Gastropoda, Caenogastropoda)

Chromosomal Rearrangement in Pectinidae Revealed by rRNA Loci and Implications for Bivalve Evolution

Comparison of the sequences of the D3 expansion of the 26S ribosomal genes reveals different degrees of heterogeneity in different populations and species of Pratylenchus from the Mediterranean region

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