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Differences in ribosomal DNA distribution on A and B chromosomes between eastern and western populations of the grasshopper Eyprepocnemis plorans plorans.
Cytogenet Genome Res. 2008; 121(3-4):260-5.CG

Abstract

Distribution of ribosomal DNA (rDNA) on standard (A) and supernumerary (B) chromosomes of the grasshopper Eyprepocnemis plorans was analysed in specimens collected in Turkey and Armenia, belonging to the E. p. plorans subspecies, and in South Africa, belonging to the E. p. meridionalis subspecies. The latter individuals showed rDNA loci in chromosomes 9 and 11 only, whereas those from Armenia carried it in chromosomes 9 and 11 or else in chromosomes 9-11, depending on the population. The specimens from Turkey carried it in chromosomes 1, 9-11 and X. A comparison of this pattern with those previously observed in populations from Spain, Morocco, and Greece (belonging to E. p. plorans) suggests the existence of two evolutionary patterns in rDNA chromosome location in A chromosomes of this subspecies: eastern populations showing rDNA restricted to the small (9-11) chromosomes (as in E. p. meridionalis and other closely related taxa within the Eyprepocneminae subfamily) and western populations carrying rDNA in most A chromosomes (Spain) or all of them (Morocco). The intermediate pattern discerned in geographically intermediate populations (in Greece and Turkey), with rDNA also being located on the X chromosome, suggests a possible east-west cline. Additional support for east-west differentiation in the rDNA location pattern comes from the analysis of B chromosomes. In eastern populations, including Daghestan, Armenia, Turkey, and Greece, B chromosomes are composed mostly of rDNA, whereas in western populations (Spain and Morocco) they contain roughly similar amounts of rDNA and a 180-bp tandem repeat (satDNA), the latter being scarce in eastern Bs.

Authors+Show Affiliations

Departamento de Genética, Universidad de Granada, Granada, Spain.No affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info available

Pub Type(s)

Journal Article
Research Support, Non-U.S. Gov't

Language

eng

PubMed ID

18758168

Citation

López-León, M D., et al. "Differences in Ribosomal DNA Distribution On a and B Chromosomes Between Eastern and Western Populations of the Grasshopper Eyprepocnemis Plorans Plorans." Cytogenetic and Genome Research, vol. 121, no. 3-4, 2008, pp. 260-5.
López-León MD, Cabrero J, Dzyubenko VV, et al. Differences in ribosomal DNA distribution on A and B chromosomes between eastern and western populations of the grasshopper Eyprepocnemis plorans plorans. Cytogenet Genome Res. 2008;121(3-4):260-5.
López-León, M. D., Cabrero, J., Dzyubenko, V. V., Bugrov, A. G., Karamysheva, T. V., Rubtsov, N. B., & Camacho, J. P. (2008). Differences in ribosomal DNA distribution on A and B chromosomes between eastern and western populations of the grasshopper Eyprepocnemis plorans plorans. Cytogenetic and Genome Research, 121(3-4), 260-5. https://doi.org/10.1159/000138894
López-León MD, et al. Differences in Ribosomal DNA Distribution On a and B Chromosomes Between Eastern and Western Populations of the Grasshopper Eyprepocnemis Plorans Plorans. Cytogenet Genome Res. 2008;121(3-4):260-5. PubMed PMID: 18758168.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Differences in ribosomal DNA distribution on A and B chromosomes between eastern and western populations of the grasshopper Eyprepocnemis plorans plorans. AU - López-León,M D, AU - Cabrero,J, AU - Dzyubenko,V V, AU - Bugrov,A G, AU - Karamysheva,T V, AU - Rubtsov,N B, AU - Camacho,J P M, Y1 - 2008/08/29/ PY - 2008/05/08/accepted PY - 2008/9/2/pubmed PY - 2008/9/18/medline PY - 2008/9/2/entrez SP - 260 EP - 5 JF - Cytogenetic and genome research JO - Cytogenet. Genome Res. VL - 121 IS - 3-4 N2 - Distribution of ribosomal DNA (rDNA) on standard (A) and supernumerary (B) chromosomes of the grasshopper Eyprepocnemis plorans was analysed in specimens collected in Turkey and Armenia, belonging to the E. p. plorans subspecies, and in South Africa, belonging to the E. p. meridionalis subspecies. The latter individuals showed rDNA loci in chromosomes 9 and 11 only, whereas those from Armenia carried it in chromosomes 9 and 11 or else in chromosomes 9-11, depending on the population. The specimens from Turkey carried it in chromosomes 1, 9-11 and X. A comparison of this pattern with those previously observed in populations from Spain, Morocco, and Greece (belonging to E. p. plorans) suggests the existence of two evolutionary patterns in rDNA chromosome location in A chromosomes of this subspecies: eastern populations showing rDNA restricted to the small (9-11) chromosomes (as in E. p. meridionalis and other closely related taxa within the Eyprepocneminae subfamily) and western populations carrying rDNA in most A chromosomes (Spain) or all of them (Morocco). The intermediate pattern discerned in geographically intermediate populations (in Greece and Turkey), with rDNA also being located on the X chromosome, suggests a possible east-west cline. Additional support for east-west differentiation in the rDNA location pattern comes from the analysis of B chromosomes. In eastern populations, including Daghestan, Armenia, Turkey, and Greece, B chromosomes are composed mostly of rDNA, whereas in western populations (Spain and Morocco) they contain roughly similar amounts of rDNA and a 180-bp tandem repeat (satDNA), the latter being scarce in eastern Bs. SN - 1424-859X UR - https://www.unboundmedicine.com/medline/citation/18758168/Differences_in_ribosomal_DNA_distribution_on_A_and_B_chromosomes_between_eastern_and_western_populations_of_the_grasshopper_Eyprepocnemis_plorans_plorans_ L2 - https://www.karger.com?DOI=10.1159/000138894 DB - PRIME DP - Unbound Medicine ER -