00796nas a2200205   4500008004100000020001400041245016500055210006900220260000900289300001200298490000800310100002300318700001600341700002200357700001900379700002400398700002000422700002300442856012500465       2008                        eng d  a1424-858100aDifferences in ribosomal DNA distribution on A and B chromosomes between eastern and western populations of the grasshopper <i>Eyprepocnemis plorans plorans</i>0 aDifferences in ribosomal DNA distribution on A and B chromosomes  c2008  a260-2650 v1211 aLopez-Leon, M., D.1 aCabrero, J.1 aDzyubenko, V., V.1 aBugrov, A., G.1 aKaramysheva, T., V.1 aRubtsov, N., B.1 aCamacho, J., P. M.  uhttps://icgf.myspecies.info/content/differences-ribosomal-dna-distribution-and-b-chromosomes-between-eastern-and-western02486nas a2200217   4500008004100000020001400041245016500055210006900220260000900289300001200298490000800310520167600318100002301994700001602017700002202033700001902055700002402074700002002098700002302118856012702141       2008                        eng d  a1424-858100aDifferences in ribosomal DNA distribution on A and B chromosomes between eastern and western populations of the grasshopper <i>Eyprepocnemis plorans plorans</i>0 aDifferences in ribosomal DNA distribution on A and B chromosomes  c2008  a260-2650 v1213 aDistribution 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.1 aLopez-Leon, M., D.1 aCabrero, J.1 aDzyubenko, V., V.1 aBugrov, A., G.1 aKaramysheva, T., V.1 aRubtsov, N., B.1 aCamacho, J., P. M.  uhttps://icgf.myspecies.info/content/differences-ribosomal-dna-distribution-and-b-chromosomes-between-eastern-and-western-0