Differences in ribosomal DNA distribution on A and B chromosomes between eastern and western populations of the grasshopper Eyprepocnemis plorans plorans

被引：20

作者：

Lopez-Leon, M. D. ^{[1
]}

Cabrero, J. ^{[1
]}

Dzyubenko, V. V. ^{[2
]}

Bugrov, A. G. ^{[1
,4
]}

Karamysheva, T. V. ^{[3
]}

Rubtsov, N. B. ^{[3
,4
]}

Camacho, J. P. M. ^{[1
]}

机构：

[1] Univ Granada, Dept Genet, ES-18071 Granada, Spain

[2] Novosibirsk State Univ, Novosibirsk 630090, Russia

[3] Russian Acad Sci, Inst Cytol & Genet, Novosibirsk 630090, Russia

[4] Russian Acad Sci, Inst Systemat & Ecol Anim, Siberian Branch, Novosibirsk, Russia

来源：

CYTOGENETIC AND GENOME RESEARCH | 2008年 / 121卷 / 3-4期

关键词：

D O I：

10.1159/000138894

中图分类号：

Q2 [细胞生物学];

学科分类号：

071009 ; 090102 ;

摘要：

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. Copyright (c) 2008 S. Karger AG, Basel.

引用

页码：260 / 265

页数：6