RIBOSOMAL-RNA GENES IN MOSQUITOS - LOCALIZATION BY FLUORESCENCE IN-SITU HYBRIDIZATION (FISH)

被引:28
作者
MARCHI, A
PILI, E
机构
[1] Istituto di Biologia Generale, Università di Cagliari, Cagliari, 09124
关键词
FISH; MOSQUITO CHROMOSOMES; RIBOSOMAL-RNA GENES;
D O I
10.1038/hdy.1994.83
中图分类号
Q14 [生态学(生物生态学)];
学科分类号
071012 ; 0713 ;
摘要
Fluorescence in situ hybridization (FISH) was used to localize the 18S-28S ribosomal RNA gene clusters on the chromosomes of 15 mosquito species belonging to the Anophelinae and Culicinae subfamilies. In the genus Anopheles the rRNA genes are localized on the heterochromatic arm of both sex chromosomes. The association between rRNA genes and sex determining chromosomes also applies to the homomorphic karyotype of Culicinae mosquitoes, at least in those cases in which localization of the sex locus/loci has been determined. In these species ribosomal genes are often found within or adjacent to heterochromatic regions (C bands). Differences in the location of rRNA genes among and within genera suggest the occurrence of several chromosomal rearrangements during the evolution of mosquitoes.
引用
收藏
页码:599 / 605
页数:7
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