Molecular cytogenetic studies in the ladybird beetle Henosepilachna argus Geoffroy, 1762 (Coleoptera, Coccinellidae, Epilachninae)
| Autor: | Pedro Lorite, Pablo Mora, Jesús Vela, Olivia Sanllorente, Teresa Palomeque |
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| Rok vydání: | 2015 |
| Předmět: |
Insecta
Arthropoda lcsh:QH426-470 Heterochromatin Plant Science C-banding Bivalent (genetics) Genetics Animalia Henosepilachna Research Articles X chromosome biology DAPI staining CoccinellidaeCoccinellidae Chromosome Karyotype Henosepilachna argus NOR telomeres biology.organism_classification Coleoptera karyotype argus lcsh:Genetics Epilachninae Animal Science and Zoology ColeopteraAnimalia Nucleolus organizer region Cucujoidea Biotechnology |
| Zdroj: | Comparative Cytogenetics, Vol 9, Iss 3, Pp 423-434 (2015) Comparative Cytogenetics 9(3): 423-434 Comparative Cytogenetics |
| ISSN: | 1993-078X 1993-0771 |
| DOI: | 10.3897/compcytogen.v9i3.5263 |
| Popis: | The ladybird Henosepilachna argus Geoffroy, 1762 has been cytogenetically studied. In addition we have conducted a review of chromosome numbers and the chromosomal system of sex determination available in the literature in species belonging to the genus Henosepilachna and in its closely related genus Epilachna. Chromosome number of H. argus was 2n=18, including the sex chromosome pair, a common diploid chromosome number within the tribe Epilachnini. The study of prophase I meiotic chromosomes showed the typical Xyp "parachute" bivalent as in the majority of species of Coccinellidae. C-banding and fluorescent staining with AT-specific DAPI fluorochrome dye have been carried out for the first time in H. argus. C-banding technique revealed that heterochromatic blocks are pericentromerically located and DAPI staining showed that this heterochromatin is AT rich. Fluorescence in situ hybridizations using rDNA and the telomeric TTAGG sequence as probes have been carried out. FISH using rDNA showed that the nucleolar organizing region is located on the short arm of the X chromosome. FISH with the telomeric sequence revealed that in this species telomeres of chromosomes are composed of the pentanucleotide TTAGG repeats. This is the first study on the telomeric sequences in Coccinellidae. |
| Databáze: | OpenAIRE |
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