Chromosomes of three gall wasps of the tribe Aylacini (Hymenoptera, Cynipidae)
| Autor: | Vladimir E. Gokhman |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2021 |
| Předmět: |
Insecta
Arthropoda gall wasps Aulacidea hieracii Zoology Plant Science Hymenoptera Cellular & Organismal genetics QH426-470 Tribe (biology) Russia Dicentric chromosome Cynipidae Molecular Cytogenetics Genetics Gall Animalia chromosome Isocolus jaceae Metaphase biology dicentric Chromosome Karyotype biology.organism_classification Isocolus scabiosae karyotype Cynipoidea Animal Science and Zoology Ploidy Biotechnology Research Article |
| Zdroj: | Comparative Cytogenetics Comparative Cytogenetics, Vol 15, Iss 2, Pp 171-178 (2021) Comparative Cytogenetics 15(2): 171-178 |
| ISSN: | 1993-078X 1993-0771 |
| Popis: | Chromosomes of two species of the tribe Aylacini (Cynipidae), Isocolus jaceae (Schenck, 1863) and I. scabiosae (Giraud, 1859) (both have 2n = 18) were studied for the first time. In addition, 2n = 20 is confirmed in a member of the same tribe, Aulacidea hieracii (Bouché, 1834). All chromosomes of these gall wasps are biarmed; however, they gradually decrease in size in the case of A. hieracii, whereas a pair of large metacentrics is characteristic of karyotypes of both Isocolus Förster, 1869 species. Chromosomes of the two latter gall wasps are either metacentric or submetacentric, but elements with lower centromeric indices prevail in the karyotype of A. hieracii. Chromomycin A3 (CMA3)/DAPI staining revealed single CMA3-positive bands on a particular pair of chromosomes of all species, and these bands apparently refer to the nucleolus organizing regions (NORs). However, localization of CMA3-positive bands differs substantially between the studied members of Isocolus and Aulacidea Ashmead, 1897. Together with normal haploid and diploid mitotic divisions, several metaphase plates with 2n = 17 containing a peculiar dicentric chromosome were found in a single male specimen of I. scabiosae; this appears to be the first report of an obvious dicentric in the order Hymenoptera in general. Certain aspects of the chromosome diversity and karyotype evolution within the family Cynipidae and the tribe Aylacini in particular are briefly discussed. |
| Databáze: | OpenAIRE |
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