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Long-term retainment of some chromosomal inversions in a local population of Belgica antarctica Jacobs (Diptera, Chironomidae)
- Source :
- Czech Polar Reports. 11:16-24
- Publication Year :
- 2021
- Publisher :
- Masaryk University Press, 2021.
-
Abstract
- Genome of antarctic endemic Belgica antarctica Jacobs has been sequenced. However, no set of inversion diagnostic markers has ever been assigned for the species. Using the classical method of polytene chromosome squash preparation, we found three heterozygous inversions located on the second (two heterozygous inversions) and third chromosomes (one heterozygous inversion) in the Belgica antarctica population of a cape o f Wiencke Island, 5 00 m to SW from Port Lockroy. The chromosome set and chromosome variability did not differ from those described in the literature (Atchley and Davis 1979). Every salivary gland chromosome ha d its own markers by which it can be determined. However, we did not find a sex-linked inversion on chromosome III and heterozygous inversion on chromosome I, reported in earlier studies . For the first time , we observed a strong heterochromatin band in chromosome III at the telomere of one arm. Our data show not only the stability of the described inversions in the population but also the usefulness of the squash preparation technique in the studies of genetic variability of Belgica antarctica in present time .
- Subjects :
- Belgica antarctica
education.field_of_study
Polytene chromosome
biology
Heterochromatin
fungi
Population
Chromosome
biology.organism_classification
Chironomidae
Genome
Evolutionary biology
General Earth and Planetary Sciences
Genetic variability
General Agricultural and Biological Sciences
education
General Environmental Science
Subjects
Details
- ISSN :
- 18050697 and 18050689
- Volume :
- 11
- Database :
- OpenAIRE
- Journal :
- Czech Polar Reports
- Accession number :
- edsair.doi...........efac2249f18018742fb9e856e8d5eb79