Chromosomal polymorphism in natural populations of Chironomus borokensis Kerkis, Filippova, Shobanov, Gunderina et Kiknadze, 1988 (Diptera, Chironomidae)

By

Golygina, Veronika
Broshkov, Andrey
Ermolaeva, Oksana

Type

Article

Date of Publication

2025

Original Publication

Comparative cytogenetics : international journal of plant & animal cytogenetics, karyosystematics and molecular systematics

Volume

19

Pages

51--74

Subjects

banding sequence , B-chromosome , Ch. plumosus group , inversion , karyological analysis , karyotype , polytene chromosome , sibling species , translocation

Contributed by

Pensoft Publishers

Language

English

Published by

St. Petersburg, Russia [Published] with technical support of Zoological Institute RAS [2007]-

Identifiers

DOI: https://doi.org/10.3897/compcytogen.19.141735

 

Abstract

Chromosomal polymorphism has been studied in 31 natural populations of Ch. borokensis. For 11 out of 31 populations quantitative analysis of chromosomal polymorphism has been performed. Data from previous publications (10 populations) have also been used to perform an overview of the chromosomal polymorphism of Ch. borokensis and to establish the species range. Most studied populations show a high level of chromosomal polymorphism: on average 66.1 ± 2.6% of specimens were heterozygotes with 1.1 ± 0.6 heterozygotic inversions per larvae. The number of banding sequences found in populations varied from 7 to 18 per population with an average of 12 ± 3. Inversions were found in all chromosomal arms. Besides inversions, B-chromosome was present in 13 populations, and 5 translocations were found. The total number of banding sequences found in banding sequence pool of Ch. borokensis is 40. Twenty six banding sequences are described for the first time for the species.