The influence of climatic changes on chromosome inversion polymorphism in a population of malarial mosquito Anopheles messeae (CULICIDAE) in Tomsk

Abstract

In 2013, the karyotypic structure of the population of malarial mosquito Anopheles messeae in the village of Kolarovo, Tomsk Region, was studied. A level of polymorphism close to the values of the last 20 years has been noted in the studied population. A decrease in autosome heterozygosis and rise of XL₀, 2R_0, 3R₀ and 3L₀ chromosomal variant frequencies has been shown. The results have been compared with the data obtained earlier. During 40 years of monitoring, a significant transformation of frequency characteristics of A. messeae inversion polymorphism has been detected, which occurred gradually. During the period from 1974 to 1979, the frequency stability of the concentration of chromosomal inversion has remained stable in the population of Tomsk Region (Kolarovo village), which is typical for the centre of the specific range. Furthermore, during the period until 1992, there was a serious frequency restructuring in favour of inversions that was specific to the south-western part of the range. In the period from 1993 to 2013, this restructuring has been constantly reproducing from one year to the next. Such a tendency correlates well with climate warming.

Keywords:

• Anopheles messeae
• Polytene chromosomes
• Climate

Acknowledgements

The results were obtained while fulfilling the government order from the Ministry of Education and Science of the Russian Federation.