Chromosomal Inversions and the Demography of Speciation in Drosophila montana and Drosophila flavomontana.

ABSTRACT: Chromosomal inversions may play a central role in speciation given their ability to locally reduce recombination and therefore genetic exchange between diverging populations. We analyzed long- and short-read whole-genome data from sympatric and allopatric populations of 2 Drosophila virilis group species, Drosophila montana and Drosophila flavomontana, to understand if inversions have contributed to their divergence. We identified 3 large alternatively fixed inversions on the X chromosome and one on each of the autosomes 4 and 5. A comparison of demographic models estimated for inverted and noninverted (colinear) chromosomal regions suggests that these inversions arose before the time of the species split. We detected a low rate of interspecific gene flow (introgression) from D. montana to

SUBMITTER: Poikela N 

PROVIDER: S-EPMC10972691 | biostudies-literature | 2024 Mar

REPOSITORIES: biostudies-literature