Inversions shape the divergence of Drosophila pseudoobscura and D. persimilis on multiple timescales
Inversions shape the divergence of Drosophila pseudoobscura and D. persimilis on multiple timescales
复制标题
反演塑造了伪暗果蝇和 D. persimilis 在多个时间尺度上的分歧
DOI:
10.1101/842047
复制
发表时间:
2021
期刊:
影响因子:
3.3
通讯作者:
Noor, Mohamed A.
中科院分区:
文献类型:
--
作者:
Korunes, Katharine L.;Machado, Carlos A.;Noor, Mohamed A.
By shaping meiotic recombination, chromosomal inversions can influence genetic exchange between hybridizing species. Despite the recognized importance of inversions in evolutionary processes such as divergence and speciation, teasing apart the effects of inversions over time remains challenging. Many recent studies have examined gene exchange between hybridizing species and observed higher divergence associated with inversion polymorphisms in hybrids. Studies have attributed such patterns either to interspecies gene flow homogenizing collinear regions or to pre-speciation segregation of inversion polymorphisms in the ancestral population. We provide a comprehensive look into the influence of chromosomal inversions on gene flow throughout the evolutionary history of a classic system:Drosophila pseudoobscuraandD. persimilis. We acquired extensive whole-genome sequence data to report patterns of introgression and divergence with respect to chromosomal arrangement. Curiously, divergence measures toD. persimilisare higher for allopatric than sympatricD. pseudoobscurapopulations in both inverted and collinear regions, which could indicate recent gene exchange that affects even inverted regions. However, consideration of ancestral inversion polymorphisms and different evolutionary rates in these populations reveals that recent gene exchange is a major but not the sole driver of variation in overall sequence divergence. Overall, we show that inversions have contributed to divergence patterns betweenDrosophila pseudoobscuraandD. persimilisover three distinct timescales: 1) pre-speciation segregation of ancestral polymorphism, 2) post-speciation ancient gene flow, and 3) recent introgression. We discuss these results in terms of our understanding of evolution in this classic system and provide cautions for interpreting divergence measures in similar datasets in other systems.
登录
查看更多内容
影响因子:
3.3
作者:
Costa RJ;Wilkinson-Herbots H
通讯作者:
Wilkinson-Herbots H
影响因子:
3.3
作者:
Rong;J. Hey
通讯作者:
J. Hey
影响因子:
1.5
作者:
Jackson, Benjamin Charles
通讯作者:
Jackson, Benjamin Charles
影响因子:
3.3
作者:
S. Schaeffer;W. Anderson
通讯作者:
W. Anderson
DOI:
--
发表时间:
--
期刊:
--
影响因子:
--
作者:
通讯作者:
--