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Tytuł pozycji:

Influence of the large-Z effect during contact between butterfly sister species.

Tytuł:
Influence of the large-Z effect during contact between butterfly sister species.
Autorzy:
Nelson ED; Department of Biophysics University of Texas Southwestern Medical Center Dallas TX USA.
Cong Q; Department of Biophysics University of Texas Southwestern Medical Center Dallas TX USA.
Grishin NV; Department of Biophysics University of Texas Southwestern Medical Center Dallas TX USA.
Źródło:
Ecology and evolution [Ecol Evol] 2021 Aug 18; Vol. 11 (17), pp. 11615-11626. Date of Electronic Publication: 2021 Aug 18 (Print Publication: 2021).
Typ publikacji:
Journal Article
Język:
English
Imprint Name(s):
Original Publication: [Oxford] : Blackwell Pub. Ltd.
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Contributed Indexing:
Keywords: gene cluster; hybrid incompatibility; introgression; sex chromosome; speciation
Entry Date(s):
Date Created: 20210915 Latest Revision: 20210916
Update Code:
20240105
PubMed Central ID:
PMC8427592
DOI:
10.1002/ece3.7785
PMID:
34522328
Czasopismo naukowe
Recently diverged butterfly populations in North America have been found to exhibit high levels of divergence on the Z chromosome relative to autosomes, as measured by fixation index, F st . The pattern of divergence appears to result from accumulation of incompatible alleles, obstructing introgression on the Z chromosome in hybrids (i.e., the large-Z effect); however, it is unknown whether this mechanism is sufficient to explain the data. Here, we simulate the effects of hybrid incompatibility on interbreeding butterfly populations using a model in which populations accumulate cross-incompatible alleles in allopatry prior to contact. We compute statistics for introgression and population divergence during contact between model populations and compare our results to those for 15 pairs of butterfly species interbreeding along a suture zone in central Texas. Time scales for allopatry and contact in the model are scaled to glacial and interglacial periods during which real populations evolved in isolation and contact. We find that the data for butterflies are explained well by an otherwise neutral model under slow fusion conditions. In particular, levels of divergence on the Z chromosome increase when interacting clusters of genes are closely linked, consistent with clusters of functionally related genes in butterfly genomes.
Competing Interests: None declared.
(© 2021 The Authors. Ecology and Evolution published by John Wiley & Sons Ltd.)

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