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          Institute: MPI für Evolutionsbiologie     Collection: Evolutionary genetics     Display Documents

ID: 582134.0, MPI für Evolutionsbiologie / Evolutionary genetics
Reduced male fertility is common but highly variable in form and severity in a natural house mouse hybrid zone
Authors:Turner, Leslie M.; Schwahn, Denise J.; Harr, Bettina
Date of Publication (YYYY-MM-DD):2012-02
Title of Journal:Evolution
Issue / Number:2
Start Page:443
End Page:458
Review Status:not specified
Audience:Not Specified
Abstract / Description:Barriers to gene flow between naturally hybridizing taxa reveal the initial stages of speciation. Reduced hybrid fertility is a common feature of reproductive barriers separating recently diverged species. In house mice (Mus musculus), hybrid male sterility has been studied extensively using experimental crosses between subspecies. Here, we present the first detailed picture of hybrid male fertility in the European M. m. domesticus—M. m. musculus hybrid zone. Complete sterility appears rare or absent in natural hybrids but a large proportion of males (∼30%)have sperm count or relative testis weight below the range in pure subspecies, and likely suffer reduced fertility. Comparison of a suite of traits related to fertility among subfertile males indicates reduced hybrid fertility in the contact zone is highly variable among individuals and ancestry groups in the type, number, and severity of spermatogenesis defects present. Taken together, these results suggest multiple underlying genetic incompatibili- ties are segregating in the hybrid zone, which likely contribute to reproductive isolation between subspecies.
Free Keywords:hybridization; hybrid male sterility; Mus musculus; reproductive isolation; speciation
External Publication Status:published
Document Type:Article
Communicated by:Brigitte Lechner
Affiliations:MPI für Evolutionsbiologie/Abt. Evolutionsgenetik
External Affiliations:Research Animal Resources Center, University of Wisconsin, Madison, Wisconsin 53726; Laboratory of Genetics, 2455 Genetics/ Biotechnology,University of Wisconsin, Madison, WI 53706
Identifiers:ISSN:0014-3820 (print) [ID-No:1]
ISSN:1558-5646 (online) [ID-No:2]
DOI:10.1111/j.1558-5646.2011.01445.x [ID-No:3]
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