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Mutation accumulation and fitness effects in hybridogenetic populations: a comparison to sexual and asexual systems.

Authors
  • Som, Christian
  • Bagheri, Homayoun C
  • Reyer, Heinz-Ulrich
Type
Published Article
Journal
BMC Evolutionary Biology
Publisher
Springer (Biomed Central Ltd.)
Publication Date
Jan 01, 2007
Volume
7
Pages
80–80
Identifiers
PMID: 17517124
Source
Medline
License
Unknown

Abstract

Since mutation accumulation can be less pronounced in hybridogenetic populations, the question arises why hybridogenetic organisms are so scarce compared to sexual species. In considering this, it is likely that comparison of population fitnesses is not sufficient. Despite competition with the sexual parental species, hybrid populations are dependent on the maintenance of--and contact with--their sexual counterpart. Other problems may involve too little genetic diversity to respond to changing environments and problems in becoming hybridogenetic (e.g. disruption of meiosis and subsequent infertility or sterility). Yet, lower mutation accumulation in hybridogenetic populations opens the possibility that hybridogenetic species can develop into new sexual species once recombination is re-established and reproductive isolation from sexual ancestors has occurred.

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