期刊
EVOLUTION
卷 64, 期 11, 页码 3198-3204出版社
WILEY
DOI: 10.1111/j.1558-5646.2010.01070.x
关键词
Bacteriocins; entomopathogenic bacteria; genetic variation; population structure
资金
- NSF [DEB-0515832]
- Indiana METACyt Initiative of Indiana University
- Lilly Endowment, Inc.
- United States-Israel Educational Foundation
- Israel Science Foundation
- Division Of Environmental Biology
- Direct For Biological Sciences [0919015] Funding Source: National Science Foundation
Spite occurs when an individual harms itself in the act of harming other individuals. Such behaviors were once assumed to be of limited evolutionary importance, as the conditions for the evolution of spite were thought to be too restrictive. Recent theoretical work, however, suggests that spatial population structure, which allows local competition among genotypes, could favor the evolution of spite. One of the clearest examples of spite is the costly production and release by bacteria of toxins (called bacteriocins) that can kill unrelated strains of the same species. Here, we establish the existence of spatial structure in two natural populations of bacteriocin-producing bacteria. Specifically, relatedness decreased with increasing spatial distance between the field isolates. In addition, toxin-mediated inhibitions were found only between isolates that were collected more than 1 m apart and that were generally less than 80% similar in their genomic fingerprints. Taken together, the results suggest that the bacteria are spatially structured, with mixing of genotypes and spiteful interactions at the boundaries between demes.
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