caa a22 4500 477091040 CHVBK 20180405111515.0 cr unu---uuuuu 170330e19961101xx s 000 0 eng 10.1007/BF01237709 doi (NATIONALLICENCE)springer-10.1007/BF01237709 Distribution and fitness effects of the son-killer bacterium in Nasonia [Elektronische Daten] [Michael Balas, Michelle Lee, John Werren] Summary: Maternally inherited microorganisms that kill male (but not female) progeny are widespread in nature. Three hypotheses have been proposed for the evolution of male-killing microorganisms: inbreeding reduction, release of resources to remaining females and inoculum for horizontal transmission. The sonkiller bacterium,Arsenophonus nasoniae, is a maternally inherited bacterium that causes lethality of male embryos of infected females in the parasitoid wasp,Nasonia vitripennis. In this paper we describe the geographical distribution and frequency of the son-killer bacterium in North American populations ofN. vitripennis andNasonia longicornis. We tested the resource release hypothesis using the body size measurements of infected and uninfected females from natural populations. No evidence was found for a fitness increase of females infected with the bacterium compared to uninfected females. We propose a modification of the existing models, termed the ‘incremental gain' hypothesis. According to this model, the bacteria are maintained in host populations due to horizontal transmission and male killing provides an incremental gain in the fitness of infected females relative to females infected with non-male-killing bacteria. Chapman & Hall, 1996 parasitoid wasp nationallicence sex ratio distorter nationallicence male-killing microorganism nationallicence Nasonia vitripennis nationallicence Nasonia longicornis nationallicence Nasonia giraulti nationallicence Balas Michael Department of Biology, University of Rochester, 14627, Rochester, NY, USA aut Lee Michelle Department of Biology, University of Rochester, 14627, Rochester, NY, USA aut Werren John Department of Biology, University of Rochester, 14627, Rochester, NY, USA aut Evolutionary Ecology Kluwer Academic Publishers 10/6(1996-11-01), 593-607 0269-7653 10:6<593 1996 10 10682 https://doi.org/10.1007/BF01237709 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/BF01237709 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Balas Michael Department of Biology, University of Rochester, 14627, Rochester, NY, USA aut NATIONALLICENCE 700 1- Lee Michelle Department of Biology, University of Rochester, 14627, Rochester, NY, USA aut NATIONALLICENCE 700 1- Werren John Department of Biology, University of Rochester, 14627, Rochester, NY, USA aut NATIONALLICENCE 773 0- Evolutionary Ecology Kluwer Academic Publishers 10/6(1996-11-01), 593-607 0269-7653 10:6<593 1996 10 10682 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer