Host inbreeding increases susceptibility to ectoparasitism
Inbreeding, which increases homozygosity throughout the genome by increasing the proportion of alleles that are identical by descent, is expected to compromise resistance against parasitism. Here, we demonstrate that host inbreeding increases susceptibility to ectoparasitism in a natural fruit fly (...
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| Veröffentlicht in: | Journal of evolutionary biology 2007-01, Vol.20 (1), p.79-86 |
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| container_title | Journal of evolutionary biology |
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| creator | LUONG, L. T. HEATH, B. D. POLAK, M. |
| description | Inbreeding, which increases homozygosity throughout the genome by increasing the proportion of alleles that are identical by descent, is expected to compromise resistance against parasitism. Here, we demonstrate that host inbreeding increases susceptibility to ectoparasitism in a natural fruit fly (Drosophila nigrospiracula) – mite (Macrocheles subbadius) association, and that this effect depends on host genetic background. Moreover, flies generated from reciprocal crosses between susceptible inbred lines exhibited elevated levels of resistance similar to that in the mass‐bred base population, confirming in reverse direction the causative link between expected heterozygosity and resistance. We also show that inbreeding reduces the host's ability to sustain energetically expensive behaviours, and that host exhaustion dramatically increases susceptibility. These findings suggest that inbreeding depression for resistance results from an inability to sustain defensive behaviours because of compromised physiological competence. |
| doi_str_mv | 10.1111/j.1420-9101.2006.01226.x |
| format | Article |
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T.</au><au>HEATH, B. D.</au><au>POLAK, M.</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Host inbreeding increases susceptibility to ectoparasitism</atitle><jtitle>Journal of evolutionary biology</jtitle><addtitle>J Evol Biol</addtitle><date>2007-01</date><risdate>2007</risdate><volume>20</volume><issue>1</issue><spage>79</spage><epage>86</epage><pages>79-86</pages><issn>1010-061X</issn><eissn>1420-9101</eissn><abstract>Inbreeding, which increases homozygosity throughout the genome by increasing the proportion of alleles that are identical by descent, is expected to compromise resistance against parasitism. Here, we demonstrate that host inbreeding increases susceptibility to ectoparasitism in a natural fruit fly (Drosophila nigrospiracula) – mite (Macrocheles subbadius) association, and that this effect depends on host genetic background. 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| source | MEDLINE; Wiley Online Library Journals Frontfile Complete; Elektronische Zeitschriftenbibliothek - Frei zugängliche E-Journals; Oxford University Press Journals All Titles (1996-Current); Alma/SFX Local Collection |
| subjects | Analysis of Variance Animals Arizona Body Constitution - physiology Crosses, Genetic Drosophila Drosophila - genetics Drosophila - parasitology Drosophila nigrospiracula Evolutionary biology Genetic diversity genetic variation heterozygosity Host-Parasite Interactions Inbreeding inbreeding depression Insects Macrocheles Mites parasite resistance Parasites |
| title | Host inbreeding increases susceptibility to ectoparasitism |
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