2010
DOI: 10.1098/rspb.2010.0514
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Inbreeding depresses sperm competitiveness, but not fertilization or mating success in male Tribolium castaneum

Abstract: As populations decline to levels where reproduction among close genetic relatives becomes more probable, subsequent increases in homozygous recessive deleterious expression and/or loss of heterozygote advantage can lead to inbreeding depression. Here, we measure how inbreeding across replicate lines of the flour beetle Tribolium castaneum impacts on male reproductive fitness in the absence or presence of male -male competition. Effects on male evolution from mating pattern were removed by enforcing monogamous … Show more

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Cited by 67 publications
(105 citation statements)
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“…Increased within‐male variation in sperm length has been found for inbred males in an experimental study of Tribolium castaneum beetles (Michalczyk et al. 2010). In their study, however, it was unclear whether only morphologically normal sperm cells were measured.…”
Section: Discussionmentioning
confidence: 99%
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“…Increased within‐male variation in sperm length has been found for inbred males in an experimental study of Tribolium castaneum beetles (Michalczyk et al. 2010). In their study, however, it was unclear whether only morphologically normal sperm cells were measured.…”
Section: Discussionmentioning
confidence: 99%
“…Male fitness also depends on postcopulatory processes (Birkhead 2010) and both sperm quality (sperm velocity or morphometry) and sperm quantity have been shown to affect male reproductive performance in a range of animal taxa (Parker 1998; Snook 2005; Michalczyk et al. 2010), including birds (Denk et al. 2005; Pizzari et al.…”
Section: Introductionmentioning
confidence: 99%
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“…However, to our knowledge there is no study that has assessed whether male reproductive success in plants is directly affected by the levels of inbreeding, in particular, under conditions of natural interaction with pollinators and mixed pollen loads [1]. In animals with multiple mating, sometimes the effects of inbreeding depression on siring success are only revealed under competition for fertilization [30,31], and few studies have investigated whether inbreeding directly affects male fitness (e.g. [18,32]).…”
Section: Introductionmentioning
confidence: 99%
“…High-quality fathers (those with relatively low inbreeding) would presumably have a higher probability of fertilization in promiscuous contexts (e.g. see [17]). Inbreeding is heritable in some systems [18,19] (see electronic supplementary material S2)-with parental levels correlating with offspring inbreeding under non-random mating-allowing for paternal sex ratio bias driven by inbreeding to be adaptive.…”
Section: Introductionmentioning
confidence: 99%