Heterozygosity–fitness correlations in blue tit nestlings (Cyanistis caeruleus) under contrasting rearing conditions

Arct, Aneta; Sudyka, Joanna; Podmokła, Edyta; Drobniak, Szymon M.; Gustafsson, Lars; Cichoń, Mariusz

doi:10.1007/s10682-017-9911-6

Cited by 11 publications

(25 citation statements)

References 51 publications

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“…This could theoretically be due to a causal relationship between the individual level of genetic diversity and the PHA immune response (Fossøy, Johnsen, & Lifjeld, 2008). However, a correlation between the PHA immune response and individual level of heterozygosity was not supported in our previous studies on the same population of blue tits (Arct et al, 2017…”

Section: Discussioncontrasting

confidence: 61%

“…This obviously reduces the power to find a significant interaction between experimental treatment and parental genetic similarity. Our previous studies on blue tits also did not support the idea that heterozygosity-fitness correlations become stronger under stressful conditions than under optimal conditions (Arct et al, 2017). This does not, however, exclude the possibility that other environmental factors, such as parasite prevalence, food availability, or harsh weather conditions, might strengthen the association between parental genetic similarity and offspring fitness.…”

Section: Discussionmentioning

confidence: 66%

“…Additionally, on day 14 after hatching, nestlings were measured for tarsus length and ringed. To assess nestling T‐cell‐mediated immune response, on day 11 posthatching nestlings were injected with a nonpathogenic antigen, phytohemagglutinin (PHA) into their right wing web, and 24 hr later, the thickness of the wing web was measured with a pressure‐sensitive calliper (see details in Drobniak et al () and Arct, Drobniak, Podmokła, Gustafson, and Cichoń (), Arct et al ()). The measurements were taken by a single person and were highly repeatable ( r = 0.92, F 461,924 = 36.1, p < 0.0001).…”

Section: Methodsmentioning

confidence: 99%

“…Sexing of nestlings was performed by using the P2–P8 primers (Griffiths, Double, Orr, & Dawson, ) that amplify the sex‐specific CHD locus. Parentage was assigned by genotyping adults and chicks at 5–15 microsatellite loci, as described in the study by Arct et al () and Arct et al (). In total, 30 out of 72 broods contained at least one extra‐pair young (EPY) and 55 out of 716 offspring were identified as EPY.…”

Section: Methodsmentioning

confidence: 99%

“…et al (2013) andArct et al (2017). In total, 30 out of 72 broods con-tained at least one extra-pair young (EPY) and 55 out of 716 offspring were identified as EPY.…”

mentioning

confidence: 99%

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Parental genetic similarity and offspring performance in blue tits in relation to brood size manipulation

Arct

Drobniak

Mellinger

et al. 2019

Ecology and Evolution

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In birds, as in many other taxa, higher genetic similarity of mates has long been known to reduce offspring fitness. To date, the majority of avian studies have focused on examination whether the genetic similarity of social mates predicts hatching success. Yet, increased genetic similarity of mates may also reduce offspring fitness during later life stages, including the nestling period and beyond. Here, we investigated whether parental genetic similarity influences offspring performance using data from free‐living blue tits (Cyanistes caeruleus) collected across three breeding seasons. Additionally, we tested whether brood size manipulation affects the magnitude and direction of the relationship between genetic similarity of mates and offspring performance. Sixteen microsatellite markers were used to measure genetic similarity between biological parents. We found that the genetic similarity of parents negatively affects offspring immune response and this effect was independent of the experimental brood size manipulation.

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Section: Discussioncontrasting

confidence: 61%

Section: Discussionmentioning

confidence: 66%

Section: Methodsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

“…et al (2013) andArct et al (2017). In total, 30 out of 72 broods con-tained at least one extra-pair young (EPY) and 55 out of 716 offspring were identified as EPY.…”

mentioning

confidence: 99%

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Parental genetic similarity and offspring performance in blue tits in relation to brood size manipulation

Arct

Drobniak

Mellinger

et al. 2019

Ecology and Evolution

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Seychelles warblers with silver spoons: Juvenile body mass is a lifelong predictor of annual survival, but not annual reproduction or senescence

Brown

Dugdale

Hammers

et al. 2022

Ecology and Evolution

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The environment experienced during development, and its impact on intrinsic condition, can have lasting outcomes for individual phenotypes and could contribute to variation in adult senescence trajectories. However, the nature of this relationship in wild populations remains uncertain, owing to the difficulties in summarizing natal conditions and in long‐term monitoring of individuals from free‐roaming long‐lived species. Utilizing a closely monitored, closed population of Seychelles warblers (Acrocephalus sechellensis), we determine whether juvenile body mass is associated with natal socioenvironmental factors, specific genetic traits linked to fitness in this system, survival to adulthood, and senescence‐related traits. Juveniles born in seasons with higher food availability and into smaller natal groups (i.e., fewer competitors) were heavier. In contrast, there were no associations between juvenile body mass and genetic traits. Furthermore, size‐corrected mass—but not separate measures of natal food availability, group size, or genetic traits—was positively associated with survival to adulthood, suggesting juvenile body mass is indicative of natal condition. Heavier juveniles had greater body mass and had higher rates of annual survival as adults, independent of age. In contrast, there was no association between juvenile mass and adult telomere length attrition (a measure of somatic stress) nor annual reproduction. These results indicate that juvenile body mass, while not associated with senescence trajectories, can influence the likelihood of surviving to old age, potentially due to silver‐spoon effects. This study shows that measures of intrinsic condition in juveniles can provide important insights into the long‐term fitness of individuals in wild populations.

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Heterozygosity and fitness in a threatened songbird: blood parasite infection is explained by single-locus but not genome-wide effects

et al. 2020

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In non-pedigreed populations, insights into effects of inbreeding can be obtained by correlations between individual heterozygosity and fitness-related traits (HFCs). Using an information-theoretic approach, we explored whether heterozygosity of microsatellite markers, measured as internal relatedness (IR), is associated with infection by blood parasites (Plasmodium, Trypanosoma, or Leucocytozoon) in the threatened Aquatic Warbler (Acrocephalus paludicola). We also explored whether any of the markers is more influential than others, or than IR, in explaining blood parasitism (single-locus effects). While we observed that IR was a relatively important predictor of Plasmodium parasitism, we did not find strong evidence for IR to correlate with infection by the identified blood parasites, accounting for sex and population effects. Therefore, our data did not support negative inbreeding effects on blood parasite infection in the Aquatic Warbler. However, we found singlelocus effects, such that individuals heterozygous at AW-03 and Ase19 had lower probability of infection by blood parasites pooled together and by Plasmodium, respectively. This indicates that these two markers are in linkage disequilibrium with unknown fitness loci which are related to resisting or clearing blood parasites, and which confer a heterozygote advantage in the Aquatic Warbler. Our results add to the growing evidence that single-locus effects contribute more to HFCs than formerly recognized and have implications for Aquatic Warbler conservation. Keywords Heterozygosity-fitness correlations • General effects • Local effects • Plasmodium • Trypanosoma • Aquatic Warbler Zusammenfassung Heterozygosität und Fitness bei einem bedrohten Singvogel: Blutparasitenbefall wird durch Einzel-Lokus, aber nicht durch Genom-weite Effekte erklärt Für Populationen, für die keine Informationen zu Abstammungsverhältnissen vorliegen, können Einblicke über Inzuchteffekte durch Korrelationen zwischen individueller Heterozygosität und dem Auftreten Fitness-relevanter Merkmale ("heterozygosity-fitness-correlations"; HFCs) gewonnen werden. Für den bedrohten Seggenrohrsänger (Acrocephalus paludicola) untersuchten wir, ob Heterozygosität in Mikrosatelliten Markern, gemessen als interne Verwandtschaft ("internal relatedness"; IR), mit der Befall durch Blutparasiten (Plasmodium, Trypanosoma oder Leucocytozoon) korreliert, in dem wir einen Informationstheoretischen Ansatz wählten. Wir untersuchten ebenfalls, ob irgendeiner der Marker einen größeren Einfluss hat als andere Marker, oder als IR, um den Befall mit Blutparasiten zu erklären (Einzel-Lokus Effekt). Während wir beobachteten, dass IR ein relativ wichtiger Prädiktor für Parasitenbefall mit Plasmodium ist, fanden wir keinen Communicated by M. Wink.

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Heterozygosity–fitness correlations in blue tit nestlings (Cyanistis caeruleus) under contrasting rearing conditions

Cited by 11 publications

References 51 publications

Parental genetic similarity and offspring performance in blue tits in relation to brood size manipulation

Parental genetic similarity and offspring performance in blue tits in relation to brood size manipulation

Seychelles warblers with silver spoons: Juvenile body mass is a lifelong predictor of annual survival, but not annual reproduction or senescence

Heterozygosity and fitness in a threatened songbird: blood parasite infection is explained by single-locus but not genome-wide effects

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