Paternity success depends on male genetic characteristics in the terrestrial isopod Armadillidium vulgare

Durand, Sylvine; Cohas, Aurélie; Braquart‐Varnier, Christine; Beltran‐Bech, Sophie

doi:10.1007/s00265-017-2317-1

Cited by 8 publications

(7 citation statements)

References 65 publications

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“…This suggests that more heterozygous females possess a better reproductive potential. Despite this, both in the present study and in previous work, those females did not produce more pulli (Durand et al, ). Stronger mechanisms acting between the end of incubation and pulli collection after birth might be masking the effect of female heterozygosity.…”

Section: Discussioncontrasting

confidence: 97%

“…We observed that more similar parents tended to produce fewer pulli , which might simply result from the small sample size used in this study compared to previous work where this effect was significant (Durand et al, ). One of the aims of the present study was to determine the mechanisms responsible for such effect.…”

Section: Discussioncontrasting

confidence: 76%

“…If ever present, correlations between heterozygosity and genetic similarity are usually negative (Roberts, Hale, & Petrie, ). We did not detect such correlation in experiment 1, nor for female heterozygosity in experiment 2, or in other studies carried on this species using the same molecular markers (Durand et al, , ). Consequently, the correlation between male heterozygosity and parental genetic similarity is very unlikely to reflect any biological relationship, and might solely result from the random assignation of heterozygous males to more similar partners in experiment 2.…”

Section: Discussioncontrasting

confidence: 70%

“…Males presented to two unrelated females display a precopulatory preference toward the most genetically dissimilar female, provided both females offer a wide enough range of genetic similarity to the male (Durand, Beauché, Richard, & Beltran‐Bech, ). Moreover, when two males are allowed to reproduce simultaneously with the same female, paternity success is higher for the most heterozygous male, and in cases where a single male produces offspring, this male is the most dissimilar to the female (Durand, Cohas, Braquart‐Varnier, & Beltran‐Bech, ). So far, when counted within 3 days after birth, more genetically similar parents have been shown to produce fewer offspring (Durand et al, ), but the underlying physiological mechanisms remain unknown.…”

Section: Introductionmentioning

confidence: 99%

“…Moreover, when two males are allowed to reproduce simultaneously with the same female, paternity success is higher for the most heterozygous male, and in cases where a single male produces offspring, this male is the most dissimilar to the female (Durand, Cohas, Braquart‐Varnier, & Beltran‐Bech, ). So far, when counted within 3 days after birth, more genetically similar parents have been shown to produce fewer offspring (Durand et al, ), but the underlying physiological mechanisms remain unknown. The presence of a male is known to positively impact female fecundity, compared to females housed alone or with another female (Lefebvre, ).…”

Section: Introductionmentioning

confidence: 99%

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Producing offspring in Armadillidium vulgare: Effects of genetic diversity and inbreeding

Durand

Loiseau

Prigot

et al. 2018

Evolution and Development

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Genetic diversity is known to be correlated to fitness traits, and inbred individuals often display lower values for life history traits. In this study, we attempt to quantify how inbreeding affects such traits in the terrestrial isopod Armadillidium vulgare by performing inbred and non-inbred crosses under laboratory conditions. We estimated genetic characteristics of parents and offspring, and related them to fecundity and fertility measures, as well as offspring growth and survival. Our study shows that a decrease in offspring number might result from mortality around birth, but not to changes in fecundity, fertilization rate, or developmental failure between inbred and non-inbred crosses. More heterozygous females tended to be bigger and had a higher fecundity, which could have implications in mate choice. No effect of inbreeding was detected on offspring growth and survival. These results can be related to previously observed effects of genetic characteristics on mating strategies in A. vulgare, and could shed light on mechanisms of inbreeding avoidance in this species.

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Section: Discussioncontrasting

confidence: 97%

Section: Discussioncontrasting

confidence: 76%

Section: Discussioncontrasting

confidence: 70%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Producing offspring in Armadillidium vulgare: Effects of genetic diversity and inbreeding

Durand

Loiseau

Prigot

et al. 2018

Evolution and Development

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When GIS zooms in: spatio-genetic maps of multipaternity in Armadillidium vulgare

Bech¹,

Depeux²,

Durand³

et al. 2017

Genetica

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Geographic information system (GIS) tools are designed to illustrate, analyse and integrate geographic or spatial data, usually on a macroscopic scale. By contrast, genetic tools focus on a microscopic scale. Because in reality, landscapes have no predefined scale, our original study aims to develop a new approach, combining both cartographic and genetic approaches to explore microscopic landscapes. For this, we focused on Armadillidium vulgare, a terrestrial isopod model in which evolutionary pressures imposed by terrestrial life have led to the development of internal fertilisation and, consequently, to associated physiological changes. Among these, the emergence of internal receptacles, found in many taxa ranging from mammals to arthropods, allowed females to store sperm from several partners, enabling multipaternity. Among arthropods, terrestrial isopods like the polygynandrous A. vulgare present a female structure, the marsupium, in which fertilised eggs migrate and develop into mancae (larval stage). To test our innovative combined approach, we proposed different males to four independent females, and at the end of incubation in the marsupium, we mapped (using GIS methods) and genotyped (using 12 microsatellite markers) all the incubated mancae. This methodology permitted to obtain spatio-genetic maps describing heterozygosity and spatial distribution of mancae and of multipaternity within the marsupial landscape. We discussed the interest of this kind of multidisciplinary approach which could improve in this case our understanding of sexual selection mechanisms in this terrestrial crustacean. Beyond the interesting model-focused insights, the main challenge of this study was the transfer of GIS techniques to a microscopic scale and our results appear so as pioneers rendering GIS tools available for studies involving imagery whatever their study scale.

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Fine-scale population structure analysis in Armadillidium vulgare (Isopoda: Oniscidea) reveals strong female philopatry

et al. 2019

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In the last decades, dispersal studies have benefited from the use of molecular markers for detecting patterns differing between categories of individuals and have highlighted sex-biased dispersal in several species. To explain this phenomenon, several hypotheses implying mating systems, intrasexual competition or sex-related handicaps have been proposed. In this context, we investigated sex-biased dispersal in Armadillidium vulgare, a terrestrial isopod with a promiscuous mating system. As a proxy for effective dispersal, we performed a fine-scale investigation of the spatial genetic structure in males and females, using individuals originating from five sampling points located within 70 meters of each other. Based on microsatellite markers and spatial autocorrelation analyses, our results revealed that while males did not present a significant genetic structure at this geographic scale, females were significantly and genetically more similar to each other when they were collected in the same sampling point. As females invest more parental care than males in A. vulgare, but also because this species is promiscuous and males experience a high intrasexual competition, our results meet the predictions of most classical hypotheses for sex-biased dispersal. We suggest that widening dispersal studies to other isopods or crustaceans, differing in their ecology or mating system and displaying varying levels of parental care, might shed light on the processes underlying the evolution of sex-biased dispersal.

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Paternity success depends on male genetic characteristics in the terrestrial isopod Armadillidium vulgare

Cited by 8 publications

References 65 publications

Producing offspring in Armadillidium vulgare: Effects of genetic diversity and inbreeding

Producing offspring in Armadillidium vulgare: Effects of genetic diversity and inbreeding

When GIS zooms in: spatio-genetic maps of multipaternity in Armadillidium vulgare

Fine-scale population structure analysis in Armadillidium vulgare (Isopoda: Oniscidea) reveals strong female philopatry

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