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5 results for “matriline effects”
Parental breeding age effects on descendants' longevity interact over two generations in matrilines and patrilines
<p>Individuals within populations vary enormously in mortality risk and longevity, but the causes of this variation remain poorly understood. A potentially important and<br> phylogenetically widespread source of such variation is maternal age at breeding, which typically has negative effects on offspring longevity. Here, we show that paternal<br> age can affect offspring longevity as strongly as maternal age does, and that breeding age effects can interact over two generations in both matrilines and patrilines. We<br> manipulated maternal and paternal ages at breeding over two generations in the neriid fly Telostylinus angusticollis. To determine whether breeding age effects can be<br> modulated by the environment, we also manipulated larval diet and male competitive environment in the first generation. We found separate and interactive effects of<br> parental and grandparental ages at breeding on descendants' mortality rate and lifespan in both matrilines and patrilines. These breeding age effects were not<br> modulated by grandparental larval diet quality or competitive environment. Our findings suggest that variation in maternal and paternal ages at breeding could contribute<br> substantially to intra-population variation in mortality and longevity.</p>
Parental breeding age effects on descendants’ longevity interact over two generations in matrilines and patrilines
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Data from: Matriline effects on metamorphic traits in a natural system in the European common frog (Rana temporaria)
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Data from: Matrilineal inheritance of a key mediator of prenatal maternal effects
Sex-linkage is predicted to evolve in response to sex-specific or sexually antagonistic selection. In line with this prediction, most sex-linked genes are associated with reproduction in the respective sex. In addition to traits directly involved in fertility and fecundity, mediators of maternal effects may be predisposed to evolve sex-linkage, because they indirectly affect female fitness through their effect on offspring phenotype. Here, we test for sex-linked inheritance of a key mediator of prenatal maternal effects in oviparous species, the transfer of maternally derived testosterone to the eggs. Consistent with maternal inheritance, we found that in Japanese quail (Coturnix japonica) granddaughters resemble their maternal (but not their paternal) grandmother in yolk testosterone deposition. This pattern of resemblance was not due to non-genetic priming effects of testosterone exposure during prenatal development, as an experimental manipulation of yolk testosterone levels did not affect the females' testosterone transfer to their own eggs later in life. Instead, W chromosome and/or mitochondrial variation may underlie the observed matrilineal inheritance pattern. Ultimately, the inheritance of mediators of maternal effects along the maternal line will allow for a fast and direct response to female-specific selection, thereby affecting the dynamics of evolutionary processes mediated by maternal effects.
Data from: Matrilineal inheritance of a key mediator of prenatal maternal effects
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Allen Brain Atlas
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OpenNeuro
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