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4 results for “Callosobruchus chinensis”
Data: Female-limited responses in remating rate and mating duration in the experimental evolution of a beetle Callosobruchus chinensis
<p><span>Mating rate optima often differ between the sexes: males may increase their fitness by multiple mating, but for females, multiple mating confers little benefit and can often be costly (especially in taxa without nuptial gifts or mala parental care). Sexually antagonistic evolution is thus expected in traits related to mating rates under sexual selection. This prediction has been tested by multiple studies that applied the experimental evolution technique, which is a powerful tool to directly examine the evolutionary consequences of selection. Yet, the results so far only partly support the prediction. Here we provide another example of experimental evolution of sexual selection, by applying it for the first time to the mating behavior of a seed beetle <em>Callsorobruchus</em> <em>chinensis</em>. We found a lower remating rate in polygamy-line females than in monogamy-line (i.e. no sexual selection) females after 21 generations of selection. Polygamy-line females also showed a longer duration of first mating than monogamy-line females. We found no effect of male evolutionary lines on the remating rate or first mating duration. Though not consistent with the original prediction, the current and previous studies collectively suggest that the observed female-limited responses may be a norm, which is also consistent with the conceptual advances in the last two decades of the advantages and limitations of the experimental evolution technique.</span></p>
Data: Female-limited responses in remating rate and mating duration in the experimental evolution of a beetle Callosobruchus chinensis
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Characterization of hypoxia-inducible factor α and its response to hypoxia in Callosobruchus chinensis (Coleoptera, Bruchidae)
<p class="MsoNormal"><span>Hypoxia-inducible factor (HIF) plays an essential role in hypoxic adaptation in various organisms. <em>Callosobruchus chinensis,</em> a common food storage pest, is highly adapted to hypoxic conditions,</span><span> while</span><span> the underlying mechanism of which is currently unclear. Here, we isolated, sequenced, and bioinformatically analyzed <em>HIF1α</em> from <em>C. chinensis</em>, then examined its mRNA and protein expression profiles under hypoxic conditions for various developmental stages and tissue types. The effects of environmental hypoxia on other genes in the HIF pathway response, aspartyl-hydroxylase (FIH) and prolyl hydroxylase (PHD), were also examined. We found that FIH and PHD were also highly conserved and that their expression varied with developmental stage, tissue type, and environmental hypoxia. Overall, hypoxia caused an increase in <em>HIF1α </em>and <em>FIH</em> mRNA expression, and a decrease in <em>PHD </em>mRNA expression, while expression of their proteins showed different</span><span> in response to hypoxia</span><span>. HIF1α protein levels increased, PHD and FIH protein levels decreased</span><span> under hypoxic conditions, compared to normoxic conditions</span><span>. This study has preliminarily investigated the bioinformation of <em>C. chinensis</em> HIF1α response relationship between HIF1α and its hydroxylases under normoxic and hypoxic conditions, which might provide important clues for future work on clarifying the mechanism of stored-product insect unique hypoxia adaption.</span></p>
Characterization of hypoxia-inducible factor α and its response to hypoxia in Callosobruchus chinensis (Coleoptera, Bruchidae)
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OpenNeuro
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