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4 results for “Lycaeides melissa”
Data from: Genome divergence and the genetic architecture of barriers to gene flow between Lycaeides idas and L. melissa
Genome divergence during speciation is a dynamic process that is affected by various factors, including the genetic architecture of barriers to gene flow. Herein we quantitatively describe aspects of the genetic architecture of two sets of traits, male genitalic morphology and oviposition preference, that putatively function as barriers to gene flow between the butterfly species Lycaeides idas and L. melissa. Our analyses are based on unmapped DNA sequence data and a recently developed Bayesian regression approach that includes variable selection and explicit parameters for the genetic architecture of traits. A modest number of nucleotide polymorphisms explained a small to large proportion of the variation in each trait, and average genetic variant effects were non-negligible. Several genetic regions were associated with variation in multiple traits or with trait variation within- and among-populations. In some instances genetic regions associated with trait variation also exhibited exceptional genetic differentiation between speices or exceptional introgression in hybrids. These results are consistent with the hypothesis that divergent selection on male genitalia has contributed to heterogeneous genetic differentiation, and that both sets of traits affect fitness in hybrids. Although these results are encouraging, we highlight several difficulties related to understanding the genetics of speciation.
Immune assay data for Lycaeides melissa larvae reared on different host plants and with/without egg microbes
<p class="MsoListParagraphCxSpFirst"><span>1.<span> </span></span><span>Maternally transmitted microbes are ubiquitous. In insects, maternal microbes can play a role in mediating the insect immune response. </span><span>Less is known about how ecological factors, such as resource use, interact with maternal microbes to affect immunity. </span></p> <p class="MsoListParagraphCxSpMiddle"><span>2.<span> </span></span><span>In the context of a recent colonization of a novel host plant by the Melissa blue butterfly (<em>Lycaeides melissa</em>), we investigated the interaction between host plant use and vertically transmitted, extracellular egg-associated microbes in determining the strength of the insect immune response. </span></p> <p class="MsoListParagraphCxSpMiddle"><span>3.<span> </span></span><span>We reared larvae on two different host plant species: a native host <em>Astragalus canadensis</em> and a novel host <em>Medicago sativa</em>. Egg-associated microbes were removed through a series of antimicrobial egg washes prior to hatching. Immune response was measured through three assays: standing phenoloxidase (PO), total PO, and melanization. </span></p> <p class="MsoListParagraphCxSpMiddle"><span>4.<span> </span></span><span>We detected strong effects of microbial removal. Egg washing resulted in larvae with an increased immune response as measured by total PO- contrary to reports from other taxa. The effect of washing was especially strong for larvae consuming the native host plant. </span></p> <p> </p> <p class="MsoListParagraphCxSpLast"><span>5.<span> </span></span><span>This result may explain why consumption of the egg casing is not a universal behaviour in insects, due to negative effects on larval immunity. </span></p>
Data from: Genome divergence and the genetic architecture of barriers to gene flow between Lycaeides idas and L. melissa
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Immune assay data for Lycaeides melissa larvae reared on different host plants and with/without egg microbes
Open the record for dataset details and reuse information.
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