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8 results for “Genetic compatibility”
A lack of genetically compatible mates constrains the spread of an invasive weed
<ul> <li>Introduced populations often experience lag-times prior to invasion, but the mechanisms constraining rapid expansions of introduced populations are unclear. <i>Solidago altissima</i> is a North American native plant with highly invasive Japanese populations, and introduced Australian populations that are not invasive despite the climatic and ecological suitability of the region.</li> <li>By contrasting Australian with Japanese populations, we tested the hypothesis that Australian population growth is limited by a lack of long-distance dispersal via seeds due to limited number of compatible mates. </li> <li>In the field, Australian populations rarely produced viable seeds. A cross-pollination experiment found that Australian plants are fertile, yet lack compatible mates within Australia. Genetic analysis revealed that Australian individuals descend from a small set of self-incompatible genetic clones, which explains the negligible seed set within Australia.</li> <li>Our results show that low genetic diversity, leading to mate incompatibility, inhibits invasiveness of Australian <i>S. altissima</i>, and provides compelling evidence for genetic, rather than ecological, factors constraining invasion in Australia.</li> </ul>
A lack of genetically compatible mates constrains the spread of an invasive weed
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Data from: No evidence that genetic compatibility drives extra-pair behavior in female blue-footed boobies
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Influence of genetic compatibility on offspring fitness in the red-backed toadlet
<p>Presented are data from a manipulative study investigating the influence of parental genetic compatibility on offspring viability in the red backed toadlet (<em>Pseudophryne coriacea</em>). The study used artificial fertilisation techniques combined with a cross-classified breeding design (North Carolina type II) to control parentage and partition sources of genetic and phenotypic variance in offspring fitness. The study also tested the influence of parental genetic similarity on offspring viability. Quantitative genetic analysis of the data revealed no significant additive genetic effects (sire effects), but highly significant non-additive genetic effects (sire x dam interaction effects), on fertilisation success, survival during embryonic development, and hatching success. Analysis also revealled significant associations between parental genetic similarity and offspring survival (whereby survival was higher when parents were more related), and significant positive relationships between fertilisation success and embryo survival through to hatching.</p>
Data from: Genetic compatibility underlies benefits of mate choice in an external fertilizer
Mate choice is a common feature of sexually-reproducing species. In sessile or sedentary external fertilizers however, direct interactions between reproductive partners are minimal, and instead mate recognition and choice must occur at the level of gametes. It is common for some sperm and egg combinations to have higher fertilization success than others, but it remains unclear whether differences in fertilization reflect gamete-level mate-choice (GMC) for paternal quality or parental compatibility. Here, we examine the mechanisms underlying GMC in an externally fertilizing ascidian. A manipulative mate-choice assay confirmed that offspring viability was greater in clutches where we allowed GMC than in clutches where we precluded GMC. Complementary, quantitative genetic experiments then revealed that paternal quality effects were generally weaker than parental compatibility effects, particularly for the trait combination underlying the benefits of GMC. Overall, our data suggest that gametes that are more compatible at fertilization produce more viable offspring than gametes that are less compatible at fertilization. Therefore, although the regalia we typically associate with sexual selection are absent in external fertilizers, mechanisms that allow females to bias fertilization in favour of some males over others produce significant fitness benefits in organisms reproducing via the ancestral strategy.
Data from: Genetic compatibility underlies benefits of mate choice in an external fertilizer
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Data from: Genetic compatibility affects division of labor in the Argentine ant Linepithema humile
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Influence of genetic compatibility on offspring fitness in the red-backed toadlet
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