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Related Concept Videos

Frequency-dependent Selection01:21

Frequency-dependent Selection

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When the fitness of a trait is influenced by how common it is (i.e., its frequency) relative to different traits within a population, this is referred to as frequency-dependent selection. Frequency-dependent selection may occur between species or within a single species. This type of selection can either be positive—with more common phenotypes having higher fitness—or negative, with rarer phenotypes conferring increased fitness.
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Natural Selection and Mating Preferences01:06

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The principle of natural selection posits that organisms better adapted to their environment are more likely to survive and reproduce. This principle is closely intertwined with mating preferences, a key aspect of sexual selection, which evolutionary psychologists believe is driven by instincts to propagate one's genes. Such instincts significantly influence mating behaviors and preferences between genders.
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Mate Choice01:20

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Mate choice—the decision about whom to mate with—is a type of natural selection, since animals must reproduce to pass down their genes. Mate choice is also called intersexual selection because the behavior occurs between the sexes.
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Asexual reproduction allows plants to reproduce without growing flowers, attracting pollinators, or dispersing seeds. Offspring are genetically identical to the parent and produced without the fusion of male and female gametes.
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Speciation describes the formation of one or more new species from one or sometimes multiple original species. The resulting species are discrete from the parent species, and barriers to reproduction will typically exist. There are two primary mechanisms, speciation with and without geographic isolation—allopatric and sympatric speciation, respectively.
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Field Experiments of Pollination Ecology: The Case of Lycoris sanguinea var. sanguinea
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The Scope for Postmating Sexual Selection in Plants.

Jeanne Tonnabel1, Patrice David1, Tim Janicke2

  • 1CEFE, Univ Montpellier, CNRS, Univ Paul Valéry Montpellier 3, EPHE, IRD, Montpellier, France.

Trends in Ecology & Evolution
|March 29, 2021
PubMed
Summary
This summary is machine-generated.

Sexual selection influences plant traits after pollination, affecting pollen-pistil interactions. Further research is needed to understand how sexual selection shapes these crucial post-pollination reproductive processes.

Keywords:
Fisherian runawaygenetic correlationgood-genes modelmate choicepollen-pistil interactionssexual selection

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Area of Science:

  • Plant reproductive biology
  • Evolutionary biology
  • Sexual selection in plants

Background:

  • Sexual selection shapes plant traits influencing mating success during pollination.
  • Its impact on post-pollination pollen-pistil interactions remains less understood.
  • Both male-male competition and female choice are plausible drivers of post-pollination selection.

Purpose of the Study:

  • To explore the influence of sexual selection on traits involved in pollen-pistil interactions.
  • To examine how sexual selection mechanisms like 'Fisherian runaway' and 'good-genes' models may operate post-pollination.
  • To identify research gaps in understanding sexual selection in plant reproductive processes.

Main Methods:

  • Review of existing literature on sexual selection in plants.
  • Analysis of molecular and cellular mechanisms of pollen-pistil interactions.
  • Theoretical consideration of sexual selection models applied to post-pollination events.

Main Results:

  • Sexual selection can plausibly affect pollen-pistil interactions, a phase involving direct physical contact.
  • Existing models of sexual selection ('Fisherian runaway', 'good-genes') offer frameworks for understanding these interactions.
  • Specific molecular and cellular aspects of pollen-pistil interactions are potential targets for sexual selection.

Conclusions:

  • Sexual selection likely plays a significant role in shaping traits beyond initial pollination.
  • Understanding these post-pollination interactions is crucial for a complete picture of plant mating systems.
  • Further research is required to elucidate the molecular and evolutionary mechanisms involved.