SOCIAL CAUSES OF CORRELATIONAL SELECTION AND THE RESOLUTION OF A HERITABLE THROAT COLOR POLYMORPHISM IN A LIZARD

摘要: When selection acts on social or behavioral traits, the fitness of an individual depends phenotypes its competitors. Here, we describe methods and statistical inference for measuring natural in small groups. We measured throat color alleles that arises from microgeographic variation allele frequency at natal sites side-blotched lizards (Uta stansburiana). Previous game-theoretic analysis indicates two morphs female are engaged offspring quantity-quality game promotes a density-and frequency-dependent cycle. Orange-throated females r-strategists. They lay large clutches progeny, which have poor survival high density, but good low density. In contrast, yellow-throated K-strategists. tested three predictions game: (1) orange progeny should advantage density; (2) correlational to couple size; (3) this hatchling size confers advantage, only when yellow rare. also confirmed heritability color, therefore genetic basis, by producing controlled matings. A parsimonious cause is (o, b, y) segregate as one factor. review physiology formation explain possible architecture trait. Heritability was nearly additive our breeding study, allowing us compute genotypic value each thus predict released 116 plots. Rather than study studied how their varied with prediction 1: present they higher density compared other alleles. Even though difference egg (0.02 g), it led knife-edged effects depending local context. Selection not dependent alleles, interaction between size, 2. Sire effects, confounded maternal phenotype, allowed resolve dependence thereby 3. favored sire were rare, common. Correlational self-reinforcing correlation life-history variation, causes next cycle be exacerbated. discuss general conditions evolution correlations arise associated sexual selection.