Epistasis, GeneticVulvaCaenorhabditis elegans ProteinsCaenorhabditis elegansMutationPhenotypeAnimals, Genetically ModifiedModels, GeneticDrosophila ProteinsGenetic PleiotropyQuantitative Trait LociGene Expression Regulation, DevelopmentalSignal TransductionMolecular Sequence DataGenetic FitnessCrosses, GeneticMultifactor Dimensionality ReductionSexGenotypeSelection, GeneticQuantitative Trait, HeritableChromosome MappingHybrid VigorHaploidyAllelesEvolution, MolecularGenetics, PopulationBiological EvolutionPolymorphism, Single NucleotideGenetic VariationLinkage DisequilibriumReproduction, AsexualRecombination, Genetic